[^1]

[Table of Contents:]{.underline}

[1. Entities]{.underline}

> [IfcActuator](#IfcActuator)
>
> [IfcAirFilter](#IfcAirFilter)
>
> [IfcAirTerminal](#IfcAirTerminal)

[IfcAirTerminalBox](#IfcAirTerminalBox)

[IfcBoiler](#IfcBoiler)

[IfcChiller](#IfcChiller)

[IfcCoil](#IfcCoil)

[IfcCompressor](#IfcCompressor)

[IfcControlElement](#IfcControlElement)

[IfcController](#IfcController)

[IfcCoolingTower](#IfcCoolingTower)

[IfcDamper](#IfcDamper)

> [IfcDiscreteElement](#IfcDiscreteElement)

[IfcDistributionFlowElement](#IfcDistributionFlowElement)

[IfcFan](#IfcFan)

[IfcFlowController](#IfcFlowController)

[IfcFlowFitting](#IfcFlowFitting)

[IfcFlowSegment](#IfcFlowSegment)

> [IfcFluidFlowProperties](#IfcFluidFlowProperties_)
>
> [IfcFluidMovingDevice](#IfcFluidMovingDevice)
>
> [IfcHydronicHeater](#IfcHydronicHeater)
>
> [IfcHygroscopicMaterialProperties](#IfcHygroscopicMaterialProperties)
>
> [IfcOpticalMaterialProperties](#IfcOpticalMaterialProperties)
>
> [IfcPump](#IfcPump)
>
> [IfcSanitaryTerminal](#IfcSanitaryTerminal)
>
> [IfcSensor](#IfcSensor)
>
> [IfcSpaceThermalLoad](#IfcSpaceThermalLoad)
>
> [IfcTank](#IfcTank)
>
> [IfcThermalMaterialProperties](#IfcThermalMaterialProperties)
>
> [IfcTreatmentDevice](#IfcTreatmentDevice)
>
> [IfcTubeBundle](#IfcTubeBundle)
>
> [IfcUnitHeater](#IfcUnitHeater)
>
> [IfcValve](#IfcValve)

**[2. PropertySets]{.underline}**

> [Pset_AggregateLoadInformation](#Pset_AggregateLoadInformation)
>
> [Pset_AirHandler](#Pset_AirHandler)
>
> [Pset_AirSideSystemInformation](#Pset_AirSideSystemInformation)
>
> [Pset_BackdraftDamper](#Pset_BackdraftDamper)
>
> [Pset_ControlDamper](#Pset_ControlDamper)
>
> [Pset_DuctDesignCriteria](#Pset_DuctDesignCriteria)
>
> [Pset_DuctFitting](#Pset_DuctFitting)
>
> [Pset_DuctSegment](#Pset_DuctSegment)
>
> [Pset_DuctSystemDesignCriteria](#Pset_DuctSystemDesignCriteria)
>
> [Pset_ElectricActuator](#Pset_ElectricActuator)
>
> [Pset_FireDamper](#Pset_FireDamper)
>
> [Pset_FireSmokeDamper](#Pset_FireSmokeDamper)
>
> [Pset_GlazingType](#Pset_GlazingType)
>
> [Pset_GutterSegment](#Pset_GutterSegment)
>
> [Pset_HandOperatedActuator](#Pset_HandOperatedActuator)\
> [Pset_HardwareGroup](#Pset_HardwareGroup)
>
> [Pset_HvacSensor](#Pset_HvacSensor)
>
> [Pset_HydraulicActuator](#Pset_HydraulicActuator)
>
> [Pset_Insulation](#Pset_Insulation)
>
> [Pset_LinearActuator](#Pset_LinearActuator)
>
> [Pset_LoadDesignCriteria](#Pset_LoadDesignCriteria)
>
> [Pset_Louver](#Pset_Louver)
>
> [Pset_ManufactureOccurrence](#Pset_ManufactureOccurrence)
>
> [Pset_OpeningShadingType](#Pset_OpeningShadingType)
>
> [Pset_OutsideDesignCriteria](#Pset_OutsideDesignCriteria)
>
> [Pset_PipeFitting](#Pset_PipeFitting)
>
> [Pset_PipeSegment](#Pset_PipeSegment)
>
> [Pset_PipeSystemDesignCriteria](#Pset_PipeSystemDesignCriteria)
>
> [Pset_SiteWeatherData](#Pset_SiteWeatherData)
>
> [Pset_SmokeDamper](#Pset_SmokeDamper)
>
> [Pset_SoundPowerLevels](#Pset_SoundPowerLevels)
>
> [Pset_SoundPressureLevels](#Pset_SoundPressureLevels)
>
> [Pset_SpaceHvacInformation](#Pset_SpaceHvacInformation)

[]{#IfcActuator .anchor}**[IfcActuator]{.underline}**

[Definition from IAI]{.underline}: This class defines properties of an
actuating device typically used in a control system such as a building
automation control system.

[Attribute definitions:]{.underline}

  -------------------- --- -------------------------------------------------------
  **PredefinedType**   :   Predefined generic types are specified in an
                           Enumeration. A TypeDefinition is available for each
                           generic type (as the required attributes differ). Use
                           Type Definition corresponding to this generic type.\
                           \
                           Type Definitions\
                           Type driven PropertySets\
                           PreDefined Type Associated PropertySet\
                           ElectricActuator Pset_ElectricActuator\
                           PneumaticActuator Pset_PneumaticActuator\
                           HydraulicActuator Pset_HydraulicActuator\
                           HandOperatedActuator Pset_HandOperatedActuator\
                           UserDefined\
                           NotDefined

  **FailPosition**     :   Enumeration defining the types of fail positions for
                           the actuator.
  -------------------- --- -------------------------------------------------------

[]{#IfcAirFilter .anchor}**[IfcAirFilter]{.underline}**

[Definition from IAI]{.underline}: An *IfcAirFilter* is an apparatus
used to remove particulate or gaseous matter from air. It is typically
used in conjunction with another device, such as an AirHandler or
PackagedACUnit.

[Attribute definitions:]{.underline}

  ----------------------- --- ------------------------------------------------------
  **DirtyPressureDrop**   :   Pressure drop at the maximum air flowrate across the
                              filter when the filter needs replacement per ASHRAE
                              Standard 52.1.

  **CleanPressureDrop**   :   Pressure drop at the maximum air flowrate across the
                              filter when the filter is new per ASHRAE Standard
                              52.1.

  **Efficiency**          :   Efficiency value.
  ----------------------- --- ------------------------------------------------------

[]{#IfcAirTerminal .anchor}**[IfcAirTerminal]{.underline}**

[Definition from IAI]{.underline}: An *IfcAirTerminal* is a terminating
or origination point for the transfer of air between distribution
system(s) and one or more space. Air terminals can be any one of the
following:

-   **Diffuser** - An outlet discharging supply air in various
    directions and planes.

-   **Grille** - A covering for any area through which air passes.

-   **Register** - A grille typically equipped with a damper or control
    valve.

-   **Supply opening or Outlet** - Any opening through which air is
    being delivered into a ventilated or conditioned space. or control
    valve.

[Attribute definitions:]{.underline}

  ---------------------------------- --- -------------------------------------------------
  **AirFlowType**                    :   Enumeration of possible AirTerminal types (e.g.,
                                         Supply, Return, Exhaust, etc.).

  **Throw**                          :   The horizontal or vertical axial distance an
                                         airstream travels after leaving an AirTerminal
                                         before the maximum stream velocity is reduced to
                                         a specified terminal velocity.

  **AirDiffusionPerformanceIndex**   :   The Air Diffusion Performance Index (ADPI) is
                                         used for cooling mode conditions. If several
                                         measurements of air velocity and air temperature
                                         are made throughout the occupied zone of a space,
                                         the ADPI is the percentage of locations where
                                         measurements were taken that meet the
                                         specifications for effective draft temperature
                                         and air velocity.

  **FinishType**                     :   The type of finish for the AirTerminal.

  **FinishColor**                    :   The finish color for the air terminal.

  **MountingType**                   :   The way the AirTerminal is mounted to the
                                         ceiling, wall, etc.

  **FaceType**                       :   Identifies how the terminal face of an
                                         AirTerminal is constructed.

  **CoreType**                       :   Identifies the way the core of the AirTerminal is
                                         constructed.

  **CoreSetVertical**                :   Degree of blade set from the centerline.

  **CoreSetHorizontal**              :   Degree of blade set from the centerline.

  **IntegralControl**                :   If TRUE, a self powered temperature control is
                                         included in the AirTerminal.
  ---------------------------------- --- -------------------------------------------------

[]{#IfcAirTerminalBox .anchor}

**[IfcAirTerminalBox]{.underline}**

[Definition from IAI]{.underline}: This class defines properties of an
air terminal box, which participates in an HVAC duct distribution
system. An air terminal box is typically used to control or modulate the
amount of air delivered to its downstream ductwork.

  --------------------- --- -----------------------------------------------------
  **TerminalBoxType**   :   Enumeration that identifies the type of terminal box
                            (e.g., VariableAirVolume, ConstantVolume,
                            VariableAirVolumeReheat, ConstantVolumeReheat,
                            FanPowered, VariableAirVolumeDualDuct, etc.)

  **SoundLevel**        :   Design sound power level defined in decibels with a
                            reference quantity of picowatts.
  --------------------- --- -----------------------------------------------------

[]{#IfcBoiler .anchor}**[IfcBoiler]{.underline}**

[Definition from IAI]{.underline}: An *IfcBoiler* is a device which
converts stored energy to heat which is added to a fluid; typically used
to heat water.

[Attribute definitions:]{.underline}

  --------------------- --- ---------------------------------------------------------
  **BoilerType**        :   Defines boiler types by heat transfer medium.

  **HeatOutput**        :   Total nominal heat output as listed by the Boiler
                            manufacturer.

  **PressureRating**    :   Nominal pressure rating of the boiler as rated by ASME
                            Boiler and Pressure Vessel Code Section IV, Rules for
                            Construction of Heating Boilers, and Section I, Rules for
                            Construction of Power Boilers.

  **EnergyInputRate**   :   Nominal fuel consumption rate required to produce the
                            total boiler heat output.
  --------------------- --- ---------------------------------------------------------

[]{#IfcChiller .anchor}**[IfcChiller]{.underline}**

[Definition from IAI]{.underline}: An *IfcChiller* is a device used to
implement a refrigeration cycle for cooling a fluid.

  ------------------------------ --- -------------------------------------------------
  **ChillerType**                :   Defines the typical types of chillers (e.g.,
                                     air-cooled, water-cooled, etc.).

  **NominalCoolingCapacity\_**   :   Nominal cooling capacity of chiller at
                                     standardized conditions per ARI Standards 550-92,
                                     Centrifugal and Rotary Screw Water-Chilling
                                     Packages, and ARI Standards 590-92, Positive
                                     Displacement Compressor.
  ------------------------------ --- -------------------------------------------------

[]{#IfcCoil .anchor}**[IfcCoil]{.underline}**

[Definition from IAI]{.underline}: An *IfcCoil* is a device used to
provide heat transfer between non-mixing media. This is typically used
in conjunction with an AirHandler or PackagedACUnit and often will use a
TubeBundle.

  --------------------- --- -------------------------------------------------------
  **CoilType**          :   Defines typical types of coils (e.g., Cooling, Heating,
                            etc.)

  **BypassFactor**      :   Coil bypass factor

  **FaceVelocity**      :   Air velocity through the coil.

  **FlowArrangement**   :   Coil flow arrangement.
  --------------------- --- -------------------------------------------------------

[]{#IfcCompressor .anchor}**[IfcCompressor]{.underline}**

[Definition from IAI]{.underline}: An *IfcCompressor* is a device that
compresses a fluid typically used in a refrigeration circuit.

[Attribute definitions:]{.underline}

  -------------------- --- -------------------------------------------------------
  **CompressorType**   :   Defines the type of compressor (e.g., hermetic,
                           reciprocating, etc.).

  **HotGasBypass**     :   Whether or not hot gas bypass is provided for the
                           compressor. TRUE = Yes, FALSE = No.
  -------------------- --- -------------------------------------------------------

[]{#IfcControlElement .anchor}**[IfcControlElement]{.underline}**

[Definition from IAI]{.underline}: This class defines elements of a
building automation control system that are used to impart control over
elements of a distribution system.

This class defines elements of a building automation control system.
These are typically used to control distribution system elements to
maintain temperature, humidity, pressure, flow, power, lighting levels,
etc., through the modulation, staging or sequencing of mechanical or
electrical devices. The three general functional categories of
ControlElements as defined for this release of the IFC model are as
follows:

-   Impart control over flow control elements (*IfcFlowController*) in a
    distribution system such as dampers, valves, relays, etc., typically
    through the use of actuation (*IfcActuator*: See *IfcHvacDomain*
    schema).

-   Sensing elements (*IfcSensor*: See *IfcHvacDomain* schema) that
    measure changes in the controlled variable (e.g., temperature,
    humidity, pressure, flow, etc.).

-   Controllers (*IfcController*: See *IfcHvacDomain* schema) typically
    classified according to the control action they seek to perform and
    generally responsible for making decisions about the elements under
    control.

Since this class and its subtypes typically relate to many different
distribution flow elements (*IfcDistributionFlowElement*), the
objectified relationship *IfcRelFlowControlElements* has been provided
to relate control and flow elements as required.

[Attribute definitions:]{.underline}

  --------------------------- --- -------------------------------------------------
  **ControlElementId**        :   The ControlElement Point Identification assigned
                                  to this control element by the Building
                                  Automation System.

  **AssignedToFlowElement**   :   Reference to the relationship object, that
                                  related distribution flow elements.
  --------------------------- --- -------------------------------------------------

[]{#IfcController .anchor}**[IfcController]{.underline}**

[Definition from IAI]{.underline}: This class defines properties of a
controller which interacts with other devices in a control system such
as a building automation control system.

An *IfcController* typically has a relationship with an *IfcSensor*
and/or an *IfcActuator*. These relationships can be handled either
through aggregation (e.g., a unitized controller/actuator assembly)
using the *IfcRelAssemblesElements* objectified relationship or simply
as an arbitrary grouping of related devices using the *IfcRelGroups*
objectified relationship.

[]{#IfcCoolingTower .anchor}**[IfcCoolingTower]{.underline}**

[Definition from IAI]{.underline}: An *IfcCoolingTower* is a device
which rejects heat to ambient air.

[Attribute definitions:]{.underline}

  ------------------------------ --- -----------------------------------------------
  **CoolingTowerType**           :   Defines the typical types of cooling towers
                                     (e.g., OpenTower, ClosedTower, CrossFlow,
                                     etc.).

  **AmbientDesignTemperature**   :   Ambient design temperature used for selecting
                                     the cooling tower; for air the list consists of
                                     dry bulb temperature followed by wet bulb
                                     temperature.
  ------------------------------ --- -----------------------------------------------

[]{#IfcDamper .anchor}**[IfcDamper]{.underline}**

[Definition from IAI]{.underline}: This class defines elements of a
damper, which typically is used in an HVAC air distribution system to
control or modulate the flow of air.

An *IfcActuator* can be either aggregated into the definition of the
*IfcDamper* using the *IfcRelAssemblesElements* relationship, or
referenced using the *IfcRelConnectsElements* objectified relationship.

[Attribute definitions:]{.underline}

  ------------------------ --- ---------------------------------------------------
  **PredefinedType**       :   Predefined generic types are specified in an
                               Enumeration. A TypeDefinition is available for each
                               generic type (as the required attributes differ).
                               Use Type Definition corresponding to this generic
                               type.\
                               \
                               Type Definitions\
                               Type driven PropertySets\
                               PreDefined Type Associated PropertySet\
                               FireDamper Pset_FireDamper\
                               SmokeDamper Pset_SmokeDamper\
                               FireSmokeDamper Pset_FireSmokeDamper\
                               BackdraftDamper Pset_BackdraftDamper\
                               ControlDamper Pset_ControlDamper\
                               Louver Pset_Louver\
                               UserDefined\
                               NotDefined

  **FrameDepth**           :   The length (or depth) of the damper frame.

  **SizingMethod**         :   Enumeration that identifies whether the damper is
                               sized nominally or with exact measurements.

  **CloseOffRating**       :   Close off rating.

  **LeakageAirFlowRate**   :   Leakage air flow rate: the volume of air that still
                               passes through a fully closed damper.

  **PercentOpen**          :   Defines the percentage open position for the damper
                               blades. This value varies for dampers under
                               automatic control, but typically remain fixed for
                               dampers used for balancing purposes.
  ------------------------ --- ---------------------------------------------------

[]{#IfcDiscreteElement .anchor}[IfcDiscreteElement]{.underline}

Definition from IAI: This class defines elements in a building services
system that do not participate as either devices or distribution
elements, such as insulation or attaching elements. This class will be
more fully elaborated in future IFC releases.

HISTORY: New entity in IFC R2.0.

ISSUES: See issues and change log for changes made in IFC R2x.

Geometry Use Definitions

The geometric representation of IfcDiscreteElement is given by the
IfcProductDefinitionShape, allowing multiple geometric representations.
Included are:

B-Rep Representation

The faceted B-Rep capabilities (with or without voids) shall be
supported for B-Rep representation.

Attribute definitions:

PredefinedType : Predefined generic types are specified in an
Enumeration. A TypeDefinition is available for each generic type (as the
required attributes differ). Use Type Definition corresponding to this
generic type.

Type Definitions

Type driven PropertySets

PreDefined Type Associated PropertySet

Insulation Pset_Insulation

UserDefined

NotDefined

[]{#IfcDistributionFlowElement
.anchor}**[IfcDistributionFlowElement]{.underline}**

**[SUPERTYPE OF (ONEOF(IfcFlowController, IfcFlowFitting,
IfcFlowSegment, IfcFlowTerminal, IfcHeatTransferDevice,
IfcFluidMovingDevice, IfcTreatmentDevice,
IfcStorageDevice))]{.underline}**

**[SUBTYPE OF (IfcDistributionElement);]{.underline}**

[Definition from IAI]{.underline}: This class defines elements of a
distribution system that facilitate the distribution of energy or
matter, such as air, water or power.

[]{#IfcFan .anchor}**[IfcFan]{.underline}**

[Definition from IAI]{.underline}: An *IfcFan* is a device which imparts
mechanical work on a gas.

[Attribute definitions:]{.underline}

  --------------------------- --- ---------------------------------------------------
  **AirFlowType**             :   Enumeration of possible Fan AirFlow types (e.g.,
                                  Supply, Return, Exhaust, etc.).

  **StaticPressure**          :   The static pressure within the air stream that the
                                  fan must overcome to insure designed circulation of
                                  air.

  **FanPressureClass**        :   Defines the Pressure Class of the fan used for
                                  identifying the thickness and types of materials
                                  required for the construction of the fan assembly.

  **FanWheelType**            :   Defines the type of wheel typically utilized in
                                  fans.

  **WheelMaterial**           :   The material used to construct the fan wheel.

  **WheelTipSpeed**           :   The linear speed of the tip of the fan blade
                                  furthest from the shaft.

  **DischargeVelocity**       :   The speed at which air discharges from the fan
                                  through the fan housing discharge opening.

  **HousingMaterial**         :   The material used to construct the fan housing.

  **DischargePressureLoss**   :   Fan discharge pressure losses associated with the
                                  discharge arrangement.

  **FanDischargeType**        :   Defines the type of discharge arrangement from the
                                  fan housing discharge opening, which is used to
                                  determine the DischargePressureLoss

  **FanArrangement**          :   Defines the type of fan arrangement for centrifugal
                                  fans.

  **FanRotation**             :   Defines the types of fan rotation for centrifugal
                                  fans.

  **FanDriveArrangement**     :   Defines the fan and motor drive arrangement as
                                  defined by AMCA.

  **DrivePowerLoss\_**        :   Fan drive power losses associated with the type of
                                  connection between the motor and the fan wheel.

  **MotorDriveType**          :   Defines the type of connection between the motor
                                  and the fan wheel.

  **MotorInAirstream\_**      :   Boolean value to identify if the fan motor is in
                                  the conditioned airstream. TRUE = Yes, FALSE = No.

  **FanMountingType**         :   Defines the method of mounting the fan in the
                                  building.
  --------------------------- --- ---------------------------------------------------

[]{#IfcFlowController .anchor}**[IfcFlowController]{.underline}**

[Definition from IAI]{.underline}: This class defines elements of a
distribution system that are used to regulate flow through a
distribution system (e.g., damper, valve, switch, relay, etc.).

SUBTYPE OF ( IfcDistributionFlowElement);

[]{#IfcFlowFitting .anchor}**[IfcFlowFitting]{.underline}**

[Definition from IAI]{.underline}: A junction or transition in a flow
distribution system (e.g., elbow, tee, etc.).

SUBTYPE OF ( IfcDistributionFlowElement);

[]{#IfcFlowSegment .anchor}**[IfcFlowSegment]{.underline}**

[Definition from IAI]{.underline}: A segment of a flow distribution
system that is typically straight, contiguous and has two ports (e.g., a
section of pipe or duct).

SUBTYPE OF ( IfcDistributionFlowElement);

[Attribute definitions:]{.underline}

  -------------------- --- -------------------------------------------------------
  **PredefinedType**   :   Predefined generic types are specified in an
                           Enumeration. A TypeDefinition is available for each
                           generic type (as the required attributes differ). Use
                           Type Definition corresponding to this generic type.\
                           \
                           Type Definitions\
                           Type driven PropertySets\
                           PreDefined Type Associated PropertySet\
                           DuctSegment Pset_DuctSegment\
                           PipeSegment Pset_PipeSegment\
                           GutterSegment Pset_GutterSegment\
                           UserDefined\
                           NotDefined

  -------------------- --- -------------------------------------------------------

**[IfcFluidFlowProperties]{.underline}**

[Attribute definitions:]{.underline}

  ------------------------ --- ----------------------------------------------------
  **MaximumFlowRate**      :   Maximum possible flowrate through all inlets.

  **DesignFlowrate**       :   Design or intended flowrate through all inlets.

  **MinimumFlowrate**      :   Minimum flowrate through all the inlets.

  **PressureLoss**         :   Pressure loss at the DesignFlowrate.

  **WorkingPressure**      :   The working pressure, or pressure that is exerted on
                               the inlets.

  **PressureRating**       :   The design pressure rating, or maximum pressure that
                               this device can be subjected to.

  **Fluid**                :   The properties of the fluid.

  **DesignVelocity**       :   Velocity of the fluid at the DesignFlowrate.

  **DesignTemperature**    :   List of design temperature of the fluid; for air the
                               list consists of dry bulb temperature followed by
                               wet bulb temperature.

  **MaximumTemperature**   :   Maximum temperature of the fluid; for air the list
                               consists of dry bulb temperature followed by wet
                               bulb temperature.

  **MinimumTemperature**   :   Minimum temperature of the fluid; for air the list
                               consists of dry bulb temperature followed by wet
                               bulb temperature.

  **WorkingTemperature**   :   Working or actual temperature of the fluid; for air
                               the list consists of dry bulb temperature followed
                               by wet bulb temperature.

  **WorkingQuality**       :   Defines ratio of vapor to liquid.
  ------------------------ --- ----------------------------------------------------

[]{#IfcFluidMovingDevice .anchor}**[IfcFluidMovingDevice]{.underline}**

SUPERTYPE OF (ONEOF(IfcCompressor, IfcFan, IfcPump))

[Definition from IAI]{.underline}: *IfcFluidMovingDevice* is an
apparatus used distribute, circulate or perform conveyance of fluids,
including liquids and gases, and typically participates in a flow
distribution system (e.g., pump, fan).

*IfcFluidMovingDevice* is a container entity that aggregates all
components of the device it represents. The aggregation is handled via
the *IfcRelAssemblesElements* relationship.

[]{#IfcHydronicHeater .anchor}**[IfcHydronicHeater]{.underline}**

[SUBTYPE OF (IfcFlowTerminal);]{.underline}

[Definition from IAI]{.underline}: An *IfcHydronicHeater* is a device
which adds heat to a space utilizing a combination of radiation and
natural convection. The heat source is typically steam or hot water.
Examples of HydronicHeaters include radiators, convectors, baseboard and
finned-tube heaters, etc. The physical dimensions and properties of the
heating element can be defined by an aggregated coil element
(*IfcCoil*).

[Attribute definitions:]{.underline}

  ------------------------ --- ---------------------------------------------------
  **HydronicHeaterType**   :   Enumeration of possible HydronicHeater types (e.g.,
                               baseboard heater, convector, radiator, etc.).

  **HeatOutput**           :   Total nominal heat output as listed by the
                               manufacturer.

  **Enclosure**            :   Description of the the type of enclosure around the
                               HydronicHeater.

  **BodyMass**             :   Overall body mass of a HydronicHeater.

  **NumberOfPanels**       :   Number of panels (panel radiators only).

  **NumberOfSections**     :   Number of vertical sections, measured in the
                               direction of flow.
  ------------------------ --- ---------------------------------------------------

[]{#IfcHygroscopicMaterialProperties
.anchor}**[IfcHygroscopicMaterialProperties]{.underline}**

[Definition from IAI]{.underline}:A container class with material
hygroscopic properties defined in IFC specification.

[Attribute definitions:]{.underline}

  -------------------------------- --- -----------------------------------------
  **UpperVaporResistanceFactor**   :   The vapor permeability relationship of
                                       air/material (typically value \> 1),
                                       measured in high relative humidity
                                       (typically in 95/50 % RH).

  **LowerVaporResistanceFactor**   :   The vapor permeability relationship of
                                       air/material (typically value \> 1),
                                       measured in low relative humidity
                                       (typically in 0/50 % RH).

  **IsothermalMoistureCapacity**   :   Based on water vapor density, usually
                                       measured in \[m3/ kg\].

  **VaporPermeability**            :   Usually measured in \[kg/s m Pa\].

  **MoistureDiffusivity**          :   Usually measured in \[m3/s\].
  -------------------------------- --- -----------------------------------------

[]{#IfcOpticalMaterialProperties
.anchor}**[IfcOpticalMaterialProperties]{.underline}**

[Definition from IAI]{.underline}:A container class with material
optical properties defined in IFC specification.

[Attribute definitions:]{.underline}

  ------------------------------ --- --------------------------------------------------
  **VisibleTransmittance**       :   Transmittance at normal incidence (visible).
                                     Defines the fraction of the visible spectrum of
                                     solar radiation that passes through per unit area,
                                     perpendicular to the surface.

  **SolarTransmittance**         :   Transmittance at normal incidence (solar). Defines
                                     the fraction of solar radiation that passes
                                     through per unit area, perpendicular to the
                                     surface.

  **ThermalIrTransmittance**     :   Thermal IR transmittance at normal incidence.
                                     Defines the fraction of thermal energy that passes
                                     through per unit area, perpendicular to the
                                     surface.

  **ThermalIrEmissivityBack**    :   Thermal IR emissivity: back side. Defines the
                                     fraction of thermal energy emitted per unit area
                                     to \"blackbody\" at the same temperature, through
                                     the \"back\" side of the material.

  **ThermalIrEmissivityFront**   :   Thermal IR emissivity: front side. Defines the
                                     fraction of thermal energy emitted per unit area
                                     to \"blackbody\" at the same temperature, through
                                     the \"front\" side of the material.

  **VisibleReflectanceBack**     :   Reflectance at normal incidence (visible): back
                                     side. Defines the fraction of the solar ray in the
                                     visible spectrum that is reflected and not
                                     transmitted when the ray passes from one medium\
                                     into another, at the \"back\" side of the other
                                     material, perpendicular to the surface. Dependent
                                     on material and surface characteristics.

  **VisibleReflectanceFront**    :   Reflectance at normal incidence (visible): front
                                     side. Defines the fraction of the solar ray in the
                                     visible spectrum that is reflected and not
                                     transmitted when the ray passes from one medium\
                                     into another, at the \"front\" side of the other
                                     material, perpendicular to the surface. Dependent
                                     on material and surface characteristics.

  **SolarReflectanceFront**      :   Reflectance at normal incidence (solar): front
                                     side. Defines the fraction of the solar ray that
                                     is reflected and not transmitted when the ray
                                     passes from one medium into another, at the
                                     \"front\" side of the other material,
                                     perpendicular to the surface. Dependent on
                                     material and surface characteristics.

  **SolarReflectanceBack**       :   Reflectance at normal incidence (solar): back
                                     side. Defines the fraction of the solar ray that
                                     is reflected and not transmitted when the ray
                                     passes from one medium into another, at the
                                     \"back\" side of the other material, perpendicular
                                     to the surface. Dependent on material and surface
                                     characteristics.
  ------------------------------ --- --------------------------------------------------

[]{#IfcPump .anchor}**[IfcPump]{.underline}**

SUBTYPE OF (IfcFluidMovingDevice);

[Definition from IAI]{.underline}: An *IfcPump* is a device which
imparts mechanical work on a liquid.

[Attribute definitions:]{.underline}

  ---------------------------- --- --------------------------------------------------
  **PumpType**                 :   Defines the type of centrifugal pump typically
                                   used in building services.

  **NetPositiveSuctionHead**   :   Minimum liquid pressure at pump inlet to prevent
                                   cavitation.

  **ImpellerSealMaterial**     :   The material used for the impeller shaft seals.

  **PumpBaseType**             :   Defines the type of base used for centrifugal
                                   pumps.

  **MotorDriveType**           :   Defines the type of connection between the motor
                                   and the pump impeller.
  ---------------------------- --- --------------------------------------------------

[]{#IfcSanitaryTerminal .anchor}**[IfcSanitaryTerminal]{.underline}**

[SUBTYPE OF (IfcFlowTerminal);]{.underline}

[Definition from IAI]{.underline}: An *IfcSanitaryTerminal* is an
*IfcFlowTerminal* specialized for use in sanitary plumbing applications
(e.g., water closets, sinks, etc.).

[Attribute definitions:]{.underline}

  -------------------- --- ----------------------------------------------------------
  **PredefinedType**   :   Predefined generic types are specified in an Enumeration.
                           A TypeDefinition is available for each generic type (as
                           the required attributes differ). Use Type Definition
                           corresponding to this generic type.\
                           \
                           Type Definitions\
                           Type driven PropertySets\
                           PreDefined Type Associated PropertySet\
                           RoofDrain Pset_RoofDrain\
                           Scupper Pset_Scupper\
                           Faucet Pset_Faucet\
                           Sink Pset_Sink\
                           Toilet Pset_Toilet\
                           Urinal Pset_Urinal\
                           Shower Pset_Shower\
                           UserDefined\
                           NotDefined

  -------------------- --- ----------------------------------------------------------

[]{#IfcSensor .anchor}**[IfcSensor]{.underline}**

[Definition from IAI]{.underline}: This class defines properties of a
sensor which is used for detection in a control system such as a
building automation control system.

[Attribute definitions:]{.underline}

  -------------------- --- -----------------------------------------------------------
  **PredefinedType**   :   Predefined generic types are specified in an Enumeration. A
                           TypeDefinition is available for each generic type (as the
                           required attributes differ). Use Type Definition
                           corresponding to this generic type.\
                           \
                           Type Definitions\
                           Type driven PropertySets\
                           PreDefined Type Associated PropertySet\
                           HvacSensor Pset_HvacSensor\
                           UserDefined\
                           NotDefined

  -------------------- --- -----------------------------------------------------------

[]{#IfcSpaceThermalLoad .anchor}**[IfcSpaceThermalLoad]{.underline}**

[Definition from IAI]{.underline}: The space thermal load
(*IfcSpaceThermalLoad*) defines all thermal losses and gains occurring
within a space or zone. Those losses or gains can either be requirements
(desired values) or criteria (actual values). The source attribute
defines the source of loss or gain, and the maximum value and applicable
value ratio are interpreted according to the source (see definition of
IfcUseCaseSourceEnum).

The *IfcSpaceThermalLoad* is a statically defined property set and
should be attached to the instance(s) of *IfcSpace* through the
*IfcRelAssignsProperties* relationship. If there are

several different thermal loads occuring within a space, multiple
instances of *IfcSpaceThermalLoad* should be assigned.

[Attribute definitions:]{.underline}

  --------------------------- --- ----------------------------------------------------
  **ApplicableValueRatio**    :   Percentage of use requirement or criteria applicable
                                  to the space, interpretation depends on the source
                                  type.

  **ThermalLoadSource**       :   Source or type of the use or load characteristic.
                                  Depending on the source, the maximum value has to be
                                  interpreted.

  **RequirementOrCriteria**   :   Indicated whether the source values describe a
                                  desired value as requirement (REQUIREMENT) or an
                                  actual value as criteria (CRITERIA) for the space.

  **ConstantLoad**            :   Indication, whether the use requirement or load is
                                  constant during the hours of a day (TRUE) or not
                                  (FALSE). If not, a Pset_24HRSchedule has to be
                                  referenced by ExtendedProperties.

  **LossOrGain**              :   Indicated whether the source causes a loss (LOSS) or
                                  gain (GAIN) for the space.

  **SourceDescription**       :   Further specification for the source, which might be
                                  specific for a region or project. E.g. whether the
                                  heat gain from Person is caused by specific
                                  activities.
  --------------------------- --- ----------------------------------------------------

[]{#IfcTank .anchor}**[IfcTank]{.underline}**

[Definition from IAI]{.underline}: An *IfcTank* is a device used to hold
gasses and liquids; e.g., expansion tank.

[Attribute definitions:]{.underline}

  ------------------------------ --- --------------------------------------------------
  **Volume**                     :   Nominal or design volume of the tank.

  **ReliefValveSetting**         :   Pressure at which the relief valve activates.

  **ChargePressure**             :   Normal operating pressure of the tank.

  **PressureRegulatorSetting**   :   Pressure that is automatically maintained in the
                                     tank.
  ------------------------------ --- --------------------------------------------------

[]{#IfcThermalMaterialProperties
.anchor}**[IfcThermalMaterialProperties]{.underline}**

[Definition from IAI]{.underline}:A container class with material
thermal properties defined in IFC specification.

[Attribute definitions:]{.underline}

  -------------------------- --- ----------------------------------------------------
  **SpecificHeatCapacity**   :   Defines the specific heat of the material: heat
                                 energy absorbed per\
                                 temperature unit. Usually measured in \[J/kg K\].

  **BoilingPoint**           :   The boiling point of the material (fluid). Usually
                                 measured in Kelvin.

  **FreezingPoint**          :   The freezing point of the material (fluid). Usually
                                 measured in Kelvin.

  **ThermalConductivity**    :   The rate at which thermal energy is transmitted
                                 through the material.Usually in \[W/m K\].
  -------------------------- --- ----------------------------------------------------

[]{#IfcTreatmentDevice .anchor}**[IfcTreatmentDevice]{.underline}**

SUBTYPE OF (IfcDistributionFlowElement);

[Definition from IAI]{.underline}: *IfcTreatmentDevice* is a device
typically used to remove unwanted matter from a fluid, either liquid or
gas, and typically participates in a flow distribution system (e.g., air
filter).

[]{#IfcTubeBundle .anchor}**[IfcTubeBundle]{.underline}**

[Definition from IAI]{.underline}: An *IfcTubeBundle* is a device
consisting of tubes and bundles of tubes used for heat transfer and
contained typically within other devices (e.g., *IfcChiller*, *IfcCoil*,
etc.).

An *IfcTubeBundle* will typically aggregate instances of
*IfcFluidFlowProperties* to capture the flowrate and pressure conditions
of the fluids within the tubes and within the shell. For TubeBundles
that use electricity rather than fluids, aggregate an instance of
*IfcElectricalBaseProperties* instead.

[Attribute definitions:]{.underline}

  ----------------------------------- --- ----------------------------------------------
  **TubeSize**                        :   Nominal diameter or width of the tubes in the
                                          TubeBundle.

  **TubeMaterial**                    :   Material used for construction of the tubes.

  **TubeLength**                      :   Length of the tubes in the TubeBundle.

  **TubeSpacing**                     :   Spacing between tubes in the TubeBundle.

  **TubeFluidEnteringTemperature**    :   List of design temperatures of the fluid
                                          entering the tubes; for air the list consists
                                          of dry bulb temperature followed by wet bulb
                                          temperature.

  **TubeFluidLeavingTemperature**     :   List of design temperatures of the fluid
                                          leaving the tubes; for air the list consists
                                          of dry bulb temperature followed by wet bulb
                                          temperature.

  **FinMaterial**                     :   Material used to construct the fins on a tube
                                          in the TubeBundle.

  **ShellMaterial**                   :   Material used to construct the shell of the
                                          TubeBundle.

  **FinSpacing**                      :   Distance between fins on a tube in the
                                          TubeBundle.

  **TubeFoulingFactor**               :   Fouling factor of the tubes in the TubeBundle.

  **NumberOfTubeCircuits**            :   Number of parallel fluid tube circuits.

  **NumberOfTubeRows**                :   Number of tube rows in the TubeBundle
                                          assembly.

  **ShellFluidLeavingTemperature**    :   List of design temperatures of the fluid
                                          leaving the shell or TubeBundle assembly; for
                                          air the list consists of dry bulb temperature
                                          followed by wet bulb temperature.

  **ShellFluidEnteringTemperature**   :   List of design temperatures of the fluid
                                          entering the shell or TubeBundle assembly; for
                                          air the list consists of dry bulb temperature
                                          followed by wet bulb temperature.
  ----------------------------------- --- ----------------------------------------------

[]{#IfcUnitHeater .anchor}**[IfcUnitHeater]{.underline}**

[SUBTYPE OF (IfcHeatTransferDevice);]{.underline}

[Definition from IAI]{.underline}: An *IfcUnitHeater* is a device which
adds heat to a space.

[]{#IfcValve .anchor}**[IfcValve]{.underline}**

[Definition from IAI]{.underline}: This class defines elements of a
valve, which typically is used in an HVAC piping distribution system to
control or modulate the flow of the fluid.

[Attribute definitions:]{.underline}

  -------------------------- --- -----------------------------------------------------
  **CloseOffRating**         :   Close off rating.

  **ValveFlowCoefficient**   :   Flow coefficient (the quantity of fluid that passes
                                 through a fully open valve at unit pressure drop),
                                 typically expressed as the Kv or Cv value for the
                                 valve.

  **ValveType**              :   Type of valve.
  -------------------------- --- -----------------------------------------------------

[]{#Pset_AggregateLoadInformation
.anchor}[Pset_AggregateLoadInformation]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_AggregateLoadInformation
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: The aggregated thermal loads
                   experienced by one or many spaces or zones. This aggregate
                   load information is typically addressed by a system or
                   plant. HISTORY: New property set in IFC Release 1.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ----------------------------- ------------------------ ------------------------- ----------------
  **Name**                      **Property Type**        **Data Type**             **Definition**

  TotalCoolingLoad              IfcPropertySingleValue   IfcPowerMeasure /         The peak total
                                                         PowerUnit                 cooling load for
                                                                                   the building.

  TotalHeatingLoad              IfcPropertySingleValue   IfcPowerMeasure /         The peak total
                                                         PowerUnit                 heating load for
                                                                                   the building.

  LightingDiversity             IfcPropertySingleValue   IfcPositiveRatioMeasure   Lighting
                                                                                   diversity.

  InfiltrationDiversitySummer   IfcPropertySingleValue   IfcPositiveRatioMeasure   Diversity factor
                                                                                   for Summer
                                                                                   infiltration.

  InfiltrationDiversityWinter   IfcPropertySingleValue   IfcPositiveRatioMeasure   Diversity factor
                                                                                   for Winter
                                                                                   infiltration.

  ApplianceDiversity            IfcPropertySingleValue   IfcPositiveRatioMeasure   Diversity of
                                                                                   applicance load.

  LoadSafetyFactor              IfcPropertySingleValue   IfcPositiveRatioMeasure   Load safety
                                                                                   factor.
  ----------------------------- ------------------------ ------------------------- ----------------

[]{#Pset_AirHandler .anchor}[Pset_AirHandler]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_AirHandler
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Equipment which modifies the
                   psychrometric properties of a controlled air stream. It
                   typically consists of an arrangement of Fans, Coils and
                   AirFilters. HISTORY: New property set in IFC Release 1.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+----------------------+------------------+----------------+----------+
| **Name**             | **Property       | **Data Type**  | **Defi   |
|                      | Type**           |                | nition** |
+----------------------+------------------+----------------+----------+
| AirHan               | IfcPropert       | Pse            | Enu      |
| dlerConstructionEnum | yEnumeratedValue | t_AirHandlerCo | meration |
|                      |                  | nstructionEnum | defining |
|                      |                  |                | how the  |
|                      |                  | -   Ma         | air      |
|                      |                  | nufacturedItem | handler  |
|                      |                  |                | might be |
|                      |                  | -   Con        | fab      |
|                      |                  | structedOnSite | ricated. |
|                      |                  |                |          |
|                      |                  | -   Other      |          |
|                      |                  |                |          |
|                      |                  | -   NotKnown   |          |
|                      |                  |                |          |
|                      |                  | -   Unset      |          |
+----------------------+------------------+----------------+----------+
| AirHandlerFa         | IfcPropert       | Pset_AirH      | Enu      |
| nCoilArrangementEnum | yEnumeratedValue | andlerFanCoilA | meration |
|                      |                  | rrangementEnum | defining |
|                      |                  |                | the      |
|                      |                  | -              | arr      |
|                      |                  |    BlowThrough | angement |
|                      |                  |                | of the   |
|                      |                  | -              | supply   |
|                      |                  |    DrawThrough | air fan  |
|                      |                  |                | and the  |
|                      |                  | -   Other      | cooling  |
|                      |                  |                | coil.    |
|                      |                  | -   NotKnown   |          |
|                      |                  |                |          |
|                      |                  | -   Unset      |          |
+----------------------+------------------+----------------+----------+
| DualDeck             | IfcPro           | IfcBoolean     | Does the |
|                      | pertySingleValue |                | Ai       |
|                      |                  |                | rHandler |
|                      |                  |                | have a   |
|                      |                  |                | dual     |
|                      |                  |                | deck?    |
|                      |                  |                | TRUE =   |
|                      |                  |                | Yes,     |
|                      |                  |                | FALSE =  |
|                      |                  |                | No.      |
+----------------------+------------------+----------------+----------+

[]{#Pset_AirSideSystemInformation
.anchor}[Pset_AirSideSystemInformation]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_AirSideSystemInformation
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Attributes that apply to an air side
                   HVAC system. HISTORY: New property set in IFC Release 1.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+--------------------+---------------+------------------------+--------+
| **Name**           | **Property    | **Data Type**          | **     |
|                    | Type**        |                        | Defini |
|                    |               |                        | tion** |
+--------------------+---------------+------------------------+--------+
| Name               | IfcProper     | IfcString              | The    |
|                    | tySingleValue |                        | name   |
|                    |               |                        | of the |
|                    |               |                        | air    |
|                    |               |                        | side   |
|                    |               |                        | system |
+--------------------+---------------+------------------------+--------+
| Description        | IfcProper     | IfcString              | The    |
|                    | tySingleValue |                        | descr  |
|                    |               |                        | iption |
|                    |               |                        | of the |
|                    |               |                        | air    |
|                    |               |                        | side   |
|                    |               |                        | system |
+--------------------+---------------+------------------------+--------+
| Air                | IfcPropertyEn | Pset                   | This   |
| SideSystemTypeEnum | umeratedValue | _AirSideSystemTypeEnum | enume  |
|                    |               |                        | ration |
|                    |               | -   ConstantVolume     | spe    |
|                    |               |                        | cifies |
|                    |               | -   Co                 | the    |
|                    |               | nstantVolumeSingleZone | basic  |
|                    |               |                        | types  |
|                    |               | -   ConstantVo         | of     |
|                    |               | lumeMultipleZoneReheat | po     |
|                    |               |                        | ssible |
|                    |               | -                      | air    |
|                    |               |   ConstantVolumeBypass | side   |
|                    |               |                        | s      |
|                    |               | -   VariableAirVolume  | ystems |
|                    |               |                        | (e.g., |
|                    |               | -   V                  | Co     |
|                    |               | ariableAirVolumeReheat | nstant |
|                    |               |                        | V      |
|                    |               | -   Vari               | olume, |
|                    |               | ableAirVolumeInduction | Va     |
|                    |               |                        | riable |
|                    |               | -   Varia              | V      |
|                    |               | bleAirVolumeFanPowered | olume, |
|                    |               |                        | etc.)  |
|                    |               | -   Variab             |        |
|                    |               | leAirVolumeDualConduit |        |
|                    |               |                        |        |
|                    |               | -   VariableAirV       |        |
|                    |               | olumeVariableDiffusers |        |
|                    |               |                        |        |
|                    |               | -   VariableAirVol     |        |
|                    |               | umeVariableTemperature |        |
|                    |               |                        |        |
|                    |               | -   Other              |        |
|                    |               |                        |        |
|                    |               | -   NotKnown           |        |
|                    |               |                        |        |
|                    |               | -   Unset              |        |
+--------------------+---------------+------------------------+--------+
| AirSideSystemDi    | IfcPropertyEn | Pset_AirSideSyst       | This   |
| stributionTypeEnum | umeratedValue | emDistributionTypeEnum | enume  |
|                    |               |                        | ration |
|                    |               | -   SingleDuct         | d      |
|                    |               |                        | efines |
|                    |               | -   DualDuct           | the    |
|                    |               |                        | basic  |
|                    |               | -   Multizone          | types  |
|                    |               |                        | of air |
|                    |               | -   Other              | side   |
|                    |               |                        | s      |
|                    |               | -   NotKnown           | ystems |
|                    |               |                        | (e.g., |
|                    |               | -   Unset              | Singl  |
|                    |               |                        | eDuct, |
|                    |               |                        | Dua    |
|                    |               |                        | lDuct, |
|                    |               |                        | Mult   |
|                    |               |                        | izone, |
|                    |               |                        | etc.)  |
+--------------------+---------------+------------------------+--------+
| TotalAirflow       | IfcProper     | IfcVol                 | The    |
|                    | tySingleValue | umetricFlowRateMeasure | total  |
|                    |               | /                      | design |
|                    |               | VolumetricFlowrateUnit | supply |
|                    |               |                        | air    |
|                    |               |                        | fl     |
|                    |               |                        | owrate |
|                    |               |                        | re     |
|                    |               |                        | quired |
|                    |               |                        | for    |
|                    |               |                        | the    |
|                    |               |                        | system |
|                    |               |                        | for    |
|                    |               |                        | either |
|                    |               |                        | h      |
|                    |               |                        | eating |
|                    |               |                        | or     |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | condi  |
|                    |               |                        | tions, |
|                    |               |                        | whi    |
|                    |               |                        | chever |
|                    |               |                        | is     |
|                    |               |                        | gr     |
|                    |               |                        | eater. |
+--------------------+---------------+------------------------+--------+
| EnergyGainTotal    | IfcProper     | IfcPowerMeasure /      | The    |
|                    | tySingleValue | PowerUnit              | total  |
|                    |               |                        | amount |
|                    |               |                        | of     |
|                    |               |                        | energy |
|                    |               |                        | gains  |
|                    |               |                        | for    |
|                    |               |                        | the    |
|                    |               |                        | spaces |
|                    |               |                        | served |
|                    |               |                        | by the |
|                    |               |                        | system |
|                    |               |                        | during |
|                    |               |                        | the    |
|                    |               |                        | peak   |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | condi  |
|                    |               |                        | tions, |
|                    |               |                        | plus   |
|                    |               |                        | any    |
|                    |               |                        | system |
|                    |               |                        | -level |
|                    |               |                        | total  |
|                    |               |                        | energy |
|                    |               |                        | gains. |
+--------------------+---------------+------------------------+--------+
| AirflowSensible    | IfcProper     | IfcVol                 | The    |
|                    | tySingleValue | umetricFlowRateMeasure | air    |
|                    |               | /                      | fl     |
|                    |               | VolumetricFlowrateUnit | owrate |
|                    |               |                        | re     |
|                    |               |                        | quired |
|                    |               |                        | to     |
|                    |               |                        | s      |
|                    |               |                        | atisfy |
|                    |               |                        | the    |
|                    |               |                        | se     |
|                    |               |                        | nsible |
|                    |               |                        | peak   |
|                    |               |                        | loads. |
+--------------------+---------------+------------------------+--------+
| EnergyGainSensible | IfcProper     | IfcPowerMeasure /      | The    |
|                    | tySingleValue | PowerUnit              | sum of |
|                    |               |                        | total  |
|                    |               |                        | energy |
|                    |               |                        | gains  |
|                    |               |                        | for    |
|                    |               |                        | the    |
|                    |               |                        | spaces |
|                    |               |                        | served |
|                    |               |                        | by the |
|                    |               |                        | system |
|                    |               |                        | during |
|                    |               |                        | the    |
|                    |               |                        | peak   |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | condi  |
|                    |               |                        | tions, |
|                    |               |                        | plus   |
|                    |               |                        | any    |
|                    |               |                        | system |
|                    |               |                        | -level |
|                    |               |                        | se     |
|                    |               |                        | nsible |
|                    |               |                        | energy |
|                    |               |                        | gains. |
+--------------------+---------------+------------------------+--------+
| CoolingC           | IfcProper     | IfcThermodyn           | The    |
| oilEnteringDryBulb | tySingleValue | amicTemperatureMeasure | system |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | coil   |
|                    |               |                        | en     |
|                    |               |                        | tering |
|                    |               |                        | dry    |
|                    |               |                        | bulb   |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | at the |
|                    |               |                        | peak   |
+--------------------+---------------+------------------------+--------+
| CoolingC           | IfcProper     | IfcThermodyn           | The    |
| oilEnteringWetBulb | tySingleValue | amicTemperatureMeasure | system |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | coil   |
|                    |               |                        | en     |
|                    |               |                        | tering |
|                    |               |                        | wet    |
|                    |               |                        | bulb   |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | at the |
|                    |               |                        | peak   |
+--------------------+---------------+------------------------+--------+
| Cooling            | IfcProper     | IfcThermodyn           | The    |
| CoilLeavingDryBulb | tySingleValue | amicTemperatureMeasure | system |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | coil   |
|                    |               |                        | en     |
|                    |               |                        | tering |
|                    |               |                        | dry    |
|                    |               |                        | bulb   |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | at the |
|                    |               |                        | peak   |
+--------------------+---------------+------------------------+--------+
| Cooling            | IfcProper     | IfcThermodyn           | The    |
| CoilLeavingWetBulb | tySingleValue | amicTemperatureMeasure | system |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | coil   |
|                    |               |                        | en     |
|                    |               |                        | tering |
|                    |               |                        | wet    |
|                    |               |                        | bulb   |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | at the |
|                    |               |                        | peak   |
+--------------------+---------------+------------------------+--------+
| EnergyLoss         | IfcProper     | IfcPowerMeasure /      | The    |
|                    | tySingleValue | PowerUnit              | sum of |
|                    |               |                        | energy |
|                    |               |                        | losses |
|                    |               |                        | for    |
|                    |               |                        | the    |
|                    |               |                        | spaces |
|                    |               |                        | served |
|                    |               |                        | by the |
|                    |               |                        | system |
|                    |               |                        | during |
|                    |               |                        | the    |
|                    |               |                        | peak   |
|                    |               |                        | h      |
|                    |               |                        | eating |
|                    |               |                        | condi  |
|                    |               |                        | tions. |
+--------------------+---------------+------------------------+--------+
| LightingDiversity  | IfcProper     | I                      | Li     |
|                    | tySingleValue | fcPositiveRatioMeasure | ghting |
|                    |               |                        | dive   |
|                    |               |                        | rsity. |
+--------------------+---------------+------------------------+--------+
| Infiltrat          | IfcProper     | I                      | Div    |
| ionDiversitySummer | tySingleValue | fcPositiveRatioMeasure | ersity |
|                    |               |                        | factor |
|                    |               |                        | for    |
|                    |               |                        | Summer |
|                    |               |                        | i      |
|                    |               |                        | nfiltr |
|                    |               |                        | ation. |
+--------------------+---------------+------------------------+--------+
| Infiltrat          | IfcProper     | I                      | Div    |
| ionDiversityWinter | tySingleValue | fcPositiveRatioMeasure | ersity |
|                    |               |                        | factor |
|                    |               |                        | for    |
|                    |               |                        | Winter |
|                    |               |                        | i      |
|                    |               |                        | nfiltr |
|                    |               |                        | ation. |
+--------------------+---------------+------------------------+--------+
| ApplianceDiversity | IfcProper     | I                      | Div    |
|                    | tySingleValue | fcPositiveRatioMeasure | ersity |
|                    |               |                        | of     |
|                    |               |                        | appl   |
|                    |               |                        | icance |
|                    |               |                        | load.  |
+--------------------+---------------+------------------------+--------+
| LoadSafetyFactor   | IfcProper     | I                      | Load   |
|                    | tySingleValue | fcPositiveRatioMeasure | safety |
|                    |               |                        | f      |
|                    |               |                        | actor. |
+--------------------+---------------+------------------------+--------+
| Heati              | IfcProper     | IfcThermodyn           | H      |
| ngTemperatureDelta | tySingleValue | amicTemperatureMeasure | eating |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | diff   |
|                    |               |                        | erence |
|                    |               |                        | for    |
|                    |               |                        | calcu  |
|                    |               |                        | lating |
|                    |               |                        | space  |
|                    |               |                        | air    |
|                    |               |                        | flow   |
|                    |               |                        | rates  |
+--------------------+---------------+------------------------+--------+
| Cooli              | IfcProper     | IfcThermodyn           | C      |
| ngTemperatureDelta | tySingleValue | amicTemperatureMeasure | ooling |
|                    |               |                        | tempe  |
|                    |               |                        | rature |
|                    |               |                        | diff   |
|                    |               |                        | erence |
|                    |               |                        | for    |
|                    |               |                        | calcu  |
|                    |               |                        | lating |
|                    |               |                        | space  |
|                    |               |                        | air    |
|                    |               |                        | flow   |
|                    |               |                        | rates  |
+--------------------+---------------+------------------------+--------+
| Ventilation        | IfcProper     | IfcVol                 | Re     |
|                    | tySingleValue | umetricFlowRateMeasure | quired |
|                    |               | /                      | o      |
|                    |               | VolumetricFlowrateUnit | utside |
|                    |               |                        | air    |
|                    |               |                        | ventil |
|                    |               |                        | ation. |
+--------------------+---------------+------------------------+--------+
| FanPower           | IfcProper     | IfcPowerMeasure /      | Fan    |
|                    | tySingleValue | PowerUnit              | motor  |
|                    |               |                        | loads  |
|                    |               |                        | contri |
|                    |               |                        | buting |
|                    |               |                        | to the |
|                    |               |                        | c      |
|                    |               |                        | ooling |
|                    |               |                        | load.  |
+--------------------+---------------+------------------------+--------+

[]{#Pset_BackdraftDamper .anchor}[Pset_BackdraftDamper]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_BackdraftDamper
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     BackdraftDamper

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a backdraft damper. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ---------------- ----------------------
  **Name**         **Property Type**        **Data Type**    **Definition**

  FrameType        IfcPropertySingleValue   IfcString        The type of frame used
                                                             by the damper (e.g.,
                                                             Standard, Single
                                                             Flange, Single
                                                             Reversed Flange,
                                                             Double Flange, etc.)
  ---------------- ------------------------ ---------------- ----------------------

[]{#Pset_ControlDamper .anchor}[Pset_ControlDamper]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_ControlDamper
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     ControlDamper

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a control damper. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+--------------+-------------------+---------------+------------------+
| **Name**     | **Property Type** | **Data Type** | **Definition**   |
+--------------+-------------------+---------------+------------------+
| Desig        | IfcPr             | IfcReal /     | The design air   |
| nAirVelocity | opertySingleValue | Linea         | velocity for the |
|              |                   | rVelocityUnit | damper assembly  |
+--------------+-------------------+---------------+------------------+
| Bla          | IfcProper         | Pset_DamperBl | Enumeration that |
| deActionEnum | tyEnumeratedValue | adeActionEnum | identifies the   |
|              |                   |               | blade closing    |
|              |                   | -   Parallel  | action for the   |
|              |                   |               | damper           |
|              |                   | -   Opposed   |                  |
|              |                   |               |                  |
|              |                   | -   Other     |                  |
|              |                   |               |                  |
|              |                   | -   NotKnown  |                  |
|              |                   |               |                  |
|              |                   | -   Unset     |                  |
+--------------+-------------------+---------------+------------------+
| BladeType    | IfcPr             | IfcString     | The type of      |
|              | opertySingleValue |               | blade used in    |
|              |                   |               | the damper       |
|              |                   |               | (e.g., Triple    |
|              |                   |               | Vee, Fabricated  |
|              |                   |               | Airfoil,         |
|              |                   |               | Extruded         |
|              |                   |               | Airfoil, etc.)   |
+--------------+-------------------+---------------+------------------+
| B            | IfcPrope          | IfcMaterial   | The primary      |
| ladeMaterial | rtyReferenceValue |               | material used to |
|              |                   |               | construct the    |
|              |                   |               | damper blade     |
+--------------+-------------------+---------------+------------------+
| Bl           | IfcPr             | Ifc           | The thickness of |
| adeThickness | opertySingleValue | LengthMeasure | the damper blade |
+--------------+-------------------+---------------+------------------+
| FrameType    | IfcPr             | IfcString     | The type of      |
|              | opertySingleValue |               | frame used by    |
|              |                   |               | the damper       |
|              |                   |               | (e.g., Standard, |
|              |                   |               | Single Flange,   |
|              |                   |               | Single Reversed  |
|              |                   |               | Flange, Double   |
|              |                   |               | Flange, etc.)    |
+--------------+-------------------+---------------+------------------+
| F            | IfcPrope          | IfcMaterial   | The primary      |
| rameMaterial | rtyReferenceValue |               | material used to |
|              |                   |               | construct the    |
|              |                   |               | damper frame     |
+--------------+-------------------+---------------+------------------+
| Fr           | IfcPr             | Ifc           | The thickness of |
| ameThickness | opertySingleValue | LengthMeasure | the damper frame |
+--------------+-------------------+---------------+------------------+

[]{#Pset_DuctDesignCriteria
.anchor}[Pset_DuctDesignCriteria]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_DuctDesignCriteria
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: This property set is used to define
                   the general characteristics of the duct design parameters.
                   This property set is typically attached to an instance of
                   an IfcSystem, however, it may also be attached to
                   individual elements within a duct distribution system
                   where individual design parameters overrule those of the
                   system. HISTORY: New property set in IFC Release 2.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+-------------+-------------------+-------------------+---------------+
| **Name**    | **Property Type** | **Data Type**     | *             |
|             |                   |                   | *Definition** |
+-------------+-------------------+-------------------+---------------+
| DesignName  | IfcPr             | IfcString         | A name for    |
|             | opertySingleValue |                   | the design    |
|             |                   |                   | values        |
+-------------+-------------------+-------------------+---------------+
| DuctSizin   | IfcProper         | Pset_Duc          | Enumeration   |
| gMethodEnum | tyEnumeratedValue | tSizingMethodEnum | that          |
|             |                   |                   | identifies    |
|             |                   | -                 | the           |
|             |                   |  ConstantFriction | methodology   |
|             |                   |                   | to be used to |
|             |                   | -                 | size system   |
|             |                   |  ConstantPressure | components    |
|             |                   |                   |               |
|             |                   | -   StaticRegain  |               |
|             |                   |                   |               |
|             |                   | -   Other         |               |
|             |                   |                   |               |
|             |                   | -   NotKnown      |               |
|             |                   |                   |               |
|             |                   | -   Unset         |               |
+-------------+-------------------+-------------------+---------------+
| Pr          | IfcPr             | I                 | Nominal       |
| essureClass | opertySingleValue | fcPressureMeasure | pressure      |
|             |                   | / PressureUnit    | rating of the |
|             |                   |                   | system        |
|             |                   |                   | components.   |
|             |                   |                   | (Data type =  |
|             |                   |                   | Pre           |
|             |                   |                   | ssureMeasure) |
+-------------+-------------------+-------------------+---------------+
| L           | IfcPr             | I                 | Nominal       |
| eakageClass | opertySingleValue | fcPressureMeasure | leakage       |
|             |                   | / PressureUnit    | rating for    |
|             |                   |                   | the system    |
|             |                   |                   | components.   |
+-------------+-------------------+-------------------+---------------+
| F           | IfcPr             | IfcReal /         | The pressure  |
| rictionLoss | opertySingleValue | UserDefined       | loss due to   |
|             |                   |                   | friction per  |
|             |                   |                   | unit length.  |
|             |                   |                   | (Data type =  |
|             |                   |                   | Pres          |
|             |                   |                   | sureMeasure/L |
|             |                   |                   | engthMeasure) |
+-------------+-------------------+-------------------+---------------+
| ScrapFactor | IfcPr             | IfcReal           | Sheet metal   |
|             | opertySingleValue |                   | scrap factor  |
+-------------+-------------------+-------------------+---------------+
| DuctSealant | IfcPr             | IfcString         | Type of       |
|             | opertySingleValue |                   | sealant used  |
|             |                   |                   | on the duct   |
|             |                   |                   | and fittings  |
+-------------+-------------------+-------------------+---------------+
| Maxi        | IfcPr             | IfcLine           | The maximum   |
| mumVelocity | opertySingleValue | arVelocityMeasure | design        |
|             |                   | /                 | velocity of   |
|             |                   | L                 | the air in    |
|             |                   | inearVelocityUnit | the duct or   |
|             |                   |                   | fitting.      |
+-------------+-------------------+-------------------+---------------+
| AspectRatio | IfcPr             | IfcReal           | The default   |
|             | opertySingleValue |                   | aspect ratio  |
+-------------+-------------------+-------------------+---------------+
| Mi          | IfcPr             | IfcLengthMeasure  | The minimum   |
| nimumHeight | opertySingleValue |                   | duct height   |
|             |                   |                   | for           |
|             |                   |                   | rectangular,  |
|             |                   |                   | oval or round |
|             |                   |                   | duct          |
+-------------+-------------------+-------------------+---------------+
| M           | IfcPr             | IfcLengthMeasure  | The minimum   |
| inimumWidth | opertySingleValue |                   | duct width    |
|             |                   |                   | for oval or   |
|             |                   |                   | rectangular   |
|             |                   |                   | duct          |
+-------------+-------------------+-------------------+---------------+

[]{#Pset_DuctFitting .anchor}[Pset_DuctFitting]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_DuctFitting
  Name**           

  **Typed**        True

  **TypedClass**   [IfcFlowFitting](#IfcFlowFitting)

  **TypeName**     DuctFitting

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a duct fitting. Related property
                   sets include Pset_DuctDesignCriteria. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ -------------- ----------------------
  **Name**         **Property Type**        **Data Type**  **Definition**

  FittingSubType   IfcPropertySingleValue   IfcString      Subtype of fitting
                                                           (I.e., 5-gore,
                                                           pleated, stamped,
                                                           etc.)
  ---------------- ------------------------ -------------- ----------------------

[]{#Pset_DuctSegment .anchor}[Pset_DuctSegment]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_DuctSegment
  Name**           

  **Typed**        True

  **TypedClass**   [IfcFlowSegment](#IfcFlowSegment)

  **TypeName**     DuctSegment

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a duct segment. Related property
                   sets include Pset_DuctDesignCriteria. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------------- ------------------------ ------------------ ---------------------
  **Name**               **Property Type**        **Data Type**      **Definition**

  FinishedLength         IfcPropertySingleValue   IfcLengthMeasure   The finished length
                                                                     of the duct segment

  LongitudinalSeam       IfcPropertySingleValue   IfcString          The type of seam to
                                                                     be used along the
                                                                     longitudinal axis of
                                                                     the duct segment

  Reinforcement          IfcPropertySingleValue   IfcString          The type of
                                                                     reinforcement used
                                                                     for the duct segment

  ReinforcementSpacing   IfcPropertySingleValue   IfcLengthMeasure   The spacing between
                                                                     reinforcing elements
  ---------------------- ------------------------ ------------------ ---------------------

[]{#Pset_DuctSystemDesignCriteria
.anchor}[Pset_DuctSystemDesignCriteria]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_DuctSystemDesignCriteria
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: This property set is used to define
                   the general characteristics of the duct system and is
                   typically attached to an instance of an IfcSystem.
                   HISTORY: New property set in IFC Release 2.0. ISSUES: No
                   issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+---------------+------------------+-------------------+--------------+
| **Name**      | **Property       | **Data Type**     | **           |
|               | Type**           |                   | Definition** |
+---------------+------------------+-------------------+--------------+
| DuctS         | IfcPropert       | Pset_D            | Enumeration  |
| ystemTypeEnum | yEnumeratedValue | uctSystemTypeEnum | that         |
|               |                  |                   | identifies   |
|               |                  | -                 | the type of  |
|               |                  | VariableAirVolume | system       |
|               |                  |                   |              |
|               |                  | -                 |              |
|               |                  |    ConstantVolume |              |
|               |                  |                   |              |
|               |                  | -   DoubleDuct    |              |
|               |                  |                   |              |
|               |                  | -   Other         |              |
|               |                  |                   |              |
|               |                  | -   NotKnown      |              |
|               |                  |                   |              |
|               |                  | -   Unset         |              |
+---------------+------------------+-------------------+--------------+
| Syst          | IfcPro           | IfcString         | System       |
| emDescription | pertySingleValue |                   | description  |
+---------------+------------------+-------------------+--------------+
| S             | IfcPro           | IfcString         | Physical     |
| ystemLocation | pertySingleValue |                   | description  |
|               |                  |                   | of the part  |
|               |                  |                   | of the       |
|               |                  |                   | building the |
|               |                  |                   | system       |
|               |                  |                   | serves       |
+---------------+------------------+-------------------+--------------+

[Pset_ElectricActuator]{.underline}

[]{#Pset_ElectricActuator .anchor}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_ElectricActuator
  Name**           

  **Typed**        True

  **TypedClass**   [IfcActuator](#IfcActuator)

  **TypeName**     ElectricActuator

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of an electric actuator. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+-------------+-------------------+---------------------+------------+
| **Name**    | **Property Type** | **Data Type**       | **De       |
|             |                   |                     | finition** |
+-------------+-------------------+---------------------+------------+
| Man         | IfcPr             | IfcBoolean          | Identifies |
| ualOverride | opertySingleValue |                     | whether    |
|             |                   |                     | han        |
|             |                   |                     | d-operated |
|             |                   |                     | operation  |
|             |                   |                     | is         |
|             |                   |                     | provided   |
|             |                   |                     | as an      |
|             |                   |                     | override   |
+-------------+-------------------+---------------------+------------+
| InputPower  | IfcPr             | IfcPowerMeasure /   | Maximum    |
|             | opertySingleValue | PowerUnit           | input      |
|             |                   |                     | power      |
|             |                   |                     | r          |
|             |                   |                     | equirement |
+-------------+-------------------+---------------------+------------+
| ElectricA   | IfcProper         | Pset_Elect          | E          |
| ctuatorType | tyEnumeratedValue | ricActuatorTypeEnum | numeration |
|             |                   |                     | that       |
|             |                   | -   MotorDrive      | identifies |
|             |                   |                     | electric   |
|             |                   | -   Magnetic        | actuator   |
|             |                   |                     | as defined |
|             |                   | -   Other           | by its     |
|             |                   |                     | o          |
|             |                   | -   NotKnown        | perational |
|             |                   |                     | principle. |
|             |                   | -   Unset           |            |
+-------------+-------------------+---------------------+------------+

[]{#Pset_FireDamper .anchor}[Pset_FireDamper]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_FireDamper
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     FireDamper

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a fire damper. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+-----------------+------------------+---------------+----------------+
| **Name**        | **Property       | **Data Type** | **Definition** |
|                 | Type**           |               |                |
+-----------------+------------------+---------------+----------------+
| BladeTypeEnum   | IfcPropert       | Ps            | Enumeration    |
|                 | yEnumeratedValue | et_FireDamper | that           |
|                 |                  | BladeTypeEnum | identifies the |
|                 |                  |               | different      |
|                 |                  | -             | types of       |
|                 |                  | ParallelBlade | blades in the  |
|                 |                  |               | fire damper    |
|                 |                  | -   F         |                |
|                 |                  | oldingCurtain |                |
|                 |                  |               |                |
|                 |                  | -   Other     |                |
|                 |                  |               |                |
|                 |                  | -   NotKnown  |                |
|                 |                  |               |                |
|                 |                  | -   Unset     |                |
+-----------------+------------------+---------------+----------------+
| Ac              | IfcPropert       | Pset_F        | Enumeration    |
| tuationTypeEnum | yEnumeratedValue | ireDamperActu | that           |
|                 |                  | ationTypeEnum | identifies the |
|                 |                  |               | different      |
|                 |                  | -   Gravity   | types of       |
|                 |                  |               | dampers        |
|                 |                  | -   Spring    |                |
|                 |                  |               |                |
|                 |                  | -   Other     |                |
|                 |                  |               |                |
|                 |                  | -   NotKnown  |                |
|                 |                  |               |                |
|                 |                  | -   Unset     |                |
+-----------------+------------------+---------------+----------------+
| Cl              | IfcPropert       | Pset_F        | Enumeration    |
| osureRatingEnum | yEnumeratedValue | ireDamperClos | that           |
|                 |                  | ureRatingEnum | identifies the |
|                 |                  |               | closure rating |
|                 |                  | -   Dynamic   | for the damper |
|                 |                  |               |                |
|                 |                  | -   Static    |                |
|                 |                  |               |                |
|                 |                  | -   Other     |                |
|                 |                  |               |                |
|                 |                  | -   NotKnown  |                |
|                 |                  |               |                |
|                 |                  | -   Unset     |                |
+-----------------+------------------+---------------+----------------+
| FireR           | IfcPro           | IfcReal       | Measure of the |
| esistanceRating | pertySingleValue |               | fire           |
|                 |                  |               | resistance     |
|                 |                  |               | rating in      |
|                 |                  |               | hours (e.g.,   |
|                 |                  |               | 1.5 hours, 2   |
|                 |                  |               | hours, etc.).  |
+-----------------+------------------+---------------+----------------+
| Mount           | IfcPropert       | Pset_         | Enumeration    |
| ingPositionEnum | yEnumeratedValue | DamperMountin | that           |
|                 |                  | gPositionEnum | identifies how |
|                 |                  |               | the damper is  |
|                 |                  | -             | mounted in the |
|                 |                  |    Horizontal | building       |
|                 |                  |               |                |
|                 |                  | -   Vertical  |                |
|                 |                  |               |                |
|                 |                  | -   Other     |                |
|                 |                  |               |                |
|                 |                  | -   NotKnown  |                |
|                 |                  |               |                |
|                 |                  | -   Unset     |                |
+-----------------+------------------+---------------+----------------+
| Fusible         | IfcPro           | IfcTherm      | The            |
| LinkTemperature | pertySingleValue | odynamicTempe | temperature    |
|                 |                  | ratureMeasure | that the       |
|                 |                  |               | fusible link   |
|                 |                  |               | melts          |
+-----------------+------------------+---------------+----------------+
| SleeveLength    | IfcPro           | Ifc           | The length of  |
|                 | pertySingleValue | LengthMeasure | the damper     |
|                 |                  |               | sleeve         |
+-----------------+------------------+---------------+----------------+
| SleeveThickness | IfcPro           | Ifc           | The thickness  |
|                 | pertySingleValue | LengthMeasure | of the damper  |
|                 |                  |               | sleeve         |
+-----------------+------------------+---------------+----------------+
| DamperL         | IfcPro           | IfcString     | The location   |
| ocationInSleeve | pertySingleValue |               | within the     |
|                 |                  |               | sleeve where   |
|                 |                  |               | the damper is  |
|                 |                  |               | mounted (e.g., |
|                 |                  |               | Center)        |
+-----------------+------------------+---------------+----------------+

[]{#Pset_FireSmokeDamper .anchor}[Pset_FireSmokeDamper]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_FireSmokeDamper
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     FireSmokeDamper

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a combination fire and smoke
                   damper. HISTORY: New property set in IFC Release 2.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+-----------------+--------------+----------------+-------------------+
| **Name**        | **Property   | **Data Type**  | **Definition**    |
|                 | Type**       |                |                   |
+-----------------+--------------+----------------+-------------------+
| FrameThickness  | IfcPropert   | If             | The thickness of  |
|                 | ySingleValue | cLengthMeasure | the damper frame  |
+-----------------+--------------+----------------+-------------------+
| FireR           | IfcPropert   | IfcReal        | Measure of the    |
| esistanceRating | ySingleValue |                | fire resistance   |
|                 |              |                | rating in hours   |
|                 |              |                | (e.g., 1.5 hours, |
|                 |              |                | 2 hours, etc.).   |
+-----------------+--------------+----------------+-------------------+
| BladeType       | IfcPropert   | IfcString      | The type of blade |
|                 | ySingleValue |                |                   |
+-----------------+--------------+----------------+-------------------+
| Mount           | If           | Pse            | Enumeration that  |
| ingPositionEnum | cPropertyEnu | t_DamperMounti | identifies how    |
|                 | meratedValue | ngPositionEnum | the damper is     |
|                 |              |                | mounted in the    |
|                 |              | -   Horizontal | building          |
|                 |              |                |                   |
|                 |              | -   Vertical   |                   |
|                 |              |                |                   |
|                 |              | -   Other      |                   |
|                 |              |                |                   |
|                 |              | -   NotKnown   |                   |
|                 |              |                |                   |
|                 |              | -   Unset      |                   |
+-----------------+--------------+----------------+-------------------+
| Fusible         | IfcPropert   | IfcThe         | The temperature   |
| LinkTemperature | ySingleValue | rmodynamicTemp | that the fusible  |
|                 |              | eratureMeasure | link melts        |
+-----------------+--------------+----------------+-------------------+
| ControlType     | IfcPropert   | IfcString      | The type of       |
|                 | ySingleValue |                | control used to   |
|                 |              |                | operate the       |
|                 |              |                | damper (e.g.,     |
|                 |              |                | Open/Closed       |
|                 |              |                | Indicator,        |
|                 |              |                | Resetable         |
|                 |              |                | Temperature       |
|                 |              |                | Sensor,           |
|                 |              |                | Temperature       |
|                 |              |                | Override, etc.)   |
+-----------------+--------------+----------------+-------------------+
| SleeveLength    | IfcPropert   | If             | The length of the |
|                 | ySingleValue | cLengthMeasure | damper sleeve     |
+-----------------+--------------+----------------+-------------------+
| SleeveThickness | IfcPropert   | If             | The thickness of  |
|                 | ySingleValue | cLengthMeasure | the damper sleeve |
+-----------------+--------------+----------------+-------------------+
| DamperL         | IfcPropert   | IfcString      | The location      |
| ocationInSleeve | ySingleValue |                | within the sleeve |
|                 |              |                | where the damper  |
|                 |              |                | is mounted (e.g., |
|                 |              |                | Center)           |
+-----------------+--------------+----------------+-------------------+

[]{#Pset_GlazingType .anchor}**Pset_GlazingType**

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_GlazingType
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Properties common to the definition
                   of all glazing as referred to by other property sets.
  ---------------- ---------------------------------------------------------

Property Definitions:

  ------------------------------------ ------------------------ -------------------------------- ---------------------
  **Name**                             **Property Type**        **Data Type**                    **Definition**

  NumberOfGlasses                      IfcPropertySingleValue   IfcCountMeasure                  Number of glass
                                                                                                 layers within the
                                                                                                 frame. E.g. \"2\" for
                                                                                                 double glazing.

  Thickness                            IfcPropertySingleValue   IfcPositiveLengthMeasure         Thickness of the
                                                                                                 glass.

  FillGas                              IfcPropertySingleValue   IfcString                        Name of the gas by
                                                                                                 which the gap between
                                                                                                 two glass layers is
                                                                                                 filled.

  Color                                IfcPropertySingleValue   IfcString                        Color (tint)
                                                                                                 selection for this
                                                                                                 glazing.

  IsTempered                           IfcPropertySingleValue   IfcBoolean                       Indication whether
                                                                                                 the glass is tempered
                                                                                                 (TRUE) or not (FALSE)

  IsLaminated                          IfcPropertySingleValue   IfcBoolean                       Indication whether
                                                                                                 the glass is layered
                                                                                                 with other materials
                                                                                                 (TRUE) or not
                                                                                                 (FALSE).

  IsCoated                             IfcPropertySingleValue   IfcBoolean                       Indication whether
                                                                                                 the glass is coated
                                                                                                 with a material
                                                                                                 (TRUE) or not
                                                                                                 (FALSE).

  IsWired                              IfcPropertySingleValue   IfcBoolean                       Indication whether
                                                                                                 the glass includes a
                                                                                                 contained wire mesh
                                                                                                 to prevent break-in
                                                                                                 (TRUE) or not (FALSE)

  ImpactResistance                     IfcPropertySingleValue   IfcString                        Description of the
                                                                                                 resistance to
                                                                                                 shatter. Either given
                                                                                                 by description or by
                                                                                                 a numeric value of a
                                                                                                 scale (1..10)
                                                                                                 accoridng to regional
                                                                                                 classifications.

  Translucency                         IfcPropertySingleValue   IfcPositiveRatioMeasure          Fraction of the
                                                                                                 visible light that
                                                                                                 passes the glazing at
                                                                                                 normal incidence. It
                                                                                                 is a value without
                                                                                                 unit.

  Reflectivity                         IfcPropertySingleValue   IfcPositiveRatioMeasure          Fraction of the
                                                                                                 visible light that is
                                                                                                 reflected by the
                                                                                                 glazing at normal
                                                                                                 incidence. It is a
                                                                                                 value without unit.

  BeamRadiationTransmittance           IfcPropertySingleValue   IfcPositiveRatioMeasure          Direct solar
                                                                                                 radiation
                                                                                                 tarnsmittance that
                                                                                                 passes the glazing at
                                                                                                 normal incidence. It
                                                                                                 is a value without
                                                                                                 unit, often refered
                                                                                                 to as (Tsol).

  SolarHeatGain                        IfcPropertySingleValue   IfcPositiveRatioMeasure          Total solar heat
                                                                                                 transmittance that
                                                                                                 passes the glazing at
                                                                                                 normal incidence. It
                                                                                                 is a value without
                                                                                                 unit, often refered
                                                                                                 to as (SHGC):

  ThermalTransmittanceSummerShaded     IfcPropertySingleValue   IfcThermalTransmittanceMeasure / Summer shaded thermal
                                                                ThermalTransmittanceUnit         transmittance
                                                                                                 coefficient, often
                                                                                                 refered to as
                                                                                                 (U-value)

  ThermalTransmittanceSummerUnshaded   IfcPropertySingleValue   IfcThermalTransmittanceMeasure / Summer unshaded
                                                                ThermalTransmittanceUnit         thermal transmittance
                                                                                                 coefficient, often
                                                                                                 refered to as
                                                                                                 (U-value)

  ThermalTransmittanceWinter           IfcPropertySingleValue   IfcThermalTransmittanceMeasure / Winter thermal
                                                                ThermalTransmittanceUnit         transmittance
                                                                                                 coefficient, often
                                                                                                 refered to as
                                                                                                 (U-value)
  ------------------------------------ ------------------------ -------------------------------- ---------------------

[]{#Pset_GutterSegment .anchor}[Pset_GutterSegment]{.underline}

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_GutterSegment
  Name**           

  **Typed**        True

  **TypedClass**   [IfcFlowSegment](#IfcFlowSegment)

  **TypeName**     GutterSegment

  **Definition**   Definition from IAI: HISTORY: New property set in IFC
                   Release 2.0. ISSUES: No issues to date.
  ---------------- ---------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ------------------------------ ----------------------
  **Name**         **Property Type**        **Data Type**                  **Definition**

  Slope            IfcPropertySingleValue   IfcPlaneAngleMeasure           Angle of the gutter to
                                                                           allow for drainage

  FlowRating       IfcPropertySingleValue   IfcVolumetricFlowRateMeasure / Actual flow capacity
                                            VolumetricFlowrateUnit         for the gutter. Value
                                                                           of 0.00 means this
                                                                           value has not been
                                                                           set.
  ---------------- ------------------------ ------------------------------ ----------------------

[]{#Pset_HandOperatedActuator
.anchor}[Pset_HandOperatedActuator]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_HandOperatedActuator
  Name**           

  **Typed**        True

  **TypedClass**   [IfcActuator](#IfcActuator)

  **TypeName**     HandOperatedActuator

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a hand-operated actuator. HISTORY:
                   New property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ -------------- ----------------------
  **Name**         **Property Type**        **Data Type**  **Definition**

  ManualOverride   IfcPropertySingleValue   IfcBoolean     Identifies whether
                                                           hand-operated
                                                           operation is provided
                                                           as an override
  ---------------- ------------------------ -------------- ----------------------

[]{#Pset_HardwareGroup .anchor}[Pset_HardwareGroup]{.underline}

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_HardwareGroup
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Properties common to the definition
                   of all hardware groups as referred to by other property
                   sets.
  ---------------- ---------------------------------------------------------

Property Definitions:

  ------------------ --------------------------- ----------------- --------------------
  **Name**           **Property Type**           **Data Type**     **Definition**

  Reference          IfcPropertySingleValue      IfcIdentifier     User defined
                                                                   reference for this
                                                                   standard collection
                                                                   of hardware elements
                                                                   within this project.

  Description        IfcPropertySingleValue      IfcString         Specific description
                                                                   for this type of
                                                                   hardware within this
                                                                   project.

  Manufacturer       IfcPropertyReferenceValue   IfcOrganization   The organization
                                                                   that manufactured or
                                                                   assembled the item.

  ModelLabel         IfcPropertySingleValue      IfcString         The model number
                                                                   and/or unit
                                                                   designator assigned
                                                                   by the manufacturer
                                                                   of the manufactured
                                                                   item.

  ModelDescription   IfcPropertySingleValue      IfcString         A physical
                                                                   description of the
                                                                   manufactured item as
                                                                   provided by the
                                                                   manufacturer of the
                                                                   munufactured item.

  Finish             IfcPropertySingleValue      IfcString         Finish applied to
                                                                   hardware
  ------------------ --------------------------- ----------------- --------------------

[]{#Pset_HvacSensor .anchor}[Pset_HvacSensor]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_HvacSensor
  Name**           

  **Typed**        True

  **TypedClass**   [IfcSensor](#IfcSensor)

  **TypeName**     HvacSensor

  **Definition**   Definition from IAI: This property set is used to define
                   the general characteristics of a sensor used in an HVAC
                   control system. HISTORY: New property set in IFC Release
                   2.0. ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+--------------+----------------+------------+------------------------+
| **Name**     | **Property     | **Data     | **Definition**         |
|              | Type**         | Type**     |                        |
+--------------+----------------+------------+------------------------+
| Se           | IfcPropertyE   | Pset_Sens  | Enumeration that       |
| nsorTypeEnum | numeratedValue | orTypeEnum | identifies the type of |
|              |                |            | HVAC sensor            |
|              |                | -   Flow   |                        |
|              |                |            |                        |
|              |                | -          |                        |
|              |                |   Pressure |                        |
|              |                |            |                        |
|              |                | -   T      |                        |
|              |                | emperature |                        |
|              |                |            |                        |
|              |                | -   Gas    |                        |
|              |                |            |                        |
|              |                | -   Con    |                        |
|              |                | centration |                        |
|              |                |            |                        |
|              |                | -   Volts  |                        |
|              |                |            |                        |
|              |                | -   Amps   |                        |
|              |                |            |                        |
|              |                | -          |                        |
|              |                |    Density |                        |
|              |                |            |                        |
|              |                | -          |                        |
|              |                |  Viscosity |                        |
|              |                |            |                        |
|              |                | -   Energy |                        |
|              |                |            |                        |
|              |                | -          |                        |
|              |                |   Humidity |                        |
|              |                |            |                        |
|              |                | -   Other  |                        |
|              |                |            |                        |
|              |                | -          |                        |
|              |                |   NotKnown |                        |
|              |                |            |                        |
|              |                | -   Unset  |                        |
+--------------+----------------+------------+------------------------+
| Accuracy     | IfcPrope       | IfcReal    | The accuracy of the    |
|              | rtySingleValue |            | sensor                 |
+--------------+----------------+------------+------------------------+
| TimeConstant | IfcPrope       | IfcT       | The time constant of   |
|              | rtySingleValue | imeMeasure | the sensor .           |
+--------------+----------------+------------+------------------------+
| Upp          | IfcPrope       | IfcReal    | The upper range value. |
| erRangeValue | rtySingleValue |            |                        |
+--------------+----------------+------------+------------------------+
| Low          | IfcPrope       | IfcReal    | The lower range value. |
| erRangeValue | rtySingleValue |            |                        |
+--------------+----------------+------------+------------------------+

[]{#Pset_HydraulicActuator .anchor}[Pset_HydraulicActuator]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_HydraulicActuator
  Name**           

  **Typed**        True

  **TypedClass**   [IfcActuator](#IfcActuator)

  **TypeName**     HydraulicActuator

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a hydraulic actuator. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ------------------------------ ---------------------
  **Name**         **Property Type**        **Data Type**                  **Definition**

  ManualOverride   IfcPropertySingleValue   IfcBoolean                     Identifies whether
                                                                           hand-operated
                                                                           operation is provided
                                                                           as an override

  InputPressure    IfcPropertySingleValue   IfcPressureMeasure /           Maximum design
                                            PressureUnit                   pressure for the
                                                                           actuator

  InputFlowrate    IfcPropertySingleValue   IfcVolumetricFlowRateMeasure / Maximum hydraulic
                                            VolumetricFlowrateUnit         flowrate requirement
  ---------------- ------------------------ ------------------------------ ---------------------

[]{#Pset_Insulation .anchor}[Pset_Insulation]{.underline}

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_Insulation
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDiscreteElement](#IfcDiscreteElement)

  **TypeName**     Insulation

  **Definition**   Definition from IAI: Materials with low heat conductance.
                   HISTORY: New property set in IFC Release 1.0. ISSUES: No
                   issues to date.
  ---------------- ---------------------------------------------------------

Property Definitions:

+--------------+----------------+------------------+------------------+
| **Name**     | **Property     | **Data Type**    | **Definition**   |
|              | Type**         |                  |                  |
+--------------+----------------+------------------+------------------+
| Insula       | IfcPropertyE   | Pset_In          | This enumeration |
| tionTypeEnum | numeratedValue | sulationTypeEnum | defines          |
|              |                |                  | different types  |
|              |                | -                | of insulation    |
|              |                | InorganicFibrous | (I.e.,           |
|              |                |                  | I                |
|              |                | -   I            | norganicFibrous, |
|              |                | norganicCellular | In               |
|              |                |                  | organicCellular, |
|              |                | -                | OrganicFibrous,  |
|              |                |   OrganicFibrous | OrganicCellular, |
|              |                |                  | etc.) as defined |
|              |                | -                | by ASHRAE 1997   |
|              |                |  OrganicCellular | Fundamenatals    |
|              |                |                  | Section 22.2     |
|              |                | -   Metallic     | Basic Materials. |
|              |                |                  |                  |
|              |                | -   Meta         |                  |
|              |                | llizedOrganicRef |                  |
|              |                | lectiveMembranes |                  |
|              |                |                  |                  |
|              |                | -   Other        |                  |
|              |                |                  |                  |
|              |                | -   NotKnown     |                  |
|              |                |                  |                  |
|              |                | -   Unset        |                  |
+--------------+----------------+------------------+------------------+
| Thickness    | IfcPrope       | IfcPosit         | Insulation       |
|              | rtySingleValue | iveLengthMeasure | Thickness        |
+--------------+----------------+------------------+------------------+
| JacketType   | IfcProperty    | IfcMaterial      | Jacket material  |
|              | ReferenceValue |                  | type of the      |
|              |                |                  | insulation       |
+--------------+----------------+------------------+------------------+
| Flama        | IfcPrope       | IfcString        | Insulation       |
| bilityRating | rtySingleValue |                  | flammability     |
|              |                |                  | rating           |
+--------------+----------------+------------------+------------------+

[]{#Pset_LinearActuator .anchor}[Pset_LinearActuator]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_LinearActuator
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a linear actuator. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+--------------+----------------+---------------+---------------------+
| **Name**     | **Property     | **Data Type** | **Definition**      |
|              | Type**         |               |                     |
+--------------+----------------+---------------+---------------------+
| FailD        | IfcPropertyE   | Pset_Linea    | Enumeration that    |
| irectionEnum | numeratedValue | rActuatorFail | identifies the      |
|              |                | DirectionEnum | behavior of the     |
|              |                |               | actuator in case of |
|              |                | -   FailIn    | power failure       |
|              |                |               |                     |
|              |                | -   FailOut   |                     |
|              |                |               |                     |
|              |                | -   Other     |                     |
|              |                |               |                     |
|              |                | -   NotKnown  |                     |
|              |                |               |                     |
|              |                | -   Unset     |                     |
+--------------+----------------+---------------+---------------------+
| Force        | IfcPrope       | If            | Indicates the       |
|              | rtySingleValue | cForceMeasure | maximum close-off   |
|              |                | / ForceUnit   | force for the       |
|              |                |               | actuator            |
+--------------+----------------+---------------+---------------------+
| Stroke       | IfcPrope       | Ifc           | Indicates the       |
|              | rtySingleValue | LengthMeasure | maximum distance    |
|              |                |               | the actuator must   |
|              |                |               | traverse            |
+--------------+----------------+---------------+---------------------+

[]{#Pset_LoadDesignCriteria
.anchor}[Pset_LoadDesignCriteria]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_LoadDesignCriteria
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Building thermal load design data
                   such as occupancy, appliance, and lighting criteria that
                   are used for calculating thermal loads in a space or
                   building. HISTORY: New property set in IFC Release 1.0.
                   ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+----------------+-------------+-----------------+--------------------+
| **Name**       | **Property  | **Data Type**   | **Definition**     |
|                | Type**      |                 |                    |
+----------------+-------------+-----------------+--------------------+
| Occ            | IfcP        | Pset_Oc         | This enumeration   |
| upancyTypeEnum | ropertyEnum | cupancyTypeEnum | identifies types   |
|                | eratedValue |                 | of occupancy or    |
|                |             | -   Theater     | space usage (e.g., |
|                |             |                 | Theater, Office,   |
|                |             | -   Office      | Hotel, Apartment,  |
|                |             |                 | etc.) as defined   |
|                |             | -   Hotel       | by Table 3,        |
|                |             |                 | Chapter 28, of the |
|                |             | -   Apartment   | 1997 ASHRAE        |
|                |             |                 | Handbook of        |
|                |             | -   RetailStore | Fundamentals.      |
|                |             |                 |                    |
|                |             | -   DrugStore   |                    |
|                |             |                 |                    |
|                |             | -   Bank        |                    |
|                |             |                 |                    |
|                |             | -   Restaurant  |                    |
|                |             |                 |                    |
|                |             | -   Factory     |                    |
|                |             |                 |                    |
|                |             | -   DanceHall   |                    |
|                |             |                 |                    |
|                |             | -               |                    |
|                |             |    BowlingAlley |                    |
|                |             |                 |                    |
|                |             | -   Gymnasium   |                    |
|                |             |                 |                    |
|                |             | -   Other       |                    |
|                |             |                 |                    |
|                |             | -   NotKnown    |                    |
|                |             |                 |                    |
|                |             | -   Unset       |                    |
+----------------+-------------+-----------------+--------------------+
| AreaPerPerson  | IfcProperty | IfcAreaMeasure  | Design occupancy   |
|                | SingleValue |                 | loading for this   |
|                |             |                 | type of usage      |
+----------------+-------------+-----------------+--------------------+
| Peop           | IfcProperty | IfcPowerMeasure | Sensible thermal   |
| leSensibleLoad | SingleValue | / PowerUnit     | load contributed   |
|                |             |                 | per person.        |
+----------------+-------------+-----------------+--------------------+
| Pe             | IfcProperty | IfcPowerMeasure | Latent thermal     |
| opleLatentLoad | SingleValue | / PowerUnit     | load contributed   |
|                |             |                 | per person.        |
+----------------+-------------+-----------------+--------------------+
| PeopleSensibl  | IfcProperty | IfcPosit        | Percent of         |
| eLoadToRadiant | SingleValue | iveRatioMeasure | sensible thermal   |
|                |             |                 | load contributed   |
|                |             |                 | by people to       |
|                |             |                 | radiant heat.      |
+----------------+-------------+-----------------+--------------------+
| Occu           | IfcProperty | IfcPosit        | Diversity factor   |
| pancyDiversity | SingleValue | iveRatioMeasure | that may be        |
|                |             |                 | applied to the     |
|                |             |                 | number of people   |
|                |             |                 | in the space.      |
+----------------+-------------+-----------------+--------------------+
| Outsi          | IfcProperty | IfcVolumetric   | Design quantity of |
| deAirPerPerson | SingleValue | FlowRateMeasure | outside air to be  |
|                |             | /               | provided per       |
|                |             | Volumet         | person in the      |
|                |             | ricFlowrateUnit | space.             |
+----------------+-------------+-----------------+--------------------+
| Receptacl      | IfcProperty | IfcReal /       | Average power use  |
| eLoadIntensity | SingleValue | UserDefined     | intensity of       |
|                |             |                 | appliances and     |
|                |             |                 | other non-HVAC     |
|                |             |                 | equipment.in the   |
|                |             |                 | space per unit     |
|                |             |                 | area.(PowerMeasu   |
|                |             |                 | re/IfcAreaMeasure) |
+----------------+-------------+-----------------+--------------------+
| A              | IfcProperty | IfcPosit        | Percent of         |
| ppliancePercen | SingleValue | iveRatioMeasure | sensible load to   |
| tLoadToRadiant |             |                 | radiant heat.      |
+----------------+-------------+-----------------+--------------------+
| Lightin        | IfcProperty | IfcReal /       | Average lighting   |
| gLoadIntensity | SingleValue | UserDefined     | load intensity in  |
|                |             |                 | the space per unit |
|                |             |                 | area               |
|                |             |                 | (PowerMeasu        |
|                |             |                 | re/IfcAreaMeasure) |
+----------------+-------------+-----------------+--------------------+
| Li             | IfcProperty | IfcPosit        | Percent of         |
| ghtingPercentL | SingleValue | iveRatioMeasure | lighting load to   |
| oadToReturnAir |             |                 | the return air     |
|                |             |                 | plenum.            |
+----------------+-------------+-----------------+--------------------+

[]{#Pset_Louver .anchor}[Pset_Louver]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_Louver
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     Louver

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a louver. HISTORY: New property set
                   in IFC Release 2.0. ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ------------------ -------------------------
  **Name**         **Property Type**        **Data Type**      **Definition**

  FrameType        IfcPropertySingleValue   IfcString          The type of frame used by
                                                               the louver (e.g.,
                                                               Standard, Drainable,
                                                               etc.)

  FrameThickness   IfcPropertySingleValue   IfcLengthMeasure   The thickness of the
                                                               louver frame

  BladeType        IfcPropertySingleValue   IfcString          The type of blade used in
                                                               the louver (e.g., \"J\",
                                                               \"K\", Cheveron,
                                                               Sightproof, Drainable,
                                                               etc.)

  BladeThickness   IfcPropertySingleValue   IfcLengthMeasure   The thickness of the
                                                               louver blade

  ScreenType       IfcPropertySingleValue   IfcString          The type of screen used
                                                               in the louver (e.g.,
                                                               Birdscreen, Insect
                                                               Screen, etc.)
  ---------------- ------------------------ ------------------ -------------------------

[]{#Pset_ManufactureOccurrence
.anchor}[Pset_ManufactureOccurrence]{.underline}

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_ManufactureOccurrence
  Name**           

  **Typed**        True

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Properties about the occurrence
                   specific manufacturer information. Can be attached to all
                   IfcElement.
  ---------------- ---------------------------------------------------------

Property Definitions:

  ----------------- --------------------------- ----------------- ----------------------
  **Name**          **Property Type**           **Data Type**     **Definition**

  SerialNumber      IfcPropertySingleValue      IfcString         The serial number
                                                                  assigned to the
                                                                  individual
                                                                  manufactured item

  AcquisitionDate   IfcPropertyReferenceValue   IfcCalendarDate   The date that the
                                                                  manufactured item was
                                                                  purchased
  ----------------- --------------------------- ----------------- ----------------------

[]{#Pset_OpeningShadingType
.anchor}[Pset_OpeningShadingType]{.underline}

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_OpeningShadingType
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Properties common to the definition
                   of all shading types as referred to by other property
                   sets
  ---------------- ---------------------------------------------------------

Property Definitions:

  ------------------------------- ------------------------ -------------------------- ----------------
  **Name**                        **Property Type**        **Data Type**              **Definition**

  ExternalShadingCoefficient      IfcPropertySingleValue   IfcPositiveRatioMeasure    radiation
                                                                                      transmission
                                                                                      coefficient of
                                                                                      the outside
                                                                                      shading device.
                                                                                      It is a value
                                                                                      without unit.
                                                                                      The following
                                                                                      translations
                                                                                      apply: G:
                                                                                      Durchlasfaktor
                                                                                      Sonnenschutz
                                                                                      ausen, JA: GAIBU
                                                                                      SHAHEI-KEISU

  InternalShadingCoefficient      IfcPropertySingleValue   IfcPositiveRatioMeasure    radiation
                                                                                      transmission
                                                                                      coefficient of
                                                                                      the inside
                                                                                      shading device,
                                                                                      symbol
                                                                                      \"b-value\". It
                                                                                      is a value
                                                                                      without unit.
                                                                                      The following
                                                                                      translations
                                                                                      apply: G:
                                                                                      Durchlasfaktor
                                                                                      Sonnenschutz
                                                                                      innen, JA: NAIBU
                                                                                      SHAHEI-KEISU

  InsetShadingCoefficient         IfcPropertySingleValue   IfcPositiveRatioMeasure    radiation
                                                                                      transmission
                                                                                      coefficient of
                                                                                      the shading
                                                                                      device inside
                                                                                      the glazing,
                                                                                      symbol
                                                                                      \"b-value\". It
                                                                                      is a value
                                                                                      without unit.
                                                                                      The following
                                                                                      translations
                                                                                      apply: G:
                                                                                      Durchlasfaktor
                                                                                      Sonnenschutz
                                                                                      innerhalb der
                                                                                      Verglasung, JA:
                                                                                      KUMIKOMI
                                                                                      SHAHEI-KEISU

  DistanceToLateralShadingLeft    IfcPropertySingleValue   IfcPositiveLengthMeasure   Distance between
                                                                                      the lateral
                                                                                      shading device
                                                                                      and the window
                                                                                      or door opening
                                                                                      as shown in the
                                                                                      figure.

  DistanceToLateralShadingRight   IfcPropertySingleValue   IfcPositiveLengthMeasure   Distance between
                                                                                      the lateral
                                                                                      shading device
                                                                                      and the window
                                                                                      or door opening
                                                                                      as shown in the
                                                                                      figure.

  ProjectionOfLateralShading      IfcPropertySingleValue   IfcPositiveLengthMeasure   Projection of
                                                                                      the lateral
                                                                                      shading device
                                                                                      from the facade
                                                                                      (outer surface
                                                                                      of the building
                                                                                      element, in
                                                                                      which the door
                                                                                      or window is
                                                                                      located)

  DistanceToTopShading            IfcPropertySingleValue   IfcPositiveLengthMeasure   Distance between
                                                                                      the shading
                                                                                      device on top
                                                                                      and the window
                                                                                      or door opening
                                                                                      as shown in the
                                                                                      figure.

  ProjectionOfTopShading          IfcPropertySingleValue   IfcPositiveLengthMeasure   Projection of
                                                                                      the shading
                                                                                      device on the
                                                                                      top from the
                                                                                      facade (outer
                                                                                      surface of the
                                                                                      building
                                                                                      element, in
                                                                                      which the door
                                                                                      or window is
                                                                                      located)
  ------------------------------- ------------------------ -------------------------- ----------------

[]{#Pset_OutsideDesignCriteria
.anchor}[Pset_OutsideDesignCriteria]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_OutsideDesignCriteria
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Outside air conditions used as the
                   basis for calculating thermal loads at peak conditions.
                   HISTORY: New property set in IFC Release 1.0. ISSUES: No
                   issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ------------------------------------ ---------------------
  **Name**         **Property Type**        **Data Type**                        **Definition**

  HeatingDryBulb   IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Outside dry bulb
                                                                                 temperature for
                                                                                 heating design

  HeatingWetBulb   IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Outside wet bulb
                                                                                 temperature for
                                                                                 heating design

  CoolingDryBulb   IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Outside dry bulb
                                                                                 temperature for
                                                                                 cooling design

  CoolingWetBulb   IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Outside wet bulb
                                                                                 temperature for
                                                                                 cooling design
  ---------------- ------------------------ ------------------------------------ ---------------------

[]{#Pset_PipeFitting .anchor}[Pset_PipeFitting]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_PipeFitting
  Name**           

  **Typed**        True

  **TypedClass**   [IfcFlowFitting](#IfcFlowFitting)

  **TypeName**     PipeFitting

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a pipe fitting. Related property
                   sets include Pset_PipeDesignCriteria. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+---------------+---------------+-------------------+-----------------+
| **Name**      | **Property    | **Data Type**     | **Definition**  |
|               | Type**        |                   |                 |
+---------------+---------------+-------------------+-----------------+
| Fitti         | IfcPropertyEn | Pset_PipeF        | This            |
| ngSubTypeEnum | umeratedValue | ittingSubtypeEnum | enumeration     |
|               |               |                   | identifies the  |
|               |               | -   45DegreeElbow | fitting         |
|               |               |                   | subtype.        |
|               |               | -   90DegreeElbow |                 |
|               |               |                   |                 |
|               |               | -   Cap           |                 |
|               |               |                   |                 |
|               |               | -   Cock          |                 |
|               |               |                   |                 |
|               |               | -   Crossover     |                 |
|               |               |                   |                 |
|               |               | -                 |                 |
|               |               | DoubleBranchElbow |                 |
|               |               |                   |                 |
|               |               | -   Flange        |                 |
|               |               |                   |                 |
|               |               | -   Lateral       |                 |
|               |               |                   |                 |
|               |               | -   PipeJoint     |                 |
|               |               |                   |                 |
|               |               | -   Plug          |                 |
|               |               |                   |                 |
|               |               | -   Reducer       |                 |
|               |               |                   |                 |
|               |               | -   ReducingElbow |                 |
|               |               |                   |                 |
|               |               | -   Sleeve        |                 |
|               |               |                   |                 |
|               |               | -   StreetElbow   |                 |
|               |               |                   |                 |
|               |               | -   Tee           |                 |
|               |               |                   |                 |
|               |               | -   Union         |                 |
|               |               |                   |                 |
|               |               | -   Other         |                 |
|               |               |                   |                 |
|               |               | -   NotKnown      |                 |
|               |               |                   |                 |
|               |               | -   Unset         |                 |
+---------------+---------------+-------------------+-----------------+

[]{#Pset_PipeSegment .anchor}**[Pset_PipeSegment]{.underline}**

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_PipeSegment
  Name**           

  **Typed**        True

  **TypedClass**   [IfcFlowSegment](#IfcFlowSegment)

  **TypeName**     PipeSegment

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a pipe segment. Related property
                   sets include Pset_PipeDesignCriteria. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ ------------------ ----------------------
  **Name**         **Property Type**        **Data Type**      **Definition**

  FinishedLength   IfcPropertySingleValue   IfcLengthMeasure   The finished length of
                                                               the pipe segment
  ---------------- ------------------------ ------------------ ----------------------

[]{#Pset_PipeSystemDesignCriteria
.anchor}[Pset_PipeSystemDesignCriteria]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_PipeSystemDesignCriteria
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: This property set is used to define
                   the general characteristics of the duct system and is
                   typically attached to an instance of an IfcSystem.
                   HISTORY: New property set in IFC Release 2.0. ISSUES: No
                   issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+---------------+--------------------+--------------------+------------+
| **Name**      | **Property Type**  | **Data Type**      | **De       |
|               |                    |                    | finition** |
+---------------+--------------------+--------------------+------------+
| PipeS         | IfcPrope           | Pset_              | E          |
| ystemTypeEnum | rtyEnumeratedValue | PipeSystemTypeEnum | numeration |
|               |                    |                    | that       |
|               |                    | -                  | identifies |
|               |                    |   DomesticHotWater | the type   |
|               |                    |                    | of system  |
|               |                    | -   ChilledWater   |            |
|               |                    |                    |            |
|               |                    | -   CondenserWater |            |
|               |                    |                    |            |
|               |                    | -                  |            |
|               |                    |    HeatingHotWater |            |
|               |                    |                    |            |
|               |                    | -   Steam          |            |
|               |                    |                    |            |
|               |                    | -   Other          |            |
|               |                    |                    |            |
|               |                    | -   NotKnown       |            |
|               |                    |                    |            |
|               |                    | -   Unset          |            |
+---------------+--------------------+--------------------+------------+
| Syst          | IfcP               | IfcString          | System     |
| emDescription | ropertySingleValue |                    | d          |
|               |                    |                    | escription |
+---------------+--------------------+--------------------+------------+
| S             | IfcP               | IfcString          | Physical   |
| ystemLocation | ropertySingleValue |                    | d          |
|               |                    |                    | escription |
|               |                    |                    | of the     |
|               |                    |                    | part of    |
|               |                    |                    | the        |
|               |                    |                    | building   |
|               |                    |                    | the system |
|               |                    |                    | serves     |
+---------------+--------------------+--------------------+------------+
| FluidS        | IfcP               | IfcPressureMeasure | Pressure   |
| ourcePressure | ropertySingleValue | / PressureUnit     | in main    |
|               |                    |                    | for        |
|               |                    |                    | domestic   |
|               |                    |                    | water,     |
|               |                    |                    | s          |
|               |                    |                    | prinklers, |
|               |                    |                    | system     |
|               |                    |                    | pressure   |
|               |                    |                    | for        |
|               |                    |                    | hydronic   |
|               |                    |                    | systems,   |
|               |                    |                    | etc.       |
+---------------+--------------------+--------------------+------------+
| Fl            | IfcP               | IfcPressureMeasure | Lift that  |
| uidLiftHeight | ropertySingleValue | / PressureUnit     | may be     |
|               |                    |                    | required   |
|               |                    |                    | on open    |
|               |                    |                    | systems    |
|               |                    |                    | with dense |
|               |                    |                    | fluids.    |
+---------------+--------------------+--------------------+------------+

[]{#Pset_SiteWeatherData .anchor}[Pset_SiteWeatherData]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_SiteWeatherData
  Name**           

  **Typed**        True

  **TypedClass**   IfcSite

  **TypeName**     

  **Definition**   Definition from IAI: Provides access to weather data
                   appropriate to the site and is used for calculating
                   thermal loads. HISTORY: New property set in IFC Release
                   1.0. ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  --------------- --------------------------- ----------------- -----------------------
  **Name**        **Property Type**           **Data Type**     **Definition**

  Description     IfcPropertySingleValue      IfcString         The site weather data
                                                                station description or
                                                                reference to the data
                                                                source from which
                                                                weather data was
                                                                obtained for use in
                                                                calculations.

  Date            IfcPropertyReferenceValue   IfcCalendarDate   The date for which the
                                                                weather data was
                                                                gathered.
  --------------- --------------------------- ----------------- -----------------------

[]{#Pset_SmokeDamper .anchor}[Pset_SmokeDamper]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_SmokeDamper
  Name**           

  **Typed**        True

  **TypedClass**   [IfcDamper](#IfcDamper)

  **TypeName**     SmokeDamper

  **Definition**   Definition from IAI: This property set is used to define
                   the characteristics of a smoke damper. HISTORY: New
                   property set in IFC Release 2.0. ISSUES: No issues to
                   date.
  ---------------- ----------------------------------------------------------

Property Definitions:

+------------------+---------------+-------------+--------------------+
| **Name**         | **Property    | **Data      | **Definition**     |
|                  | Type**        | Type**      |                    |
+------------------+---------------+-------------+--------------------+
| FrameThickness   | IfcProper     | IfcLe       | The thickness of   |
|                  | tySingleValue | ngthMeasure | the damper frame   |
+------------------+---------------+-------------+--------------------+
| BladeType        | IfcProper     | IfcString   | The type of blade  |
|                  | tySingleValue |             | used in the damper |
|                  |               |             | (e.g., Triple Vee, |
|                  |               |             | Fabricated         |
|                  |               |             | Airfoil, Extruded  |
|                  |               |             | Airfoil, etc.)     |
+------------------+---------------+-------------+--------------------+
| Moun             | IfcPropertyEn | Pset_Damp   | Enumeration that   |
| tingPositionEnum | umeratedValue | erMountingP | identifies how the |
|                  |               | ositionEnum | damper is mounted  |
|                  |               |             | in the building    |
|                  |               | -           |                    |
|                  |               |  Horizontal |                    |
|                  |               |             |                    |
|                  |               | -           |                    |
|                  |               |    Vertical |                    |
|                  |               |             |                    |
|                  |               | -   Other   |                    |
|                  |               |             |                    |
|                  |               | -           |                    |
|                  |               |    NotKnown |                    |
|                  |               |             |                    |
|                  |               | -   Unset   |                    |
+------------------+---------------+-------------+--------------------+
| ControlType      | IfcProper     | IfcString   | The type of        |
|                  | tySingleValue |             | control used to    |
|                  |               |             | operate the damper |
|                  |               |             | (e.g., Open/Closed |
|                  |               |             | Indicator,         |
|                  |               |             | Resetable          |
|                  |               |             | Temperature        |
|                  |               |             | Sensor,            |
|                  |               |             | Temperature        |
|                  |               |             | Override, etc.)    |
+------------------+---------------+-------------+--------------------+
| SleeveLength     | IfcProper     | IfcLe       | The length of the  |
|                  | tySingleValue | ngthMeasure | damper sleeve      |
+------------------+---------------+-------------+--------------------+
| SleeveThickness  | IfcProper     | IfcLe       | The thickness of   |
|                  | tySingleValue | ngthMeasure | the damper sleeve  |
+------------------+---------------+-------------+--------------------+
| Damper           | IfcProper     | IfcString   | The location       |
| LocationInSleeve | tySingleValue |             | within the sleeve  |
|                  |               |             | where the damper   |
|                  |               |             | is mounted (e.g.,  |
|                  |               |             | Center)            |
+------------------+---------------+-------------+--------------------+

[]{#Pset_SoundPowerLevels .anchor}Pset_SoundPowerLevels

  ---------------- ---------------------------------------------------------
  **PropertySet    Pset_SoundPowerLevels
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Sound power levels across eight
                   octave bands specifying the amount of sound generation or
                   sound attenuation.
  ---------------- ---------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ -------------- ----------------------
  **Name**         **Property Type**        **Data Type**  **Definition**

  63Hertz          IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 63
                                                           Hertz.

  125Hetrz         IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 125
                                                           Hertz.

  250Hetrz         IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 250
                                                           Hertz.

  500Hertz         IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 500
                                                           Hertz.

  1000Hetrz        IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 1000
                                                           Hertz.

  2000Hetrz        IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 2000
                                                           Hertz.

  4000Hertz        IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 4000
                                                           Hertz.

  8000Hertz        IfcPropertySingleValue   IfcReal /      Sound Power Level
                                            PressureUnit   measured in decibels
                                                           at a reference power
                                                           of 1
                                                           picowatt(10\^(-12)
                                                           watt) for the octave
                                                           band frequency
                                                           centered around 8000
                                                           Hertz.

  Name             IfcPropertySingleValue   IfcString      The name of this
                                                           property

  Description      IfcPropertySingleValue   IfcString      Description for this
                                                           object

  Attenuates       IfcPropertySingleValue   IfcBoolean     If TRUE, values
                                                           represent sound
                                                           attenuation. If FALSE,
                                                           values represent sound
                                                           generation.
  ---------------- ------------------------ -------------- ----------------------

[]{#Pset_SoundPressureLevels
.anchor}[Pset_SoundPressureLevels]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_SoundPressureLevels
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Sound pressure levels across eight
                   octave bands specifying the amount of sound generation ot
                   sound attenuation. HISTORY: New property set in IFC
                   Release 2.0. ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ---------------- ------------------------ -------------- ----------------------
  **Name**         **Property Type**        **Data Type**  **Definition**

  63Hertz          IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 63
                                                           Hertz.

  125Hetrz         IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 125
                                                           Hertz.

  250Hetrz         IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 250
                                                           Hertz.

  500Hertz         IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 500
                                                           Hertz.

  1000Hetrz        IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 1000
                                                           Hertz.

  2000Hetrz        IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 2000
                                                           Hertz.

  4000Hertz        IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 4000
                                                           Hertz.

  8000Hertz        IfcPropertySingleValue   IfcReal /      Sound Pressure Level
                                            PressureUnit   measured in decibels
                                                           at a reference
                                                           pressure of 20
                                                           microPascals for the
                                                           octave band frequency
                                                           centered around 8000
                                                           Hertz.

  Name             IfcPropertySingleValue   IfcString      The name of this
                                                           property

  Description      IfcPropertySingleValue   IfcString      Description for this
                                                           object

  Attenuates       IfcPropertySingleValue   IfcBoolean     If TRUE, values
                                                           represent sound
                                                           attenuation. If FALSE,
                                                           values represent sound
                                                           generation.
  ---------------- ------------------------ -------------- ----------------------

[]{#Pset_SpaceHvacInformation
.anchor}[Pset_SpaceHvacInformation]{.underline}

  ---------------- ----------------------------------------------------------
  **PropertySet    Pset_SpaceHvacInformation
  Name**           

  **Typed**        False

  **TypedClass**   

  **TypeName**     

  **Definition**   Definition from IAI: Space or zone thermal properties and
                   desgn constraints. HISTORY: New property set in IFC
                   Release 1.0. ISSUES: No issues to date.
  ---------------- ----------------------------------------------------------

Property Definitions:

  ------------------------- ------------------------ ------------------------------------ -------------------
  **Name**                  **Property Type**        **Data Type**                        **Definition**

  CoolingDesignAirflow      IfcPropertySingleValue   IfcVolumetricFlowRateMeasure /       The air flowrate
                                                     VolumetricFlowrateUnit               required during the
                                                                                          peak cooling
                                                                                          conditions.

  HeatingDesignAirflow      IfcPropertySingleValue   IfcVolumetricFlowRateMeasure /       The air flowrate
                                                     VolumetricFlowrateUnit               required during the
                                                                                          peak heating
                                                                                          conditions, but
                                                                                          could also be
                                                                                          determined by
                                                                                          minimum ventilation
                                                                                          requirement or
                                                                                          minimum air change
                                                                                          requirements.

  TotalSensibleHeatGain     IfcPropertySingleValue   IfcPowerMeasure / PowerUnit          The total sensible
                                                                                          heat or energy
                                                                                          gained by the space
                                                                                          during the peak
                                                                                          cooling conditions.

  TotalHeatGain             IfcPropertySingleValue   IfcPowerMeasure / PowerUnit          The total amount of
                                                                                          heat or energy
                                                                                          gained by the space
                                                                                          at the time of the
                                                                                          space\'s peak
                                                                                          cooling conditions.

  TotalHeatLoss             IfcPropertySingleValue   IfcPowerMeasure / PowerUnit          The total amount of
                                                                                          heat or energy lost
                                                                                          by the space at the
                                                                                          time of the
                                                                                          space\'s peak
                                                                                          heating conditions.

  HeatingDryBulb            IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Inside dry bulb
                                                                                          temperature for
                                                                                          heating design

  HeatingRelativeHumidity   IfcPropertySingleValue   IfcPositiveRatioMeasure              Inside relative
                                                                                          humidity for
                                                                                          heating design.

  CoolingDryBulb            IfcPropertySingleValue   IfcThermodynamicTemperatureMeasure   Inside dry bulb
                                                                                          temperature for
                                                                                          cooling design

  CoolingRelativeHumidity   IfcPropertySingleValue   IfcPositiveRatioMeasure              Inside relative
                                                                                          humidity for
                                                                                          cooling design.

  VentilationAirFlowrate    IfcPropertySingleValue   IfcVolumetricFlowRateMeasure /       Ventilation outside
                                                     VolumetricFlowrateUnit               air requirement.

  ExhaustAirFlowrate        IfcPropertySingleValue   IfcVolumetricFlowRateMeasure /       Exhaust air flow
                                                     VolumetricFlowrateUnit               rate for the space.

  CeilingRAPlenum           IfcPropertySingleValue   IfcBoolean                           Ceiling plenum used
                                                                                          for return air or
                                                                                          not. TRUE = Yes,
                                                                                          FALSE = No.

  BoundaryAreaHeatLoss      IfcPropertySingleValue   IfcHeatFluxDensityMeasure /          Heat loss per unit
                                                     HeatFluxDensityUnit                  area for the
                                                                                          boundary object.
                                                                                          This is a design
                                                                                          input value for use
                                                                                          in the absence of
                                                                                          calculated load
                                                                                          data.
  ------------------------- ------------------------ ------------------------------------ -------------------

[^1]: