Source: https://codes.iccsafe.org/public/document/IECC2015/iecc-commercial-provisions
Timestamp: 2018-02-24 16:16:20
Document Index: 582158166

Matched Legal Cases: ['art 430', 'art 430', 'art 431', 'art 431', 'art 431', 'art 431']

IECC—COMMERCIAL PROVISIONS | 2015 International Energy Conservation Code | ICC publicACCESS
C102.1General.
C102.1.1Above code programs.
C103.1General.
C103.2Information on construction documents.
2.Fenestration U-factors and solar heat gain coefficients (SHGCs).
6.Economizer description.
7.Equipment and system controls.
8.Fan motor horsepower (hp) and controls.
9.Duct sealing, duct and pipe insulation and location.
10.Lighting fixture schedule with wattage and control narrative.
11.Location of daylight zones on floor plans.
12.Air sealing details.
C103.2.1Building thermal envelope depiction.
C103.3Examination of documents.
C103.3.1Approval of construction documents.
C103.3.2Previous approvals.
C103.3.3Phased approval.
C103.4Amended construction documents.
C103.5Retention of construction documents.
C104.1General.
C104.2Required inspections.
C104.2.1Footing and foundation inspection.
C104.2.2Framing and rough-in inspection.
C104.2.3Plumbing rough-in inspection.
C104.2.4Mechanical rough-in inspection.
C104.2.5Electrical rough-in inspection.
C104.2.6Final inspection.
C104.3Reinspection.
C104.4Approved inspection agencies.
C104.5Inspection requests.
C104.6Reinspection and testing.
C104.7Approval.
C104.7.1Revocation.
C105.1General.
SECTIONC106
C106.1Referenced codes and standards.
C106.1.1Conflicts.
C106.1.2Provisions in referenced codes and standards.
C106.2Application of references.
C106.3Other laws.
SECTIONC107
C107.1Fees.
C107.2Schedule of permit fees.
C107.3Work commencing before permit issuance.
C107.4Related fees.
C107.5Refunds.
SECTIONC108
C108.1Authority.
C108.2Issuance.
C108.3Emergencies.
C108.4Failure to comply.
SECTIONC109
C109.1General.
C109.2Limitations on authority.
C109.3Qualifications.
SECTIONC402
C402.1General (Prescriptive).
1.The opaque portions of the building thermal envelope shall comply with the specific insulation requirements of Section C402.2 and the thermal requirements of either the R-value-based method of Section C402.1.3; the U-, C-and F-factor-based method of Section C402.1.4; or the component performance alternative of Section C402.1.5.
2.Roof solar reflectance and thermal emittance shall comply with Section C402.3.
3.Fenestration in building envelope assemblies shall comply with Section C402.4.
4.Air leakage of building envelope assemblies shall comply with Section C402.5.
C402.1.1Low-energy buildings.
1.Those with a peak design rate of energy usage less than 3.4 Btu/h · ft2 (10.7 W/m2) or 1.0 watt per square foot (10.7 W/m2) of floor area for space conditioning purposes.
C402.1.2Equipment buildings.
1.Are separate buildings with floor area not more than 500 square feet (50 m2).
2.Are intended to house electronic equipment with installed equipment power totaling not less than 7 watts per square foot (75 W/m2) and not intended for human occupancy.
3.Have a heating system capacity not greater than (17,000 Btu/hr) (5 kW) and a heating thermostat set point that is restricted to not more than 50°F (10°C).
4.Have an average wall and roof U-factor less than 0.200 in Climate Zones 1 through 5 and less than 0.120 in Climate Zones 6 through 8.
5.Comply with the roof solar reflectance and thermal emittance provisions for Climate Zone 1.
C402.1.3Insulation component R-value-based method.
Insulation entirely above roof deck R-20ci R-25ci R-25ci R-25ci R-25ci R-25ci R-30ci R-30ci R-30ci R-30ci R-30ci R-30ci R-35ci R-35ci R-35ci R-35ci
Metal buildingsb R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-19 + R-11 LS R-25 + R-11 LS R-25 + R-11 LS R-30 + R-11 LS R-30 + R-11 LS R-30 + R-11 LS R-30 + R-11 LS
Metal building R-13+ R-6.5ci R-13 + R-6.5ci R13 + R-6.5ci R-13 + R-13ci R-13 + R-6.5ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-13ci R-13 + R-19.5ci R-13 + R-13ci R-13 + R-19.5ci
Metal framed R-13 + R-5ci R-13 + R-5ci R-13 + R-5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-7.5ci R-13 + R-15.6ci R-13 + R-7.5ci R-13 + R17.5ci
Wood framed and other R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-3.8ci or R-20 R-13 + R-7.5ci or R-20 + R-3.8ci R-13 + R-7.5ci or R-20 + R-3.8ci R-13 + R-7.5ci or R-20 + R-3.8ci R-13 + R-7.5ci or R-20 + R-3.8ci R-13 + R-7.5ci or R-20 + R-3.8ci R13 + R-15.6ci or R-20 + R-10ci R13 + R-15.6ci or R-20 + R-10ci
Heated slabs R-7.5 for 12″ below R-7.5 for 12″ below R-7.5 for 12″ below R-7.5 for 12″ below R-10 for 24″ below R-10 for 24″ below R-15 for 24″ below R-15 for 24″ below R-15 for 36″ below R-15 for 36″ below R-15 for 36″ below R-20 for 48″ below R-20 for 24″ below R-20 for 48″ below R-20 for 48″ below R-20 for 48″ below
a.Assembly descriptions can be found in ANSI/ASHRAE/IESNA Appendix A.
b.Where using R-value compliance method, a thermal spacer block shall be provided, otherwise use the U-factor compliance method in Table C402.1.4.
c.R-5.7ci is allowed to be substituted with concrete block walls complying with ASTM C 90, ungrouted or partially grouted at 32 inches or less on center vertically and 48 inches or less on center horizontally, with ungrouted cores filled with materials having a maximum thermal conductivity of 0.44 Btu-in/h-f2 °F.
d.Where heated slabs are below grade, below-grade walls shall comply with the exterior insulation requirements for heated slabs.
e.“Mass floors” shall include floors weighing not less than:
1.35 pounds per square foot of floor surface area; or
2.25 pounds per square foot of floor surface area where the material weight is not more than 120 pounds per cubic foot.
f.Steel floor joist systems shall be insulated to R-38.
C402.1.4Assembly U-factor, C-factor or F-factor-based method.
Insulation entirely above roof deck U-0.048 U-0.039 U-0.039 U-0.039 U-0.039 U-0.039 U-0.032 U-0.032 U-0.032 U-0.032 U-0.032 U-0.032 U-0.028 U-0.028 U-0.028 U-0.028
Wood framed and otherc U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.064 U-0.051 U-0.051 U-0.051 U-0.051 U-0.036 U-0.036
a.Use of Opaque assembly U-factors, C-factors, and F-factors from ANSI/ASHRAE/IESNA 90.1 Appendix A shall be permitted, provided the construction, excluding the cladding system on walls, complies with the appropriate construction details from ANSI/ASHRAE/ISNEA 90.1 Appendix A.
b.Opaque assembly U-factors based on designs tested in accordance with ASTM C1363 shall be permitted. The R-value of continuous insulation shall be permitted to be added to or subtracted from the original tested design.
c.Where heated slabs are below grade, below-grade walls shall comply with the F-factor requirements for heated slabs.
d.“Mass floors” shall include floors weighing not less than:
e.These C-, F- and U-factors are based on assemblies that are not required to contain insulation.
f.Evidence of compliance with the F -factors indicated in the table for heated slabs shall be demonstrated by the application of the unheated slab F-factors and R-values derived from ASHRAE 90.1 Appendix A.
C402.1.4.1Thermal resistance of cold-formed steel walls.
NOMINAL STUD DEPTH (inches) SPACING OF FRAMING (inches) CAVITYR-VALUE (insulation) CORRECTION FACTOR (Fc) EFFECTIVER-VALUE (ER) (Cavity R-Value × Fc)
C402.1.5Component performance alternative.
A = Sum of the (UA Dif) values for each distinct assembly type of the building thermal envelope, other than slabs on grade and below-grade walls.
UA Proposed = Proposed U-value · Area.
UA Table = (U-factor from Table C402.1.3 or Table C402.1.4) · Area.
B = Sum of the (FL Dif) values for each distinct slab-on-grade perimeter condition of the building thermal envelope.
FL Proposed = Proposed F-value · Perimeter length.
FL Table = (F-factor specified in Table C402.1.4) · Perimeter length.
C = Sum of the (CA Dif) values for each distinct below-grade wall assembly type of the building thermal envelope.
CA Proposed = Proposed C-value · Area.
CA Table = (Maximum allowable C-factor specified in Table C402.1.4) · Area.
D = (DA · UV) - (DA · U Wall), but not less than zero.
E = (EA · US) - (EA · U Roof), but not less than zero.
C402.2Specific building thermal envelope insulation requirements (Prescriptive).
C402.2.1Multiple layers of continuous insulation board.
C402.2.2Roof assembly.
1.Continuously insulated roof assemblies where the thickness of insulation varies 1 inch (25 mm) or less and where the area-weighted U-factor is equivalent to the same assembly with the R-value specified in Table C402.1.3.
2.Where tapered insulation is used with insulation entirely above deck, the R-value where the insulation thickness varies 1 inch (25 mm) or less from the minimum thickness of tapered insulation shall comply with the R-value specified in Table C402.1.3.
3.Unit skylight curbs included as a component of a skylight listed and labeled in accordance with NFRC 100 shall not be required to be insulated.
C402.2.3Thermal resistance of above-grade walls.
1.Weighing not less than 35 psf (170 kg/m2) of wall surface area.
2.Weighing not less than 25 psf (120 kg/m2) of wall surface area where the material weight is not more than 120 pcf (1900 kg/m3).
3.Having a heat capacity exceeding 7 Btu/ft2 · °F (144 kJ/m2 · K).
4.Having a heat capacity exceeding 5 Btu/ft2 · °F (103 kJ/m2 · K), where the material weight is not more than 120 pcf (1900 kg/m3).
C402.2.4Floors.
1.The floor framing cavity insulation or structural slab insulation shall be permitted to be in contact with the top side of sheathing or continuous insulation installed on the bottom side of floor assemblies where combined with insulation that meets or exceeds the minimum R-value in Table C402.1.3 for “Metal framed” or “Wood framed and other” values for “Walls, Above Grade” and extends from the bottom to the top of all perimeter floor framing or floor assembly members.
2.Insulation applied to the underside of concrete floor slabs shall be permitted an airspace of not more than 1 inch (25 mm) where it turns up and is in contact with the underside of the floor under walls associated with the building thermal envelope.
C402.2.5Slabs-on-grade perimeter insulation.
C402.2.6Insulation of radiant heating systems.
Radiant heating system panels, and their associated components that are installed in interior or exterior assemblies shall be insulated with a minimum of R-3.5 (0.62 m2/K · W) on all surfaces not facing the space being heated. Radiant heating system panels that are installed in the building thermal envelope shall be separated from the exterior of the building or unconditioned or exempt spaces by not less than the R-value of insulation installed in the opaque assembly in which they are installed or the assembly shall comply with Section C402.1.4.
C402.3Roof solar reflectance and thermal emittance.
1.Portions of the roof that include or are covered by the following:
1.1.Photovoltaic systems or components.
1.2.Solar air or water-heating systems or components.
1.3.Roof gardens or landscaped roofs.
1.4.Above-roof decks or walkways.
1.5.Skylights.
1.6.HVAC systems and components, and other opaque objects mounted above the roof.
2.Portions of the roof shaded during the peak sun angle on the summer solstice by permanent features of the building or by permanent features of adjacent buildings.
3.Portions of roofs that are ballasted with a minimum stone ballast of 17 pounds per square foot [74 kg/m2] or 23 psf [117 kg/m2] pavers.
4.Roofs where not less than 75 percent of the roof area complies with one or more of the exceptions to this section.
a.The use of area-weighted averages to comply with these requirements shall be permitted. Materials lacking 3-year-aged tested values for either solar reflectance or thermal emittance shall be assigned both a 3-year-aged solar reflectance in accordance with Section C402.3.1 and a 3-year-aged thermal emittance of 0.90.
b.Aged solar reflectance tested in accordance with ASTM C 1549, ASTM E 903 or ASTM E 1918 or CRRC-1 Standard.
c.Aged thermal emittance tested in accordance with ASTM C 1371 or ASTM E 408 or CRRC-1 Standard.
d.Solar reflectance index (SRI) shall be determined in accordance with ASTM E 1980 using a convection coefficient of 2.1 Btu/h · ft2 · °F (12W/m2 · K). Calculation of aged SRI shall be based on aged tested values of solar reflectance and thermal emittance.
C402.3.1Aged roof solar reflectance.
C402.4Fenestration (Prescriptive).
a.“N” indicates vertical fenestration oriented within 45 degrees of true north. “SEW” indicates orientations other than “N.” For buildings in the southern hemisphere, reverse south and north. Buildings located at less than 23.5 degrees latitude shall use SEW for all orientations.
C402.4.1Maximum area.
C402.4.1.1Increased vertical fenestration area with daylight responsive controls.
1.In buildings not greater than two stories above grade, not less than 50 percent of the net floor area is within a daylight zone.
2.In buildings three or more stories above grade, not less than 25 percent of the net floor area is within a daylight zone.
3.Daylight responsive controls complying with Section C405.2.3.1 are installed in daylight zones.
4.Visible transmittance (VT) of vertical fenestration is not less than 1.1 times solar heat gain coefficient (SHGC).
C402.4.1.2Increased skylight area with daylight responsive controls.
C402.4.2Minimum skylight fenestration area.
1.A minimum skylight area to daylight zone under skylights of not less than 3 percent where all skylights have a VT of at least 0.40 as determined in accordance with Section C303.1.3.
2.A minimum skylight effective aperture of at least 1 percent, determined in accordance with Equation 4-4.
1.Buildings in Climate Zones 6 through 8.
2.Spaces where the designed general lighting power densities are less than 0.5 W/ft2 (5.4 W/m2).
3.Areas where it is documented that existing structures or natural objects block direct beam sunlight on at least half of the roof over the enclosed area for more than 1,500 daytime hours per year between 8 a.m. and 4 p.m.
4.Spaces where the daylight zone under rooftop monitors is greater than 50 percent of the enclosed space floor area.
5.Spaces where the total area minus the area of daylight zones adjacent to vertical fenestration is less than 2,500 square feet (232 m2), and where the lighting is controlled according to Section C405.2.3.
C402.4.2.1Lighting controls in daylight zones under skylights.
C402.4.2.2Haze factor.
C402.4.3Maximum U-factor and SHGC.
C402.4.3.1Increased skylight SHGC.
In Climate Zones 1 through 6, skylights shall be permitted a maximum SHGC of 0.60 where located above daylight zones provided with daylight responsive controls.
C402.4.3.2Increased skylight U-factor.
Where skylights are installed above daylight zones provided with daylight responsive controls, a maximum U-factor of 0.9 shall be permitted in Climate Zones 1 through 3 and a maximum U-factor of 0.75 shall be permitted in Climate Zones 4 through 8.
C402.4.3.3Dynamic glazing.
C402.4.3.4Area-weighted U-factor.
An area-weighted average shall be permitted to satisfy the U-factor requirements for each fenestration product category listed in Table C402.4. Individual fenestration products from different fenestration product categories listed in Table C402.4 shall not be combined in calculating area-weighted average U-factor.
C402.4.4Doors.
Opaque doors shall comply with the applicable requirements for doors as specified in Tables C402.1.3 and C402.1.4 and be considered part of the gross area of above-grade walls that are part of the building thermal envelope. Other doors shall comply with the provisions of Section C402.4.3 for vertical fenestration.
C402.5Air leakage—thermal envelope (Mandatory).
The thermal envelope of buildings shall comply with Sections C402.5.1 through C402.5.8, or the building thermal envelope shall be tested in accordance with ASTM E 779 at a pressure differential of 0.3 inch water gauge (75 Pa) or an equivalent method approved by the code official and deemed to comply with the provisions of this section when the tested air leakage rate of the building thermal envelope is not greater than 0.40 cfm/ft2 (0.2 L/s · m2). Where compliance is based on such testing, the building shall also comply with Sections C402.5.5, C402.5.6 and C402.5.7.
C402.5.1Air barriers.
C402.5.1.1Air barrier construction.
1.The air barrier shall be continuous for all assemblies that are the thermal envelope of the building and across the joints and assemblies.
2.Air barrier joints and seams shall be sealed, including sealing transitions in places and changes in materials. The joints and seals shall be securely installed in or on the joint for its entire length so as not to dislodge, loosen or otherwise impair its ability to resist positive and negative pressure from wind, stack effect and mechanical ventilation.
3.Penetrations of the air barrier shall be caulked, gasketed or otherwise sealed in a manner compatible with the construction materials and location. Joints and seals associated with penetrations shall be sealed in the same manner or taped or covered with moisture vapor-permeable wrapping material. Sealing materials shall be appropriate to the construction materials being sealed and shall be securely installed around the penetration so as not to dislodge, loosen or otherwise impair the penetrations’ ability to resist positive and negative pressure from wind, stack effect and mechanical ventilation. Sealing of concealed fire sprinklers, where required, shall be in a manner that is recommended by the manufacturer. Caulking or other adhesive sealants shall not be used to fill voids between fire sprinkler cover plates and walls or ceilings.
4.Recessed lighting fixtures shall comply with Section C402.5.8. Where similar objects are installed that penetrate the air barrier, provisions shall be made to maintain the integrity of the air barrier.
C402.5.1.2Air barrier compliance options.
C402.5.1.2.1Materials.
Materials with an air permeability not greater than 0.004 cfm/ft2 (0.02 L/s · m2) under a pressure differential of 0.3 inch water gauge (75 Pa) when tested in accordance with ASTM E 2178 shall comply with this section. Materials in Items 1 through 16 shall be deemed to comply with this section, provided joints are sealed and materials are installed as air barriers in accordance with the manufacturer’s instructions.
1.Plywood with a thickness of not less than 3/8 inch (10 mm).
2.Oriented strand board having a thickness of not less than 3/8 inch (10 mm).
3.Extruded polystyrene insulation board having a thickness of not less than 1/2 inch (12.7 mm).
4.Foil-back polyisocyanurate insulation board having a thickness of not less than 1/2 inch (12.7 mm).
5.Closed-cell spray foam a minimum density of 1.5 pcf (2.4 kg/m3) having a thickness of not less than 11/2 inches (38 mm).
6.Open-cell spray foam with a density between 0.4 and 1.5 pcf (0.6 and 2.4 kg/m3) and having a thickness of not less than 4.5 inches (113 mm).
7.Exterior or interior gypsum board having a thickness of not less than 1/2 inch (12.7 mm).
8.Cement board having a thickness of not less than 1/2 inch (12.7 mm).
9.Built-up roofing membrane.
10.Modified bituminous roof membrane.
11.Fully adhered single-ply roof membrane.
12.A Portland cement/sand parge, or gypsum plaster having a thickness of not less than 5/8 inch (15.9 mm).
13.Cast-in-place and precast concrete.
14.Fully grouted concrete block masonry.
15.Sheet steel or aluminum.
16.Solid or hollow masonry constructed of clay or shale masonry units.
C402.5.1.2.2Assemblies.
Assemblies of materials and components with an average air leakage not greater than 0.04 cfm/ft2 (0.2 L/s · m2) under a pressure differential of 0.3 inch of water gauge (w.g.)(75 Pa) when tested in accordance with ASTM E 2357, ASTM E 1677 or ASTM E 283 shall comply with this section. Assemblies listed in Items 1 through 3 shall be deemed to comply, provided joints are sealed and the requirements of Section C402.5.1.1 are met.
1.Concrete masonry walls coated with either one application of block filler or two applications of a paint or sealer coating.
2.Masonry walls constructed of clay or shale masonry units with a nominal width of 4 inches (102 mm) or more.
3.A Portland cement/sand parge, stucco or plaster not less than 1/2 inch (12.7 mm) in thickness.
C402.5.2Air leakage of fenestration.
1.Field-fabricated fenestration assemblies that are sealed in accordance with Section C402.5.1.
2.Fenestration in buildings that comply with the testing alternative of Section C402.5 are not required to meet the air leakage requirements in Table C402.5.2.
Curtain walls 0.06 NFRC 400 orASTM E 283 at 1.57 psf (75 Pa)
Garage doors 0.40 ANSI/DASMA 105,NFRC 400, orASTM E 283 at 1.57 psf(75 Pa)
a.The maximum rate for windows, sliding and swinging doors, and skylights is permitted to be 0.3 cfm per square foot of fenestration or door area when tested in accordance with AAMA/WDMA/CSA101/I.S.2/A440 at 6.24 psf (300 Pa).
C402.5.3Rooms containing fuel-burning appliances.
2.Fireplaces and stoves complying with Sections 901 through 905 of the International Mechanical Code, and Section 2111.13 of the International Building Code.
C402.5.4Doors and access openings to shafts, chutes, stairways and elevator lobbies.
1.Door openings required to comply with Section 716 or 716.5 of the International Building Code.
2.Doors and door openings required to comply with UL 1784 by the International Building Code.
C402.5.5Air intakes, exhaust openings, stairways and shafts.
C402.5.6Loading dock weatherseals.
C402.5.7Vestibules.
1.Buildings in Climate Zones 1 and 2.
2.Doors not intended to be used by the public, such as doors to mechanical or electrical equipment rooms, or intended solely for employee use.
3.Doors opening directly from a sleeping unit or dwelling unit.
4.Doors that open directly from a space less than 3,000 square feet (298 m2) in area.
5.Revolving doors.
6.Doors used primarily to facilitate vehicular movement or material handling and adjacent personnel doors.
7.Doors that have an air curtain with a velocity of not less than 6.56 feet per second (2 m/s) at the floor that have been tested in accordance with ANSI/AMCA 220 and installed in accordance with the manufacturer’s instructions. Manual or automatic controls shall be provided that will operate the air curtain with the opening and closing of the door. Air curtains and their controls shall comply with Section C408.2.3.
C402.5.8Recessed lighting.
1.IC-rated.
2.Labeled as having an air leakage rate of not more 2.0 cfm (0.944 L/s) when tested in accordance with ASTM E 283 at a 1.57 psf (75 Pa) pressure differential.
3.Sealed with a gasket or caulk between the housing and interior wall or ceiling covering.
SECTIONC403
C403.1General.
C403.2Provisions applicable to all mechanical systems (Mandatory).
C403.2.1Calculation of heating and cooling loads.
Design loads associated with heating, ventilating and air conditioning of the building shall be determined in accordance with ANSI/ASHRAE/ACCA Standard 183 or by an approved equivalent computational procedure using the design parameters specified in Chapter 3. Heating and cooling loads shall be adjusted to account for load reductions that are achieved where energy recovery systems are utilized in the HVAC system in accordance with the ASHRAE HVAC Systems and Equipment Handbook by an approved equivalent computational procedure.
C403.2.2Equipment sizing.
1.Required standby equipment and systems provided with controls and devices that allow such systems or equipment to operate automatically only when the primary equipment is not operating.
2.Multiple units of the same equipment type with combined capacities exceeding the design load and provided with controls that have the capability to sequence the operation of each unit based on load.
C403.2.3HVAC equipment performance requirements.
EQUIPMENT TYPE SIZE CATEGORY HEATINGSECTION TYPE SUBCATEGORY ORRATING CONDITION MINIMUM EFFICIENCY TEST PROCEDUREa
Air conditioners, air cooled < 65,000 Btu/hb All Split System 13.0 SEER 13.0 SEER AHRI 210/240
Through-the-wall (air cooled) ≤ 30,000 Btu/hb All Split system 12.0 SEER 12.0 SEER
Small-duct high-velocity (air cooled) < 65,000 Btu/hb All Split System 11.0 SEER 11.0 SEER
Air conditioners, air cooled ≥ 65,000 Btu/h and < 135,000 Btu/h Electric Resistance (or None) Split System and Single Package 11.2 EER11.4 IEER 11.2 EER12.8 IEER AHRI 340/360
All other Split System and Single Package 11.0 EER11.2 IEER 11.0 EER12.6 IEER
≥ 135,000 Btu/h and < 240,000 Btu/h Electric Resistance (or None) Split System and Single Package 11.0 EER11.2 IEER 11.0 EER12.4 IEER
All other Split System and Single Package 10.8 EER11.0 IEER 10.8 EER12.2 IEER
≥ 240,000 Btu/h and < 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 10.0 EER10.1 IEER 10.0 EER11.6 IEER
All other Split System and Single Package 9.8 EER9.9 IEER 9.8 EER11.4 IEER
≥ 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 9.7 EER9.8 IEER 9.7 EER11.2 IEER
All other Split System and Single Package 9.5 EER9.6 IEER 9.5 EER11.0 IEER
Air conditioners, water cooled < 65,000 Btu/hb All Split System and Single Package 12.1 EER12.3 IEER 12.1 EER12.3 IEER AHRI 210/240
≥ 65,000 Btu/h and < 135,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.1 EER12.3 IEER 12.1 EER13.9 IEER AHRI 340/360
All other Split System and Single Package 11.9 EER12.1 IEER 11.9 EER13.7 IEER
≥ 135,000 Btu/h and < 240,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.5 EER12.5 IEER 12.5 EER13.9 IEER
All other Split System and Single Package 12.3 EER12.5 IEER 12.3 EER13.7 IEER
≥ 240,000 Btu/h and < 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.4 EER12.6 IEER 12.4 EER13.6 IEER
All other Split System and Single Package 12.2 EER12.4 IEER 12.2 EER13.4 IEER
≥ 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.2 EER12.4 IEER 12.2 EER13.5 IEER
All other Split System and Single Package 12.0 EER12.2 IEER 12.0 EER13.3 IEER
Air conditioners, evaporatively cooled < 65,000 Btu/hb All Split System and Single Package 12.1 EER12.3 IEER 12.1 EER12.3 IEER AHRI 210/240
≥ 65,000 Btu/h and < 135,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.1 EER12.3 IEER 12.1 EER12.3 IEER AHRI 340/360
All other Split System and Single Package 11.9 EER12.1 IEER 11.9 EER12.1 IEER
≥ 135,000 Btu/h and < 240,000 Btu/h Electric Resistance (or None) Split System and Single Package 12.0 EER12.2 IEER 12.0 EER12.2 IEER
All other Split System and Single Package 11.8 EER12.0 IEER 11.8 EER12.0 IEER
≥ 240,000 Btu/h and < 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 11.9 EER12.1 IEER 11.9 EER12.1 IEER
All other Split System and Single Package 11.7 EER11.9 IEER 11.7 EER11.9 IEER
≥ 760,000 Btu/h Electric Resistance (or None) Split System and Single Package 11.7 EER11.9 IEER 11.7 EER11.9 IEER
All other Split System and Single Package 11.5 EER11.7 IEER 11.5 EER11.7 IEER
Condensing units, air cooled ≥ 135,000 Btu/h 10.5 EER11.8 IEER 10.5 EER11.8 IEER AHRI 365
Condensing units, water cooled ≥ 135,000 Btu/h 13.5 EER14.0 IEER 13.5 EER14.0 IEER
Condensing units, evaporatively cooled ≥ 135,000 Btu/h 13.5 EER14.0 IEER 13.5 EER14.0 IEER
a.Chapter 6 contains a complete specification of the referenced test procedure, including the reference year version of the test procedure.
b.Single-phase, air-cooled air conditioners less than 65,000 Btu/h are regulated by NAECA. SEER values are those set by NAECA.
c.Minimum efficiency as of January 1, 2015.
EQUIPMENT TYPE SIZE CATEGORY HEATINGSECTION TYPE SUBCATEGORY ORRATING CONDITION MINIMUMEFFICIENCY TEST PROCEDUREa
Air cooled (cooling mode) < 65,000 Btu/hb All Split System 13.0 SEERc 14.0 SEERc AHRI 210/240
Through-the-wall, air cooled ≤ 30,000 Btu/hb All Split System 12.0 SEER 12.0 SEER
Single-duct high-velocity air cooled < 65,000 Btu/hb All Split System 11.0 SEER 11.0 SEER
Air cooled (cooling mode) ≥ 65,000 Btu/h and < 135,000 Btu/h Electric Resistance (or None) Split System and Single Package 11.0 EER 11.2 IEER 11.0 EER 12.0 IEER AHRI 340/360
All other Split System and Single Package 10.8 EER 11.0 IEER 10.8 EER 11.8 IEER
≥ 135,000 Btu/h and < 240,000 Btu/h Electric Resistance (or None) Split System and Single Package 10.6 EER 10.7 IEER 10.6 EER 11.6 IEER
All other Split System and Single Package 10.4 EER 10.5 IEER 10.4 EER 11.4 IEER
≥ 240,000 Btu/h Electric Resistance (or None) Split System and Single Package 9.5 EER 9.6 IEER 9.5 EER 10.6 IEER
All other Split System and Single Package 9.3 EER 9.4 IEER 9.3 EER 9.4 IEER
Water to Air: Water Loop (cooling mode) < 17,000 Btu/h All 86°F entering water 12.2 EER 12.2 EER ISO 13256-1
≥ 17,000 Btu/h and < 65,000 Btu/h All 86°F entering water 13.0 EER 13.0 EER
≥ 65,000 Btu/h and < 135,000 Btu/h All 86°F entering water 13.0 EER 13.0 EER
Water to Air: Ground Water (cooling mode) < 135,000 Btu/h All 59°F entering water 18.0 EER 18.0 EER ISO 13256-1
Brine to Air: Ground Loop (cooling mode) < 135,000 Btu/h All 77°F entering water 14.1 EER 14.1 EER ISO 13256-1
Water to Water: Water Loop (cooling mode) < 135,000 Btu/h All 86°F entering water 10.6 EER 10.6 EER ISO 13256-2
Water to Water: Ground Water (cooling mode) < 135,000 Btu/h All 59°F entering water 16.3 EER 16.3 EER
Brine to Water: Ground Loop (cooling mode) < 135,000 Btu/h All 77°F entering fluid 12.1 EER 12.1 EER
Air cooled (heating mode) < 65,000 Btu/hb — Split System 7.7 HSPFc 8.2 HSPFc AHRI 210/240
Through-the-wall, (air cooled, heating mode) ≤ 30,000 Btu/hb (cooling capacity) — Split System 7.4 HSPF 7.4 HSPF
Small-duct high velocity (air cooled, heating mode) < 65,000 Btu/hb — Split System 6.8 HSPF 6.8 HSPF
Air cooled (heating mode) ≥ 65,000 Btu/h and < 135,000 Btu/h (cooling capacity) — 47°F db/43°F wb outdoor air 3.3 COP 3.3 COP AHRI 340/360
17°Fdb/15°F wb outdoor air 2.25 COP 2.25 COP
≥ 135,000 Btu/h (cooling capacity) — 47°F db/43°F wb outdoor air 3.2 COP 3.2 COP
17°Fdb/15°F wb outdoor air 2.05 COP 2.05 COP
Water to Air: Water Loop (heating mode) < 135,000 Btu/h (cooling capacity) — 68°F entering water 4.3 COP 4.3 COP ISO 13256-1
Water to Air: Ground Water (heating mode) < 135,000 Btu/h (cooling capacity) — 50°F entering water 3.7 COP 3.7 COP
Brine to Air: Ground Loop (heating mode) < 135,000 Btu/h (cooling capacity) — 32°F entering fluid 3.2 COP 3.2 COP
Water to Water: Water Loop (heating mode) < 135,000 Btu/h (cooling capacity) — 68°F entering water 3.7 COP 3.7 COP ISO 13256-2
Water to Water: Ground Water (heating mode) < 135,000 Btu/h (cooling capacity) — 50°F entering water 3.1 COP 3.1 COP
Brine to Water: Ground Loop (heating mode) < 135,000 Btu/h (cooling capacity) — 32°F entering fluid 2.5 COP 2.5 COP
PTAC (cooling mode) new construction All Capacities 95°F db outdoor air 14.0 — (0.300 × Cap/1000) EERc AHRI 310/380
PTAC (cooling mode) replacementsb All Capacities 95°F db outdoor air 10.9 - (0.213 × Cap/1000) EER
PTHP (cooling mode) new construction All Capacities 95°F db outdoor air 14.0 - (0.300 × Cap/1000) EER
PTHP (cooling mode) replacementsb All Capacities 95°F db outdoor air 10.8 - (0.213 × Cap/1000) EER
PTHP (heating mode) new construction All Capacities — 3.2 - (0.026 × Cap/1000) COP
PTHP (heating mode) replacementsb All Capacities — 2.9 - (0.026 × Cap/1000) COP
SPVAC (cooling mode) < 65,000 Btu/h 95°F db/ 75°F wb outdoor air 9.0 EER AHRI 390
≥ 65,000 Btu/h and < 135,000 Btu/h 95°F db/ 75°F wb outdoor air 8.9 EER
≥ 135,000 Btu/h and < 240,000 Btu/h 95°F db/ 75°F wb outdoor air 8.6 EER
SPVHP (cooling mode) < 65,000 Btu/h 95°F db/ 75°F wb outdoor air 9.0 EER
SPVHP (heating mode) < 65,000 Btu/h 47°F db/ 43°F wb outdoor air 3.0 COP AHRI 390
≥ 65,000 Btu/h and < 135,000 Btu/h 47°F db/ 43°F wb outdoor air 3.0 COP
≥ 135,000 Btu/h and < 240,000 Btu/h 47°F db/ 75°F wb outdoor air 2.9 COP
Room air conditioners, with louvered sides < 6,000 Btu/h — 9.7 SEER ANSI/AHAM RAC-1
≥ 6,000 Btu/h and < 8,000 Btu/h — 9.7 EER
≥ 8,000 Btu/h and < 14,000 Btu/h — 9.8 EER
≥ 14,000 Btu/h and < 20,000 Btu/h — 9.7 SEER
Room air conditioners, without louvered sides < 8,000 Btu/h — 9.0 EER
≥ 8,000 Btu/h and < 20,000 Btu/h — 8.5 EER
Room air-conditioner heat pumps with louvered sides < 20,000 Btu/h — 9.0 EER
Room air-conditioner heat pumps without louvered sides < 14,000 Btu/h — 8.5 EER
a.Chapter 6 contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure.
b.Replacement unit shall be factory labeled as follows: “MANUFACTURED FOR REPLACEMENT APPLICATIONS ONLY: NOT TO BE INSTALLED IN NEW CONSTRUCTION PROJECTS.” Replacement efficiencies apply only to units with existing sleeves less than 16 inches (406 mm) in height and less than 42 inches (1067 mm) in width.
c.Before January 1, 2015 the minimum efficiency shall be 13.8 - (0.300 x Cap/1000) EER.
EQUIPMENT TYPE SIZE CATEGORY(INPUT) SUBCATEGORY OR RATING CONDITION MINIMUM EFFICIENCYd, e TEST PROCEDUREa
Warm-air furnaces, gas fired < 225,000 Btu/h — 78% AFUE or 80%Etc DOE 10 CFR Part 430 orANSI Z21.47
Warm-air furnaces, oil fired < 225,000 Btu/h — 78% AFUE or 80%Etc DOE 10 CFR Part 430 orUL 727
Warm-air duct furnaces, gas fired All capacities Maximum capacityb 80%Ec ANSI Z83.8
Warm-air unit heaters, gas fired All capacities Maximum capacityb 80%Ec ANSI Z83.8
Warm-air unit heaters, oil fired All capacities Maximum capacityb 80%Ec UL 731
b.Minimum and maximum ratings as provided for and allowed by the unit’s controls.
c.Combination units not covered by the National Appliance Energy Conservation Act of 1987 (NAECA) (3-phase power or cooling capacity greater than or equal to 65,000 Btu/h [19 kW]) shall comply with either rating.
d.Et = Thermal efficiency. See test procedure for detailed discussion.
f.Ec = Combustion efficiency. Units shall also include an IID, have jackets not exceeding 0.75 percent of the input rating, and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those furnaces where combustion air is drawn from the conditioned space.
g.Et = Thermal efficiency. Units shall also include an IID, have jacket losses not exceeding 0.75 percent of the input rating, and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those furnaces where combustion air is drawn from the conditioned space.
EQUIPMENT TYPEa SUBCATEGORY OR RATING CONDITION SIZE CATEGORY (INPUT) MINIMUM EFFICIENCYd, e TEST PROCEDURE
≥ 300,000 Btu/h and ≤ 2,500,000 Btu/hb 80% Et 10 CFR Part 431
≥ 300,000 Btu/h and ≤ 2,500,000 Btu/hb 82% Et 10 CFR Part 431
Gas-fired- all, except natural draft ≥ 300,000 Btu/h and ≤ 2,500,000 Btu/hb 79% Et 10 CFR Part 431
Gas-fired-natural draft ≥ 300,000 Btu/h and ≤ 2,500,000 Btu/hb 77% Et
≥ 300,000 Btu/h and ≤ 2,500,000 Btu/hb 81% Et 10 CFR Part 431
b.Maximum capacity – minimum and maximum ratings as provided for and allowed by the unit’s controls.
c.Includes oil-fired (residual).
d.Ec = Combustion efficiency (100 percent less flue losses).
e.Et = Thermal efficiency. See referenced standard for detailed information.
Condensing units, air cooled ≥ 135,000 Btu/h 10.1 EER11.2 IPLV AHRI 365
Condensing units, water or evaporatively cooled ≥ 135,000 Btu/h 13.1 EER13.1 IPLV
b.IPLVs are only applicable to equipment with capacity modulation.
EQUIPMENT TYPE SIZE CATEGORY UNITS BEFORE 1/1/2015 AS OF 1/1/2015 TEST PROCEDUREc
Air-cooled chillers < 150 Tons EER (Btu/W) ≥ 9.562 FL NAc ≥ 10.100 FL ≥ 9.700 FL AHRI 550/590
Air cooled without condenser, electrically operated All capacities EER(Btu/W) Air-cooled chillers without condenser shall be rated with matching condensers and complying with air-cooled chiller efficiency requirements.
Water cooled, electrically operated positive displacement < 75 Tons kW/ton ≤ 0.780 FL ≤ 0.800 FL ≤ 0.750 FL ≤ 0.780 FL
Water cooled, electrically operated centrifugal < 150 Tons kW/ton ≤ 0.634 FL ≤ 0.639 FL ≤ 0.610 FL ≤ 0.695 FL
Air cooled, absorption, single effect All capacities COP ≥ 0.600 FL NAc ≥ 0.600 FL NAc AHRI 560
Water cooled absorption, single effect All capacities COP ≥ 0.700 FL NAc ≥ 0.700 FL NAc
Absorption, double effect, indirect fired All capacities COP ≥ 1.000 FL NAc ≥ 1.000 FL NAc
Absorption double effect direct fired All capacities COP ≥ 1.000 FL NAc ≥ 1.000 FL NAc
a.The requirements for centrifugal chiller shall be adjusted for nonstandard rating conditions in accordance with Section C403.2.3.1 and are only applicable for the range of conditions listed in Section C403.2.3.1. The requirements for air-cooled, water-cooled positive displacement and absorption chillers are at standard rating conditions defined in the reference test procedure.
b.Both the full-load and IPLV requirements shall be met or exceeded to comply with this standard. Where there is a Path B, compliance can be with either Path A or Path B for any application.
c.NA means the requirements are not applicable for Path B and only Path A can be used for compliance.
d.FL represents the full-load performance requirements and IPLV the part-load performance requirements.
EQUIPMENT TYPEa TOTAL SYSTEM HEAT REJECTION CAPACITY AT RATED CONDITIONS SUBCATEGORY OR RATING CONDITIONi PERFORMANCE REQUIREDb, c, d, g, h TEST PROCEDUREe, f
Propeller or axial fan open-circuit cooling towers All 95°F entering water85°F leaving water75°F entering wb ≥ 40.2 gpm/hp CTI ATC-105 andCTI STD-201
Centrifugal fan open-circuit cooling towers All 95°F entering water85°F leaving water75°F entering wb ≥ 20.0 gpm/hp CTI ATC-105 andCTI STD-201
Propeller or axial fan closed-circuit cooling towers All 102°F entering water90°F leaving water75°F entering wb ≥ 14.0 gpm/hp CTI ATC-105S andCTI STD-201
Centrifugal fan closed-circuit cooling towers All 102°F entering water90°F leaving water75°F entering wb ≥7.0 gpm/hp CTI ATC-105S andCTI STD-201
Centrifugal fan evaporative condensers All Ammonia Test Fluid140°F entering gas temperature96.3°F condensing temperature75°F entering wb >110,000 Btu/h·hp CTI ATC-106
Air-cooled condensers All 125°F Condensing Temperature190°F Entering Gas Temperature15°F subcooling 95°F entering db ≥ 176,000 Btu/h·hp AHRI 460
For SI: °C = [(°F)-32]/1.8, L/s · kW = (gpm/hp)/(11.83), COP = (Btu/h · hp)/(2550.7),
a.The efficiencies and test procedures for both open- and closed-circuit cooling towers are not applicable to hybrid cooling towers that contain a combination of wet and dry heat exchange sections.
b.For purposes of this table, open circuit cooling tower performance is defined as the water flow rating of the tower at the thermal rating condition listed in Table 403.2.3(8) divided by the fan nameplate-rated motor power.
c.For purposes of this table, closed-circuit cooling tower performance is defined as the water flow rating of the tower at the thermal rating condition listed in Table 403.2.3(8) divided by the sum of the fan nameplate-rated motor power and the spray pump nameplate-rated motor power.
d.For purposes of this table, air-cooled condenser performance is defined as the heat rejected from the refrigerant divided by the fan nameplate-rated motor power.
e.Chapter 6 contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure. The certification requirements do not apply to field-erected cooling towers.
f.Where a certification program exists for a covered product and it includes provisions for verification and challenge of equipment efficiency ratings, then the product shall be listed in the certification program; or, where a certification program exists for a covered product, and it includes provisions for verification and challenge of equipment efficiency ratings, but the product is not listed in the existing certification program, the ratings shall be verified by an independent laboratory test report.
g.Cooling towers shall comply with the minimum efficiency listed in the table for that specific type of tower with the capacity effect of any project-specific accessories and/or options included in the capacity of the cooling tower
h.For purposes of this table, evaporative condenser performance is defined as the heat rejected at the specified rating condition in the table divided by the sum of the fan motor nameplate power and the integral spray pump nameplate power
i.Requirements for evaporative condensers are listed with ammonia (R-717) and R-507A as test fluids in the table. Evaporative condensers intended for use with halocarbon refrigerants other than R-507A shall meet the minimum efficiency requirements listed in this table with R-507A as the test fluid.
EQUIPMENT TYPE NET SENSIBLE COOLING CAPACITYa MINIMUM SCOP-127b EFFICIENCY DOWNFLOW UNITS/UPFLOW UNITS TEST PROCEDURE
Air conditioners, water cooled with fluid economizer < 65,000 Btu/h 2.55 / 2.44
Air conditioners, glycol cooled (rated at 40% propylene glycol) < 65,000 Btu/h 2.50 / 2.39
Air conditioners, glycol cooled (rated at 40% propylene glycol) with fluid economizer < 65,000 Btu/h 2.45 / 2.34
a.Net sensible cooling capacity: the total gross cooling capacity less the latent cooling less the energy to the air movement system. (Total Gross – latent – Fan Power).
b.Sensible coefficient of performance (SCOP-127): a ratio calculated by dividing the net sensible cooling capacity in watts by the total power input in watts (excluding reheaters and humidifiers) at conditions defined in ASHRAE Standard 127. The net sensible cooling capacity is the gross sensible capacity minus the energy dissipated into the cooled space by the fan system.
C403.2.3.1Water-cooled centrifugal chilling packages.
A = 0.00000014592 · (LIFT)4 – 0.0000346496 · (LIFT)3 + 0.00314196 · (LIFT)2 – 0.147199 · (LIFT) + 3.9302
B = 0.0015 · Lvg Evap + 0.934
1.Minimum evaporator leaving temperature: 36°F.
2.Maximum condenser leaving temperature: 115°F.
3.20°F ≤ LIFT ≤ 80°F.
C403.2.3.2Positive displacement (air- and water-cooled) chilling packages.
C403.2.4HVAC system controls.
C403.2.4.1Thermostatic controls.
1.The perimeter system includes at least one thermostatic control zone for each building exposure having exterior walls facing only one orientation (within +/-45 degrees) (0.8 rad) for more than 50 contiguous feet (15 240 mm); and
2.The perimeter system heating and cooling supply is controlled by thermostats located within the zones served by the system.
C403.2.4.1.1Heat pump supplementary heat.
C403.2.4.1.2Deadband.
1.Thermostats requiring manual changeover between heating and cooling modes.
2.Occupancies or applications requiring precision in indoor temperature control as approved by the code official.
C403.2.4.1.3Set point overlap restriction.
Where a zone has a separate heating and a separate cooling thermostatic control located within the zone, a limit switch, mechanical stop or direct digital control system with software programming shall be provided with the capability to prevent the heating set point from exceeding the cooling set point and to maintain a deadband in accordance with Section C403.2.4.1.2.
C403.2.4.2Off-hour controls.
1.Zones that will be operated continuously.
2.Zones with a full HVAC load demand not exceeding 6,800 Btu/h (2 kW) and having a readily accessible manual shutoff switch.
C403.2.4.2.1Thermostatic setback capabilities.
C403.2.4.2.2Automatic setback and shutdown capabilities.
C403.2.4.2.3Automatic start capabilities.
C403.2.4.3Shutoff dampers.
Outdoor air intake and exhaust openings and stairway and shaft vents shall be provided with Class I motorized dampers. The dampers shall have an air leakage rate not greater than 4 cfm/ft2 (20.3 L/s · m2) of damper surface area at 1.0 inch water gauge (249 Pa) and shall be labeled by an approved agency when tested in accordance with AMCA 500D for such purpose.
1.In buildings less than three stories in height above grade plane.
2.In buildings of any height located in Climate Zones 1, 2 or 3.
3.Where the design exhaust capacity is not greater than 300 cfm (142 L/s).
Gravity (nonmotorized) dampers shall have an air leakage rate not greater than 20 cfm/ft2 (101.6 L/s · m2) where not less than 24 inches (610 mm) in either dimension and 40 cfm/ft2 (203.2 L/s · m2) where less than 24 inches (610 mm) in either dimension. The rate of air leakage shall be determined at 1.0 inch water gauge (249 Pa) when tested in accordance with AMCA 500D for such purpose. The dampers shall be labeled by an approved agency.
C403.2.4.4Zone isolation.
1.Exhaust air and outdoor air connections to isolation areas where the fan system to which they connect is not greater than 5,000 cfm (2360 L/s).
2.Exhaust airflow from a single isolation area of less than 10 percent of the design airflow of the exhaust system to which it connects.
3.Isolation areas intended to operate continuously or intended to be inoperative only when all other isolation areas in a zone are inoperative.
C403.2.4.5Snow- and ice-melt system controls.
C403.2.4.6Freeze protection system controls.
C403.2.4.7Economizer fault detection and diagnostics (FDD).
1.The following temperature sensors shall be permanently installed to monitor system operation:
1.1.Outside air.
1.2.Supply air.
1.3.Return air.
2.Temperature sensors shall have an accuracy of ±2°F (1.1°C) over the range of 40°F to 80°F (4°C to 26.7°C).
3.Refrigerant pressure sensors, where used, shall have an accuracy of ±3 percent of full scale.
4.The unit controller shall be capable of providing system status by indicating the following:
4.1.Free cooling available.
4.2.Economizer enabled.
4.3.Compressor enabled.
4.4.Heating enabled.
4.5.Mixed air low limit cycle active.
4.6.The current value of each sensor.
5.The unit controller shall be capable of manually initiating each operating mode so that the operation of compressors, economizers, fans and the heating system can be independently tested and verified.
6.The unit shall be capable of reporting faults to a fault management application accessible by dayto-day operating or service personnel, or annunciated locally on zone thermostats.
7.The FDD system shall be capable of detecting the following faults:
7.1.Air temperature sensor failure/fault.
7.2.Not economizing when the unit should be economizing.
7.3.Economizing when the unit should not be economizing.
7.4.Damper not modulating.
7.5.Excess outdoor air.
C403.2.5Hot water boiler outdoor temperature setback control.
C403.2.6Ventilation.
C403.2.6.1Demand controlled ventilation.
1.An air-side economizer.
2.Automatic modulating control of the outdoor air damper.
3.A design outdoor airflow greater than 3,000 cfm (1416 L/s).
1.Systems with energy recovery complying with Section C403.2.7.
2.Multiple-zone systems without direct digital control of individual zones communicating with a central control panel.
3.Systems with a design outdoor airflow less than 1,200 cfm (566 L/s).
4.Spaces where the supply airflow rate minus any makeup or outgoing transfer air requirement is less than 1,200 cfm (566 L/s).
5.Ventilation provided for process loads only.
C403.2.6.2Enclosed parking garage ventilation controls.
1.Garages with a total exhaust capacity less than 22,500 cfm (10 620 L/s) with ventilation systems that do not utilize heating or mechanical cooling.
2.Garages that have a garage area to ventilation system motor nameplate power ratio that exceeds 1125 cfm/hp (710 L/s/kW) and do not utilize heating or mechanical cooling.
C403.2.7Energy recovery ventilation systems.
1.Where energy recovery systems are prohibited by the International Mechanical Code.
2.Laboratory fume hood systems that include at least one of the following features:
2.1.Variable-air-volume hood exhaust and room supply systems capable of reducing exhaust and makeup air volume to 50 percent or less of design values.
2.2.Direct makeup (auxiliary) air supply equal to at least 75 percent of the exhaust rate, heated not warmer than 2°F (1.1°C) above room setpoint, cooled to not cooler than 3°F (1.7°C) below room setpoint, no humidification added, and no simultaneous heating and cooling used for dehumidification control.
3.Systems serving spaces that are heated to less than 60°F (15.5°C) and are not cooled.
4.Where more than 60 percent of the outdoor heating energy is provided from site-recovered or site solar energy.
5.Heating energy recovery in Climate Zones 1 and 2.
6.Cooling energy recovery in Climate Zones 3C, 4C, 5B, 5C, 6B, 7 and 8.
7.Systems requiring dehumidification that employ energy recovery in series with the cooling coil.
8.Where the largest source of air exhausted at a single location at the building exterior is less than 75 percent of the design outdoor air flow rate.
9.Systems expected to operate less than 20 hours per week at the outdoor air percentage covered by Table C403.2.7(1).
10.Systems exhausting toxic, flammable, paint or corrosive fumes or dust.
11.Commercial kitchen hoods used for collecting and removing grease vapors and smoke.
≥ 10% and < 20% ≥ 20% and < 30% ≥ 30% and < 40% ≥ 40% and < 50% ≥ 50% and < 60% ≥ 60% and < 70% ≥ 70% and < 80% ≥ 80%
1A, 2A, 3A, 4A, 5A, 6A ≥ 26,000 ≥ 16,000 ≥ 5,500 ≥ 4,500 ≥ 3,500 ≥ 2,000 ≥ 1,000 >0
C403.2.8Kitchen exhaust systems.
1.The ventilation rate required to meet the space heating or cooling load.
2.The hood exhaust flow minus the available transfer air from adjacent space where available transfer air is considered that portion of outdoor ventilation air not required to satisfy other exhaust needs, such as restrooms, and not required to maintain pressurization of adjacent spaces.
1.Not less than 50 percent of all replacement air shall be transfer air that would otherwise be exhausted.
2.Demand ventilation systems on not less than 75 percent of the exhaust air that are capable of not less than a 50-percent reduction in exhaust and replacement air system airflow rates, including controls necessary to modulate airflow in response to appliance operation and to maintain full capture and containment of smoke, effluent and combustion products during cooking and idle.
3.Listed energy recovery devices with a sensible heat recovery effectiveness of not less than 40 percent on not less than 50 percent of the total exhaust airflow.
TYPE OF HOOD LIGHT-DUTY EQUIPMENT MEDIUM-DUTY EQUIPMENT HEAVY-DUTY EQUIPMENT EXTRA-HEAVY-DUTY EQUIPMENT
C403.2.9Duct and plenum insulation and sealing.
1.Where located within equipment.
2.Where the design temperature difference between the interior and exterior of the duct or plenum is not greater than 15°F (8°C).
C403.2.9.1Duct construction.
C403.2.9.1.1Low-pressure duct systems.
C403.2.9.1.2Medium-pressure duct systems.
Ducts and plenums designed to operate at a static pressure greater than 2 inches water gauge (w.g.) (498 Pa) but less than 3 inches w.g. (747 Pa) shall be insulated and sealed in accordance with Section C403.2.9. Pressure classifications specific to the duct system shall be clearly indicated on the construction documents in accordance with the International Mechanical Code.
C403.2.9.1.3High-pressure duct systems.
C403.2.10Piping insulation.
1.Factory-installed piping within HVAC equipment tested and rated in accordance with a test procedure referenced by this code.
2.Factory-installed piping within room fan-coils and unit ventilators tested and rated according to AHRI 440 (except that the sampling and variation provisions of Section 6.5 shall not apply) and AHRI 840, respectively.
3.Piping that conveys fluids that have a design operating temperature range between 60°F (15°C) and 105°F (41°C).
4.Piping that conveys fluids that have not been heated or cooled through the use of fossil fuels or electric power.
5.Strainers, control valves, and balancing valves associated with piping 1 inch (25 mm) or less in diameter.
6.Direct buried piping that conveys fluids at or below 60°F (15°C).
Conductivity Btu · in./(h · ft2· °F)b Mean Rating Temperature, °F < 1 1 to < 1 1/2 1 1/2 to < 4 4 to < 8 ≥ 8
a.For piping smaller than 11/2 inches and located in partitions within conditioned spaces, reduction of these thicknesses by 1 inch shall be permitted (before thickness adjustment required in footnote b) but not to a thickness less than 1 inch.
b.For insulation outside the stated conductivity range, the minimum thickness (T) shall be determined as follows:
K = conductivity of alternate material at mean rating temperature indicated for the applicable fluid temperature (Btu · in/h · ft2 · °F) and
c.For direct-buried heating and hot water system piping, reduction of these thicknesses by 11/2 inches (38 mm) shall be permitted (before thickness adjustment required in footnote b but not to thicknesses less than 1 inch (25 mm).
C403.2.10.1Protection of piping insulation.
C403.2.11Mechanical systems commissioning and completion requirements.
C403.2.12Air system design and control.
C403.2.12.1Allowable fan motor horsepower.
1.Hospital, vivarium and laboratory systems that utilize flow control devices on exhaust or return to maintain space pressure relationships necessary for occupant health and safety or environmental control shall be permitted to use variable volume fan power limitation.
2.Individual exhaust fans with motor nameplate horsepower of 1 hp (0.746 kW) or less are exempt from the allowable fan horsepower requirement.
Option 1: Fan system motor nameplate hp Allowable nameplate motor hp hp ≤ CFMs · 0.0011 hp ≤ CFMs · 0.0015
Option 2: Fan system bhp Allowable fan system bhp bhp ≤ CFMS · 0.00094 + A bhp ≤CFMS · 0.0013 + A
Particulate filtration credit: MERV 16 and greater andelectronically enhanced filters Pressure drop calculated at 2x clean filter pressure drop at fan system design condition.
Evaporative humidifier/cooler in series with another cooling coil Pressure drop of device at fan system design conditions.
Sound attenuation section (fans serving spaces with designbackground noise goals below NC35) 0.15 inch w.c.
C403.2.12.2Motor nameplate horsepower.
1.For fans less than 6 bhp (4413 W), 1.5 times the fan brake horsepower.
2.For fans 6 bhp (4413 W) and larger, 1.3 times the fan brake horsepower.
3.Systems complying with Section C403.2.12.1fan system motor nameplate hp (Option 1).
C403.2.12.3Fan efficiency.
1.Fans of 5 hp (3.7 kW) or less as follows:
1.1.Single fan with a motor nameplate horsepower of 5 hp (3.7 kW) or less, unless Exception 1.2 applies.
1.2.Multiple fans in series or parallel that have a combined motor nameplate horsepower of 5 hp (3.7 kW) or less and are operated as the functional equivalent of a single fan.
2.Fans that are part of equipment covered under Section C403.2.3.
3.Fans included in an equipment package certified by an approved agency for air or energy performance.
4.Powered wall/roof ventilators.
5.Fans outside the scope of AMCA 205.
6.Fans that are intended to operate only during emergency conditions.
C403.2.13Heating outside a building.
C403.2.14Refrigeration equipment performance.
EQUIPMENT TYPE APPLICATION ENERGY USE LIMITS (kWh per day)a TEST PROCEDURE
Refrigerator with solid doors Holding Temperature 0.10 · V + 2.04 AHRI 1200
Refrigerator with transparent doors 0.12 · V + 3.34
Freezers with solid doors 0.40 · V + 1.38
Freezers with transparent doors 0.75 · V + 4.10
Refrigerators/freezers with solid doors the greater of 0.12 · V + 3.34 or 0.70
Commercial refrigerators Pulldown 0.126 · V + 3.51
a.V = volume of the chiller or frozen compartment as defined in AHAM-HRF-1.
EQUIPMENT TYPE ENERGY USE LIMITS (kWh/day)a, b TEST PROCEDURE
VOP.RC.M Vertical open Remote condensing Medium 0.82 · TDA + 4.07 AHRI 1200
SVO.RC.M Semivertical open Remote condensing Medium 0.83 · TDA + 3.18
HZO.RC.M Horizontal open Remote condensing Medium 0.35 · TDA + 2.88
VOP.RC.L Vertical open Remote condensing Low 2.27 · TDA + 6.85
HZO.RC.L Horizontal open Remote condensing Low 0.57 · TDA + 6.88
VCT.RC.M Vertical transparent door Remote condensing Medium 0.22 TDA + 1.95
VCT.RC.L Verticaltransparent door Remote condensing Low 0.56 · TDA + 2.61
SOC.RC.M Service over counter Remote condensing Medium 0.51 · TDA + 0.11
VOP.SC.M Vertical open Self-contained Medium 1.74 · TDA + 4.71
SVO.SC.M Semivertical open Self-contained Medium 1.73 · TDA + 4.59
HZO.SC.M Horizontal open Self-contained Medium 0.77 · TDA + 5.55
HZO.SC.L Horizontal open Self-contained Low 1.92 · TDA + 7.08
VCT.SC.I Verticaltransparent door Self-contained Ice cream 0.67 · TDA + 3.29
VCS.SC.I Vertical solid door Self-contained Ice cream 0.38 · V + 0.88
HCT.SC.I Horizontaltransparent door Self-contained Ice cream 0.56 · TDA + 0.43
SVO.RC.L Semivertical open Remote condensing Low 2.27 · TDA + 6.85
VOP.RC.I Vertical open Remote condensing Ice cream 2.89 · TDA + 8.7
SVO.RC.I Semivertical open Remote condensing Ice cream 2.89 · TDA + 8.7
HZO.RC.I Horizontal open Remote condensing Ice cream 0.72 · TDA + 8.74
VCT.RC.I Vertical transparent door Remote condensing Ice cream 0.66 · TDA + 3.05
HCT.RC.M Horizontal transparent door Remote condensing Medium 0.16 · TDA + 0.13
HCT.RC.L Horizontaltransparent door Remote condensing Low 0.34 · TDA + 0.26
HCT.RC.I Horizontaltransparent door Remote condensing Ice cream