Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-20204 - Section C202.4-D

Current through Register Vol. 24-14, July 15, 2024
DATA ACQUISITION SYSTEM.
An electronic system
				managed by the building owner to collect, tabulate and display metering
				information.
DATA CENTER.
A room or series of rooms that share
data center systems
whose primary function is to house
				equipment for the processing and storage of electronic data, which has a design
				total
information technology equipment (ITE)
power density
				exceeding 20 watts per square foot (215 watts per
				m2) of conditioned area and a total design
ITE
equipment load greater than 10 kW.
DATA CENTER SYSTEMS.
HVAC systems, electrical
				systems, equipment, or portions thereof used to condition
ITE
or electrical systems in a
data
				center
.
DAYLIGHT RESPONSIVE CONTROL.
A device or system
				that provides automatic control of electric light levels based on the amount of
				daylight in a space.
DAYLIGHT ZONE.
The portion of the building
				interior floor area that is illuminated by natural daylight through sidelit and
				toplit fenestration.
DECORATIVE APPLIANCE, VENTED.
A vented appliance
				wherein the primary function lies in the aesthetic effect of the flames.
DEDICATED OUTDOOR AIR SYSTEM (DOAS).
A ventilation
				system that supplies 100 percent outdoor air primarily for the purpose of
				ventilation without requiring operation of a space-conditioning system fan for
				outdoor air delivery.
DEMAND CONTROL KITCHEN VENTILATION (DCKV).
A
				system that provides automatic, continuous control over exhaust hood, where
				required, and make-up air fan speed in response to one or more sensors that
				monitor cooking activity or through direct communication with cooking
				appliances.
DEMAND CONTROL VENTILATION (DCV).
A ventilation
				system capability that provides for the automatic reduction of outdoor air
				intake below design rates when the actual occupancy of spaces served by the
				system is less than design occupancy.
DEMAND RECIRCULATION WATER SYSTEM.
A water
				distribution system having one or more recirculation pumps that pump water from
				a heated water supply pipe back to the heated water source through a cold water
				supply pipe.
DEMAND RESPONSE SIGNAL.
A signal that indicates a
				price or a request to modify electricity consumption for a limited time
				period.
DEMAND RESPONSIVE CONTROL.
A control capable of
				receiving and automatically responding to a
demand response
				signal
.
DESICCANT DEHUMIDIFICATION SYSTEM.
A mechanical
				dehumidification technology that uses a solid or liquid material to remove
				moisture from the air.
DIRECT DIGITAL CONTROL (DDC).
A type of control
				where controlled and monitored analog or binary data such as temperature and
				contact closures are converted to digital format for manipulation and
				calculations by a digital computer or microprocessor, then converted back to
				analog or binary form to control physical devices.
DIRECTLY OWNED OFF-SITE RENEWABLE ENERGY SYSTEM.
An off-site renewable energy system owned by the building project owner.
DISTRICT ENERGY EFFICIENCY FACTOR.
Ratio of site
				energy input at the district plant required to produce a unit of heating or
				cooling at the project site on an annual basis, supported by calculations
				approved by the
code official
.
DOOR, GARAGE.
Nonswinging doors rated by DASMA 105
				with a single panel or horizontally hinged sectional panels.
DOOR, NONSWINGING.
Roll-up, tilt-up, metal coiling
				and sliding doors, access hatches, and all other doors that are not swinging
				doors or garage doors with less than or equal to 14 percent glazing.
DOOR, SWINGING.
Doors that are hinged on one side
				and revolving doors.
DUCT.
A tube or conduit utilized for conveying
				air. The air passages of self-contained systems are not to be construed as air
				ducts.
DUCT SYSTEM.
A continuous passageway for the
				transmission of air that, in addition to ducts, includes duct fittings,
				dampers, plenums, fans and accessory air-handling equipment and
				appliances.
DWELLING UNIT.
A single unit providing complete
				independent living facilities for one or more persons, including permanent
				provisions for living, sleeping, eating, cooking and sanitation.
DX-DEDICATED OUTDOOR AIR SYSTEM UNITS (DX-DOAS
				UNITS).
A type of air-cooled, water-cooled or water source factory
				assembled product that dehumidifies 100 percent outdoor air to a low dew point
				and includes reheat that is capable of controlling the supply dry-bulb
				temperature of the dehumidified air to the designated supply air temperature.
				This conditioned outdoor air is then delivered directly or indirectly to the
				conditioned spaces. It may precondition outdoor air by containing an enthalpy
				wheel, sensible wheel, desiccant wheel, plate heat exchanger, heat pipes, or
				other heat or mass transfer apparatus.
DYNAMIC GLAZING.
Any fenestration product that has
				the fully reversible ability to change its performance properties, including
U
-factor, SHGC, or VT.
Statutory Authority:
				  RCW
				    19.27A.020,
				  19.27A.025 and
				  chapters
				  19.27 and
				  34.05 RCW. 13-04-056, §
				  51-11C-20204, filed 2/1/13, effective
				  7/1/13.