HVAC

Term	Term Definition	Options	Unit of Measure
Absorption Heat Source	Source of heating energy for regeneration	View	None
Absorption Stages	Number of stages in regeneration process	View	None
Active Dehumidification	Availability of an active dehumidification system (in addition to the dehumidification that takes place during normal DX cooling operation).	View	None
Air Distribution Type	Basic configuration of air-distribution equipment.	View	None
Air Side Economizer	Presence of air-side economizer to provide free cooling.	View	None
Air Side Economizer Type	Type of air economizer system associated with a cooling system.	View	None
Belt Type	Type of belt drive in fan unit	View	None
Boiler Blowdown Rate	A blowdown of the boiler is a routine operation necessary due to the increased concentration of Total Dissolved Solids - TDS - in the boiler during the steam production. The blowdown rate of a boiler depends on: steam consumption (steam used in the process and not returned as condensate to the boiler), concentration of impurities in the feed water, maximum allowable TDS in the boiler.	View	kg/hr
Boiler Insulation R Value	Insulation R-Value of hot water storage tank.	View	hr-ft2-F/Btu
Boiler Insulation Thickness	Insulation thickness of hot water storage tank. [inches]	View	in
Boiler Percent Condensate Return	The percentage of condensed steam that is returned to the boiler.	View	percent
Burner Turndown Ratio	If applicable, the turndown ratio for the burner (full input/minimum input).	View	None
Burner Type	Type of burner on boiler or furnace, if applicable.	View	None
Cell Count	The number of cells in the cooling tower. Each cell has its own fan, water flow allowing for responding to lower load conditions	View	count
Chiller Compressor Driver	Equipment driving the compressor used in a chiller	View	None
Chiller Compressor Type	Type of compressor in the chiller.	View	None
Compressor Staging	The compressor staging for the unit. Select "Single Stage" for units with single stage (on/off) control. Select "Multiple, Discrete Stages" for units with multiple compressors, discrete unloading stages, or compressors with stepped speed motors that are controlled to operate at discrete stages. Select "Variable" for compressors that operate at variable speeds or with modulating unloading.	View	None
Condenser Fan Speed Operation	The condenser fan control option used by the unit. If the unit has several constant-speed condenser fans that stage on in conjunction with multiple compressors, this should be set to ÒStepped Speed.Ó	View	None
Condenser Type	Type of condenser used for DX cooling plant.	View	None
Condensing Operation	Capability of a boiler or furnace of condensing the water vapor in the exhaust flue gas to obtain a higher efficiency.	View	None
Cooling Delivery Type	Method of delivering cooling to the zone.	View	None
Cooling Medium	Medium used to transport cooling energy from a central cooling system to individual zones.	View	None
Cooling Stage Capacity	Average capacity of each cooling stage, at ARI rated conditions, expressed as a fraction of total capacity	View	None
Cooling Type	Source of cooling. Cooling delivery is recorded in a separate data field. Use of fans or blowers by themselves without chilled air or water is not included in this definition of cooling. Stand-alone dehumidifiers are also not included.	View	None
Dehumidification Type	Dehumidification type in air-distribution system.	View	None

HVAC

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