HVAC
Term | Term Definition | Options | Unit of Measure |
---|---|---|---|
Natural Ventilation Metric |
Metric used in measuring the rate of natural ventilation |
View | None |
Natural Ventilation Rate |
Average rate of natural ventilation when used. Units depend on ventilation method |
View | Unknown |
Number Of Discrete Cooling Stages |
The number of discrete operating stages, excluding "off." |
View | count |
Number Of Discrete Fan Speeds |
The number of discrete operating speeds for the supply-fan motor, excluding "off." Only used if flow control is "stepped" |
View | count |
Number of Heating Stages |
The number of heating stages, excluding "off." |
View | count |
Other HVAC Type |
Type of space conditioning equipment that is not classified as heating, cooling, or air-distribution. This category includes ventilation, dehumidification, humidification, and air cleaning systems. |
View | None |
Output Capacity |
Output capacity of equipment. |
View | MMBtu |
Part Load Ratio Below Which Hot Gas Bypass Operates |
The part load ratio of a chiller below which hot gas bypass (HGBP) operates. |
View | None |
Pipe Application |
Application of pipe |
View | None |
Pipe Configuration |
Number of pipes for distributing steam, refrigerant, or water to individual zones. |
View | None |
Pipe Insulation Thickness |
Defines how thick insulation on pipes in a heating, cooling, water heating system is. |
View | in |
Pipe Location |
Percentage of pipe length in conditioned space |
View | percent |
Refrigerant |
The type of refrigerant used in the heat pump |
View | None |
Refrigerant Charge Factor |
Used to adjust cooling efficiency for assumed slightly degraded performance if refrigerant charge is not verified through acceptance test procedures |
View | percent |
Reheat Source |
Energy source used to provide reheat energy at a terminal unit. |
View | None |
Required Ventilation Rate |
Minimum ventilation rate required by local code. |
View | cfm |
Return Duct Percent Conditioned Space |
Percentage of return duct surface area, including the air handler, that is located within conditioned space (0-1). |
View | percent |
Sequencing |
Sequencing availability of HVAC system |
View | None |
Static Pressure |
The expected or installed internal static pressure of the system at full supply fan speed including all filters, coils, and accessories. |
View | Pa |
Supply Duct Percent Conditioned Space |
Percentage of supply duct surface area that is located within conditioned space (0-1). |
View | percent |
Supply Fraction Of Duct Leakage |
Fraction of total duct leakage that is on the supply side. Remainder is assumed to be on the return side (0-1). |
View | None |
System Performance Ratio |
Ratio of annual system load to the annual system energy consumption (similar to a whole system COP). A higher value indicates less heating and/or cooling energy use to meet the loads, and therefore represents a more efficient HVAC system. SPR can be used to describe the heating, cooling, and overall HVAC systems. |
View | None |
Ventilation Rate |
Installed flow rate for mechanical ventilation system. |
View | cfm |
Ventilation Type |
Type of ventilation, and use of heat recovery |
View | None |
Water Side Economizer |
Presence of water-side economizer to provide free cooling. |
View | None |