Common HVAC Systems with typical configurations and suggested entries into the Audit Template are listed in the table below.


HVAC SystemHeating SourceCooling SourceCentral Distribution TypeDelivery Equipment TypePackaged Terminal Equipment Type*
Air Source Heat Pump
DX Heating
DX
Forced Air
Central Fan


Packaged Rooftop Unit (RTU)
Furnace
DX
Forced Air
Central Fan


Variable Refrigerant Flow
Heat Pump
DX
Refrigerant (VRF)
VRF Terminals


Through Wall A/Cs
No Heating
DX
None
Packaged Terminal Equipment
Through the Wall  AC
Window A/Cs
No Heating
DX
None
Packaged Terminal Equipment
Window AC
1 Pipe and 2 Pipe Steam distribution
Plant (Steam Boiler)
No Cooling
One Pipe Steam/Two Pipe Steam
Radiators or Convectors


Hydronic distribution
Plant (Hot Water Boiler or District Hot Water)
Plant
Hydronic
Central Fan


Vacuum steam distribution
Plant (Steam Boiler/District Steam)
No Cooling
Other (enter 'Vacuum Steam')
Radiators or Convectors


Packaged Terminal Air Conditioner (PTAC)
Electric Resistance or Furnace
DX
None
Packaged Terminal Equipment
PTAC/PTHP
Packaged Terminal Heat Pumps (PTHP)
DX
DX
None
Packaged Terminal Equipment
PTAC/PTHP
PTACs that serve heating only
Electric Resistance or Furnace
No Cooling
None
Packaged Terminal Equipment
PTAC/PTHP
Radiators
Plant (Boiler for HW/Steam Radiators) or Electric Resistance (for Electric Radiators)
No Cooling
None (for Electric Radiators); Hydronic (for HW Radiators);  or 1 pipe/2 Pipe Steam (for Steam Radiators)
Radiators


Radiant floors
Plant
Plant
Hydronic
Radiant Floor/Ceiling


VAV with HW Reheat
Plant
Plant
Hydronic
Central Fan


Electric Resistance
Electric Resistance
No Cooling
None
Electric Baseboards or Other



*Required input for New York City Energy Efficiency Reports only.