Common pre-defined HVAC System Types with default configurations are available to select in Asset Score. Selecting one of the HVAC System Types listed below from the HVAC System Type pull down menu when editing the HVAC System in Preview mode, or when adding an HVAC System in Full input mode will automatically populate the default system components listed in the table below. These (and other) system types may also be manually added and edited in Full input mode by selecting the associated Equipment types, and the Cooling and Heating sources. Heating fuel types listed are defaults that may be edited, except for Heat Pumps which may only be assigned electricity in the tool.


Additional data entry notes for selected systems, including DOAS appear below the table.


DisplayEquipment TypeDistribution TypeCooling SourceHeating SourceHeating Fuel
Packaged Rooftop Air Conditioner (RTU)Air HandlerSingle ZoneCentral DXCentral FurnaceGas
Packaged Rooftop Heat PumpAir HandlerSingle ZoneCentral DXHeat PumpElectricity
Packaged Rooftop VAV with Hot-Water ReheatAir HandlerMulti ZoneCentral DXPlant: Boiler Plant LoopGas
Packaged Rooftop VAV with Electric ReheatAir HandlerMulti ZoneCentral DXCentral FurnaceElectricity
VAV with Hot-Water Reheat*Air HandlerMulti ZonePlant: Chiller Plant LoopPlant: Boiler Plant LoopGas
VAV with Electric Reheat*Air HandlerMulti ZonePlant: Chiller Plant LoopCentral FurnaceElectricity
Warm Air FurnaceAir HandlerSingle ZoneNo CoolingCentral FurnaceGas
Ventilation Only*Air HandlerSingle ZoneNo CoolingNo Heating 
Dedicated Outdoor Air System*Air HandlerSingle ZoneVarious - see belowVarious - see belowGas/Electricity
Packaged Terminal Air Conditioner (PTAC)Zone Equipment Terminal DXCentral FurnaceGas
Window Air ConditionerZone Equipment Terminal DXNo Heating 
Baseboard*Zone Equipment No CoolingConvective BaseboardElectricity
Radiator*Zone Equipment No CoolingPlant: Boiler Plant LoopGas
Exhaust Fans*Zone Equipment No CoolingNo Heating 
Four Pipe Fan Coil UnitZone Equipment Plant: Chiller Plant LoopPlant: Boiler Plant LoopGas
Packaged Terminal Heat Pump (PTHP)Zone Equipment Terminal DXHeat PumpElectricity
Water-Loop Heat Pump*Zone Equipment Terminal DXHeat PumpElectricity
Ground Source Heat Pump*Zone Equipment Terminal DXHeat PumpElectricity
Variable Refrigerant Flow System (VRF)*Zone Equipment VRFVRFElectricity


* Asset Score Data Entry Notes:

   

VAV with Hot-Water Reheat and VAV with Electric Reheat – For water-cooled chillers, first add a Condenser Plant Loop with a Cooling Tower Plant, then add a Cooling Plant Loop with a Chiller Plant and select the Condenser Loop so the Chiller Plant Loop and Condenser Plant Loop are linked.

   

Ventilation Only – Available as a selection for Air Handlers, a ventilation only (no cooling, no heating) system may only be assigned to a block with Parking Garage (Ventilation Only) selected as the use type.

   

Dedicated Outdoor Air System (DOAS) – Available only as a selection from the System Type pull down menu on the Air Handlers screen, the following configurations are supported for DOAS Systems:


Cooling SourceHeating SourceDistribution TypeFan Control
No CoolingNo HeatingNACAV or VAV
DX CoolingFurnace (Gas Fired or Electric Resistance)Single Zone or Multi ZoneCAV or VAV
DX CoolingHeat PumpSingle ZoneCAV or VAV
Plant (Chilled Water)Plant (Hot Water)Single Zone or Multi ZoneCAV or VAV


In addition:


Two component entries need to be created and assigned for a DOAS. DOAS is considered to be a 'Ventilation' system, and will need to have either another Air Handler or a Zone Equipment added and assigned to a block as the 'Primary Heating/Cooling System' to complete the HVAC System entry.


A DOAS may be combined with any Zone Equipment System Type except Baseboard, and any Air Handler without plant loops, and with single zone distribution and constant volume fan control.

   

Convective Baseboard: Electric – May be added as a Secondary Heating and Cooling System to a block after either a Window Air Conditioner, Packaged Terminal Air Conditioner, or Four Pipe Fan Coil Unit system has been created and assigned.


Convective Baseboard: Hot Water – May be added as a Secondary Heating and Cooling System to a block after either a Window Air Conditioner, Packaged Terminal Air Conditioner, or Four Pipe Fan Coil Unit system has been created and assigned. A Heating Plant Loop must be created and linked to this selection.

   

Radiator – May be added as a Secondary Heating and Cooling System to a block after either a Window Air Conditioner, Packaged Terminal Air Conditioner, or Four Pipe Fan Coil Unit system has been created and assigned. A Heating Plant Loop must be created and linked to this selection.

   

Exhaust Fans – Two component entries need to be created and assigned for Exhaust Fans which are considered to be a 'Ventilation' system. They will need to have either another Air Handler or a Zone Equipment added and assigned to a block as the 'Primary Heating/Cooling System' to complete the HVAC System entry. Exhaust Fans may be combined with any Zone Equipment System Type except Baseboard.

   

Water-Loop Heat Pump (WLHP) – Available as a selection for Zone Equipment. Follow the steps below to create:

  1. Add a Condenser Plant Loop
  2. Select Cooling Tower as the Condenser Plant Type
  3. Add a Boiler Plant using the ‘Add a Boiler’ button
  4. Add Zone Equipment and select ‘Water-Loop Heat Pump’ from the HVAC System Type pull down menu
  5. Note that the Cooling/Heating Source, Fuel Type, and Sink/Source Type fields will have been automatically populated
  6. Select the Cooling Tower Condenser Plant Loop that was created in step one

   

Ground Source Heat Pump (GSHP) – Available as a selection for Zone Equipment. Follow the steps below to create:

  1. Add a Condenser Plant Loop
  2. Select Ground Heat Exchanger as the Condenser Plant Type
  3. Add Zone Equipment and select ‘Ground Source Heat Pump’ from the HVAC System Type pull down menu
  4. Note that the Cooling/Heating Source, Fuel Type, and Sink/Source Type fields will have been automatically populated
  5. Select the Ground Heat Exchanger Condenser Plant Loop that was created in step one

   

Variable Refrigerant Flow System (VRF) – Available as a selection for Zone Equipment. First add a VRV System, then add a Zone Equipment and select the VRF System so that they are linked. A VRF System may be combined with a DOAS.


Note: DOAS, VRF, WLHP, and GSHP system types are available only for selection in Full Input Mode. Additional default system components for Fan Control, Terminal Unit, and Condenser Loop Type are listed in Appendix C of the Data Collection Form.