Equipment Shelter Utility Calculator

  • 1. Shelter Parameters
  • 2. Building Results
  • 3. HVAC Systems
  • 4. Calculation

Use this calculator to compare the estimated energy usage of different HVAC systems. The output can be used to support energy rebate applications or to simply predict/verify that your HVAC system is operating as expected.

Once you select the models you'd like to compare, you can edit the default values to test how variations impact results.

For bulk requests, please send an excel or csv file with all the required fields directly to:
ASNSupport@air-sys.com

Building Parametrrs

Cooling Setpoint (°F)*:
Heating Setpoint (°F)*:
Length (ft.)*:
Width (ft.)*:
Height (ft.)*:
Wall Insulation R Value (ft2•°F•h/BTU)*:
Ceiling Insulation R Value (ft2•°F•h/BTU)*:
Floor Insulation R Value (ft2•°F•h/BTU)*:
Lighting (W)*:
Passive Ventilation (CFM)*:

Design Outdoor Temperature

Summer Design Outdoor Temperature (°F)*:
Winter Design Outdoor Temperature (°F)*:

Equipment Load

Equipment Load (BTU/h)*:

Site/Project Name

Project Name*:

Sensible Cooling Load

Heat Gain from Wall/Ceiling/Floor (BTU/h)
Heat Gain from Ventilation (BTU/h)
Heat Gain from Lighting (BTU/h)
Heat Gain from Equipment (BTU/h)
Total Sensible Cooling Load (BTU/h)
Design Margin
Design Sensible Cooling Load (BTU/h)
Design Heating Load (BTU/h)
Sensible Capacity Derating (1)

Heating Load

Heat Loss from Wall/Ceiling/Floor (BTU/h)
Heat Loss from Ventilation (BTU/h)
Heat Gain from Lighting (BTU/h)
Heat Gain from Equipment (BTU/h)
Total Heating Load (BTU/h)

Recommended Wall Packaged Unit

Recommended Wall Pack Unit Quantity (2)
Recommended Wall Pack Unit Size
Minimum Heater Size (3) (kW)
Sensible Capacity @ 95F ODT (BTU/h)
De-rated Sensible Capacity (BTU/h)

System 1

Manufacturer*:
Model*:
Number of Units*:
Free Cooling Configuration*:
Free Cooling Humidity Control Scheme*:
Max OD Dry Bulb Temp for FC (F)*:
Compressor Type*:
DX Total Btu @ 80/67F return 95°F OD*:
DX Sensible Btu @ 80/67F return 95°F OD*:
DX EER @ 80/67F return 95°F OD*:
Airflow Configuration*:
Free Cooling Fan Motor Type*:
Max Free Cool Air Volume (CFM)*:
Max Free Cool Fan Power (Watts)*:
Allowed Free Cool Air Volume (CFM)*:
Minimum Free Cooling Temperature*:
Allow Partial Free Cooling*:
Free Cooling Temperature Loss (°F) e.g. ducting*:

System 2

Manufacturer*:
Model*:
Number of Units*:
Free Cooling Configuration*:
Free Cooling Humidity Control Scheme*:
Max OD Dry Bulb Temp for FC (F)*:
Compressor Type*:
DX Total Btu @ 80/67F return 95°F OD*:
DX Sensible Btu @ 80/67F return 95°F OD*:
DX EER @ 80/67F return 95°F OD*:
Airflow Configuration*:
Free Cooling Fan Motor Type*:
Max Free Cool Air Volume (CFM)*:
Max Free Cool Fan Power (Watts)*:
Allowed Free Cool Air Volume (CFM)*:
Minimum Free Cooling Temperature*:
Allow Partial Free Cooling*:
Free Cooling Temperature Loss (°F) e.g. ducting*:

Weather Model

Country*:
State*:
Weather Station*:

Email

Email*:

Utility Rate ($/kWh)

Utility Rate*:
Site/Project Name:
Date:
kWh/yr
100% FC Hours
Annual Utility Cost
kWh/yr
100% FC Hours
Annual Utility Cost
Energy Saving (kWh/yr):
Utility Cost Saving:

Weather Model

State:
Weather Station:
Equipment Load (Btu):
Cooling Setpoint (F):
Heating Setpoint (F):