New in Version 3.0
HVAC Calculators
Ten practical calculators with clear formulas, examples, and smart result tools.
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Popular HVAC Calculators
Start with these useful tools or browse all 10 HVAC calculators below.
Air Changes Per Hour
Calculate or estimate air changes per hour in seconds.
BTU Cooling Load
Calculate or estimate btu cooling load in seconds.
Cooling Degree Days
Calculate or estimate cooling degree days in seconds.
Duct Air Velocity
Calculate or estimate duct air velocity in seconds.
Filter Face Velocity
Calculate or estimate filter face velocity in seconds.
Furnace Fuel Cost
Calculate or estimate furnace fuel cost in seconds.
BTU Cooling LoadOpen calculator →HVAC TonsOpen calculator →Air Changes Per HourOpen calculator →Duct Air VelocityOpen calculator →Sensible HeatOpen calculator →Heating Degree DaysOpen calculator →Cooling Degree DaysOpen calculator →Humidifier CapacityOpen calculator →Furnace Fuel CostOpen calculator →Filter Face VelocityOpen calculator →