HVAC Calculators
BTU, tonnage and CFM for AC units, furnaces, heat pumps and fans.
- BTU CalculatorHeating and cooling BTU for any room.
- CFM CalculatorRequired CFM plus fan and duct size.
- HVAC CalculatorSystem tonnage, CFM and duct sizes for a home.
- Heat Loss CalculatorBTU per hour lost through walls, windows and ceiling.
- Heat Pump Size CalculatorTons, BTU and yearly running cost for a home.
- Furnace BTU CalculatorHeat loss, furnace input BTU and yearly fuel cost.
- Air Conditioner Size CalculatorCooling BTU and AC size for any room.
- Duct CFM CalculatorRequired CFM and duct size for any room.
- Bathroom Fan CFM CalculatorExhaust fan CFM by room size and fixtures.
- Watts to BTU CalculatorWatts and BTU per hour both ways, plus horsepower.