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HVAC Calculators
Air conditioner sizing, insulation R-value, and duct calculators.
HVAC sizing follows a simplified Manual J load calculation. The BTU calculator uses room area, ceiling height, climate zone, and insulation level to estimate cooling and heating load. The R-value calculator recommends insulation thickness by DOE climate zone.
BTU / Air Conditioner Size Calculator
HVACCalculate the correct BTU and tonnage for an air conditioner or heat pump for any room or house.
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Insulation R-Value Calculator
HVACFind the right R-value for your climate zone and calculate batts, rolls, or bags of insulation needed.
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