About Garage Heat Lab
Free garage heater calculator. Enter garage size, insulation and winter temperature to estimate BTU/hr, electric watts and the right heater size class, then compare electric, natural gas and propane running costs.
Garage Heat Lab is a free online calculator that helps homeowners pick the right garage heater. Enter your garage dimensions, ceiling height, insulation level and local winter design temperature to estimate heat load in BTU per hour and equivalent electric watts, then get a suggested heater size class. It also compares estimated running costs for electric, natural gas and propane heaters using your own energy prices, with explanations of the formula, insulation assumptions and safety notes. No signup required.
