PLANNING ESTIMATE

Garage heater-size calculator

Estimate a broad heating-output range using garage volume, envelope quality, temperature rise, and climate exposure. This is not professional HVAC design.

How this estimate works

The calculation estimates conductive and infiltration-related load from building volume and temperature difference, then applies transparent envelope and climate factors. The wide range acknowledges unknown air leakage, thermal bridges, door opening, recovery time, and internal gains.