Interactive planning tool

Diesel Heater Size Calculator

Estimate heat loss from space volume, insulation, and temperature difference.

Length (ft)Width (ft)Height (ft)Outside low °FTarget inside °FInsulation

—

How to use the result

Treat the output as a planning estimate. Heater labels, real burn rates, battery condition, altitude, weather, and installation details vary. Verify specifications for the exact equipment and leave a safety margin.