HEATERS > REZNOR UNIT HEATERS > Garage Heater Sizing Calculator

Please Select All Four Below For Heater Sizing

Minimum BTU Output Required

Please See Note below
Smallest Model Required

NOTE: Many factors will effect the garage temperature. For example bringing in two cars that have been outside in the cold for hours will increase the time required to warm the garage. Also opening the garage door will rapidily drop the temperature.

If you require a faster recovery or less time to bring the garage to the desired temperature, choose a larger unit. Generally any increased installation costs for a larger unit are minimal or zero The only cost difference is for the heater price which tends to be minimal.

It is usually better to move up to the next heater size if there is any doubt about the adequacy of a size. Please consult your professional installer if you are still undecided.