Find a heater with a btu output that matches your results.
How many btu to heat uninsulated garage.
The down side to a propane heater is it needs a door cracked open to refresh the oxygen in a room.
These are very effective at providing heat to large spaces they contain a blower fan connected to a heat exchanger that allows for heat to be provided directly at a desired location.
If you want to heat a garage pole barn or a workshop or any space like that the best way to do this is with one or more unit heaters.
Procom tank top propane heater double burner 30 000 btu model pctt30 propane heaters are a good low cost solution and can put out a lot of heat.
Newair s portable electric garage heater has a heating capacity of more than 19 000 btus enough for most 2 car garages in a cool climate.
Many other heating options portable electric baseboard heaters can provide an energy efficient source of warmth for smaller garages with a convenient low profile.
If desired the unit heater may be connected to a thermostat for ideal.
For the example a garage with 5 760 cubic feet requires an energy efficient electric heater rated at 28 000 btu hr 8 200 watts.
You need a heater with at least a 21 780 btu output.
3 position the garage heater in the desired location.
For example if your uninsulated garage is 484 square feet your formula is 484 200 x 9 000 or 21 780.