Most garages are not heated together with the rest of the house. If you’re going to be a significant amount of time in your garage heater, installing a garage heater is a viable option. Many people prefer the heat power due to its efficiency. Electric heaters use 100 percent of the electricity and convert it to heat. With gas heaters around 80 percent of the fuel is converted into heat, while the other 20 percent is a byproduct that is released into the air. Garages heaters are usually mounted on the ceiling in a corner opposite the garage door. This is to save space and avoid contact with people or objects that could burn with heat.
The general rule of thumb to determine the required size of a heater for a garage heater is a relationship watt 10/1 square feet of space. Most garage heaters are available in a choice of 120 or 240 volts. A 120-volt model provides up to 1,500 watts of electric heat for up to 150 square feet (9.29 meters square) of space. A 240 volt heater provides up to 5,000 watts of electric heat to an area of 500 square feet (46.45 meters square).