Garage heaters are safe, as long as proper precautions are taken during installation and general use. As of 2015, certain types of garage heaters have built-in safety features, such as an auto power shut-off when knocked over or an overheating warning light.
During daily use, it is important to keep a garage heater running only when there is someone using the room. A portable garage heater should be placed on a stable surface to reduce the chances of it being knocked over. Flammable materials, such as paper and paint, should also be placed away from a garage heater to avoid accidental fires.