Electric heaters are over 90% efficient and are perfectly safe for use indoors or outdoors. They are also economical to operate and require little maintenance beyond periodic cleaning. Unlike gas heaters, there are no valves, ignition components, moving parts or burners to maintain or repair. In addition, electric heaters produce no sound, odors or toxic emissions. An electric heater is also easier to use. Enjoying electric comfort heat is as easy as flipping a switch. You can adjust the intensity of an electric heater infinitely from zero to 100% of power. By contrast, gas heaters only produce infrared energy on their highest possible settings.