Radiant ceiling heater that provides reliable, comfortable heat. Easy to mount, low profile design with aluminum construction. Features expanded aluminum mesh grill and industry exclusive enclosed metal-sheathed element for high efficiency and long life. Built-in fan dispenses heat evenly. Automatic overheat protection and permanently lubricated motor. Simple and quick surface installation, easily mounts to standard ceiling electrical boxes (3-1/2 inch & 4 inch round, and 4 inch octagonal). Intended to provide supplemental heat and not to take the place of a home's main heat source. It is recommended to operate with Model 86W line voltage thermostat and Model 81W/61V 15-minute timer (sold separately).