Solaira ALPHA High Output Commercial & Industrial Quartz Infrared Heater for outdoor or indoor area's (1500, 2000, 3000, 4000, 4500 & 6000 Watt), can be installed in tandem for up to 18kW. 5000 hour emitter life. IP23/65 rated rain & snow proof: Weatherproof casing for outdoor, uncovered use. Toughened safety glass. 120 Volt: Power Cord Length: 15 feet, plug included.