"This TPI Indoor/Outdoor Quartz Infrared Heater offers the same powerful heat as the heaters used at bus stops. Industrial-grade quartz infrared heater instantly delivers generous amounts of heat when you need it and cools down fast when you don't. Rugged 20-gauge steel withstands years of use, indoors or outdoors - great for sheds, barns, workshops, outdoor work areas and more. Gold anodized aluminum reflectors and porcelain end caps provide 97 efficient reflectivity, broadcasting a wide 90 pattern. Resistant to moisture and thermal shock. Coiled tungsten filament in a sealed halogen-filled quartz envelope. 6in. wire pigtail leads. In galvanized with baked-on brown enamel finish. ETL listed housing. Requires hardwired connection. U.S.A. Product Style Outdoor/indoor, Product Type Radiant heater, Blower Included No, Dimensions W x D x H in. 15 x 24 x 11, Remote Included No, Thermostat Included No, Volts 480, Watts 3.2kW, Plug Type Hardwired, BTU Output 10,922. Rugged 20-gauge steel withstands years of use, indoors or outdoors Resistant to moisture and thermal shock Coiled tungsten filament in a sealed halogen-filled quartz envelope Galvanized steel with baked-on brown enamel finish"