Up to 90% energy efficient with zero emissions and cost effective, low maintenance operation; Made from durable 304 stainless steel, components proudly made in the USA and supported by Infratech's exclusive Three Year Warranty; Available in wattages ranging from 3,000-6,000, lengths ranging from 33-61.25" and 8 standard colors; All WD-Series heaters are compatible with Infratech's Duplex Stack Switch and Custom Control options; Expert installation required, please consult a licensed electrician; 0 to 60 degree Mounting Angle