The Com-Pak Twin is for the person who needs a large amount of heat but does not want to put in 2 heaters. Features include nichrome coil element for quick heat, primary and secondary thermal safeguards, powder-coat paint process. Built-in thermostat for added convenience. Variable heat settings. Fits between 16" on center studs and offers low wall placement with no cumbersome duct-work required. Wall can designed for ease of installation. Heater must be cleaned every 6 months minimum. Rough-in dimensions: 14-3/4" W. x 10-1/4" H. Wall can dimensions: 14-1/2" W. x 11-1/2" H. x 4" D. Grill dimensions: 16-3/4" W. x 12" H. White. UL (Underwriters Laboratories) listed.