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 In. 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 In. W. x 10-1/4 In. H. Wall can dimensions: 14-1/2 In. W. x 11-1/2 In. H. x 4 In. D. Grill dimensions: 16-3/4 In. W. x 12 In. H. White. UL (Underwriters Laboratories) listed.