The DRT4000 Series direct vent gas fireplaces represent affordable craftsmanship, certain to make your home both warm and alluring. This fireplace series comes standard with superbly designed high-definition logs, brilliant flames, and convenient wireless wall-mounted controls. The DRT4000 Series also offers a variety of optional accessories that will add more flair to your fireplace. Includes Seamless battery backup and provide continued operation in the event of a power outage Features Model # DRT4045DEN-B. BTU 20,000 31,000. Fuel Natural Gas. Style Traditional. View Style Front View. Venting Type Direct Vent. Combo Top/Rear flue configuration. Durable textured powder coat finish. Millivolt or electronic ignition models available. Black painted interior optional liners available . Standard tempered glass and a protective screen. Beautifully crafted high-definition ceramic fiber log set. Standard wireless wall-mounted control electronic ignition models . Electronic ignition models include seamless battery backup and provide continued operation in the event of a power outage IPI/CPI switch standard . 20 year limited warranty. Specifications Overall Dimensions 45.25 W x 21 D x 37.12 H . Framing Dimensions 45.87 W x 22 D x 41.25 H .