American Hearth - Spirit Stove Cast Iron Vent-Free, Medium Matte Black, Nat

American Hearth - Spirit Stove Cast Iron Vent-Free, Medium Matte Black, Nat A Vent-Free system uses room air for combustion and delivers 99.9% of the available heat energy directly to the room. Vent-Free systems have an unmatched safety record, thanks in part to their clean-burning technology and their Oxygen Depletion Sensor, which instantly shuts off the valve if oxygen in the room drops to an unsafe level. Because no venting is required, Vent-Free systems offer more installation options. Vent-Free systems are limited to 25000 Btu and must be operated as supplemental heating sources in conjunction with a central furnace that circulates air. Feature  Unmatched efficiency – 99.9% Offers the most installation versatility Usually less expensive to buy and to install Can operate with a remote or thermostat Most systems can provide live-saving heat during a winter power outage Specifications Deluxe with 25,0000-Btu Contour Burner Dimensions 27 3/4 H x 28 1/4 W x 18 D Dim. w/Shelves 27