"Save energy while cutting fuel costs The Fireplace Radiator captures heat that normally goes up the chimney and instead sends it back into your home. Cool air is drawn from the floor via an external fan, where the air is heated in the plenum, continues out the front bar and spreads throughout the room. Works With Left side of fireplaces, Dimensions L x W x H in. 22 x 10 1/2 x 12 1/2, Includes 1 Left side fan, Material Type Cast iron, Mount Type Directly into fireplace, Control Type Manual. Variable-speed motor delivers 50-125 cu. ft. of heated air per minute Three average-sized logs can burn up to 6 hours with glass doors closed Fire is built right on the Fireplace Radiator, so there's no need for a grate Easy to install and adjustable to fit almost any fireplace, including fireplaces with wire mesh screen or glass doors"