Timberwolf Economizer Series TPS35 21"" Natural Vent Pellet Burning Stove with Up to 38 250 BTU's 45 lb. Pellet Hopper Digital Control Panel Air Wash System and Pedestal Base Model #: TPS35 Outstanding 76.3% efficiency rating Can generate up to 38,250 BTUs and heat 800 to 2,000 sq. ft. User-friendly digital control panel 120 CFM convection fan