NXT-I High Efficiency E.P.A Pedestal Wood Burning StoveThe Flame NXT-I steel woodstove heats a large area efficiently, with a maximum heat output of 85,000 BTUs. Exterior Dimensions: 25" Width X 29" Diameter X 33.5" Height2.9 Cu. In. FireboxHeating capacity: 1,050 to 2,000 sq ftEfficiency: 76%80,000 BTU/HREasy-to-access ash drawerAir-wash systemTested by Warnock Hersey as per applicable standards (CSA/UL/ULC and/or others)Adapter for exterior air intakeWashington State Approved