Reznor UDZ NG 250K BTU Input, 207.5K BTU Output, Sep Comb, Unit Heater, 83% AFUE with 5 inch" Vent, 3/4"Gas Connection, 120 Volts, MOCP-15A, Dims (WxDxH) 38.187"Wx40"Dx26.125"H, 224-lbs,