Reznor UDZ NG 75K BTU Input, 62.25K BTU Output, Sep Comb, Unit Heater, 83% AFUE with 4 inch" Vent, 1/2"Gas Connection, 120 Volts, MOCP-15A, Dims (WxDxH) 27"Wx25.562"Dx16.75"H, 77-lbs,