Reznor UDZ NG 175K BTU Input, 145.25K BTU Output, Sep Comb, Unit Heater, 83% AFUE with 5 inch" Vent, 1/2"Gas Connection, 120 Volts, MOCP-15A, Dims (WxDxH) 38.187"Wx1Dx20.125"H, 194-lbs,