Burnham® Gas Boiler, 6-Section, Series: Series X-PV, Natural Gas Fuel, 130 mbh Net IBR, 175 mbh Input, NPT Connection, Spark Ignition, 150 mbh DOE Heating, 85 % AFUE, 5 gal Water/Steam Content, 3 in Flue Outlet, Chimney/Direct/Power Vent, Cast Iron Housing Material, Floor Mounting, 21-1/2 in W x 26-1/2 in D x 37-3/4 in H Dimensions, Domestic