Burnham® Gas Boiler, 3-Section, Series: Series X-PV, Natural Gas Fuel, 52 mbh Net IBR, 70 mbh Input, NPT Connection, Spark Ignition, 60 mbh DOE Heating, 85 % AFUE, 2 gal Water/Steam Content, 3 in Flue Outlet, Chimney/Direct/Power Vent, Cast Iron Housing Material, Floor Mounting, 12-3/4 in W x 26-1/2 in D x 37-3/4 in H Dimensions, Domestic