Burnham® Gas Boiler, 4-Section, Series: Series X-PV, Natural Gas Fuel, 78 mbh Net IBR, 105 mbh Input, NPT Connection, Spark Ignition, 90 mbh DOE Heating, 85 % AFUE, 3 gal Water/Steam Content, 3 in Flue Outlet, Chimney/Direct/Power Vent, Cast Iron Housing Material, Floor Mounting, 15-1/2 in W x 26-1/2 in D x 37-3/4 in H Dimensions, Domestic