Burnham® Water Boiler, 4-Section High Efficiency, Series: X-2 Series, Liquid Propane Fuel, 77 mbh Net IBR, 105 mbh Input, NPT Connection, Spark Ignition, 88 mbh DOE Heating, 85 % AFUE, 120 VAC, <12 A, 3 gal Water/Steam Content, 5 in Flue Outlet, Chimney Vent, Cast Iron Housing Material, Floor Mounting, 16 in W x 32 in D x 40 in H, Domestic