ACV Condensing Gas Boiler, High Efficiency, Series: Prestige™ Solo, Liquid Propane/Natural Gas Fuel, 63000 Btu/hr Net IBR, 80000 Btu/hr Input, Electronic Spark Ignition, 74000 Btu/hr DOE Heating, 95 % AFUE, Direct Vent, Stainless Steel Housing Material, Wall Mounting, 19-3/4 in W x 17-5/16 in D x 36-9/16 in H