Bosch Greenstar Gas Boiler, Condensing Heat Only, Natural/Liquid Propane Fuel, 117000 Btu/hr Net IBR, 151000 Btu/hr Input, Auto Ignition, 135000 Btu/hr DOE Heating, 95 % AFUE, 120 VAC, 6.3 A Fuse, 0.925 gal Water/Steam Content, Auto Air Vent, Floor Standing Mounting, 19-9/16 in W x 21-7/8 in D x 41 in H, Import