Bosch Greenstar Combination Gas Boiler, Condensing Heating Tankless Hot Water, 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, Wall Mounting, 17-21/64 in W x 13-57/64 in D x 33-15/32 in H, Import