BOSCH 8718543747 Singular 4000 Condensing Combi Boiler, High Efficiency, 95% AFUE, Space Heating Capacity: 19,900 – 80,000 BTU/H, Domestic Hot Water Heat Capacity: 19,900 – 155,000 BTU/H, NG or LP, Indoor Wall-Hung, Forced Draft Direct Vent