Navien Condensing Gas Boiler, NHB Series, 120 V, 95 % AFUE, 8000 to 80000 Btu/hr BTU, NPT Connection, Liquid Propane Gas, Natural Gas Fuel, Forced Draft Direct Vent, Ignition System: Electronic, Cold Rolled Carbon Steel, Dimensions: 24 in H x 17 in W x 13 in D
