180,000 BTU "X-C" Series Stainless Steel Condensing Natural Gas Hot Water Boiler, Volts:120, Hertz:60, Phase:1, Efficiency:94, Ignition:Electronic Ignition, Flue Size:3", Max Operating Pressure:50 Psi, Max Water Temperature:250 Degrees F, Input Btu:180,000, Doe Heating Output Capacity:170,000, Ibr Net Rating Output:148,000, Water Connection:1"Npt In/1"Npt Out, Dims:26-1/4"H X 20"W X 18-3/4"D, Weight:160 Lbs, In Mfg Box, Made In Unknown.