396,000 BTU Wall Mount Commercial Stainless Steel High Efficiency Modulating Condensing Direct Vent Natural Gas Hot Water Boiler, Mounting: Wall Mount, Volts:120, Hertz:60, Phase:1, Efficiency:95.1%, Ignition:Direct Spark, Flue Size:4", Max Operating Pressure:50 Psi, Max Water Temperature:250 Degrees F, Input Btu:396,000, Doe Heating Output Capacity:378,000, Ahri Net Rating Water Mbh: 329,000, Water Connection:1-1/2"Npt In/1-1/2"Npt Out, Gas Connection Size: 1, Dims:33-1/4"H X 21"W X 21-1/4"D, Weight:183 Lbs, In Mfg Box, Made In Unknown.***Propane Kit For Vgh399: 817113000(40)(Not Included)