Reliance 6-40-NHDST-2 40-Gallon Natural Gas Mobile Home Water Heater, Features convertible control & conversion kit to convert to LP, 32,000 BTU output, 33 GPH, 1-inch insulation, R-Value 8.00, .59 energy factor. Factory-installed T & P Valve. Must be installed with factory roof jack, shipped with unit. Dimensions: 56-1/2 H x 20-inch D. 6-year tank & parts warranty. For mobile/manufactured home installation only.