50 gallon, self-cleaning liquid propane (LP) water heater. Tall, 37,000 BTU's, 1.5" insulation. For installations from sea level to 10,100', .60 Energy Factor. Unit dimensions: 60-3/4" height x 21" diameter, draft diverter outlet size: 3" with integrated adapter for 4" vent option. T & P relief valve, glass lined tank, magnesium anode rod, PEX polymer linedheat trap nipples. Self-cleaning PEX dip tube, Next Generation FVIR Approved. Stainless steel flame arrestor, air intake entire base of heater, door mounted manual reset temperature cut off. Self powered Honeywell Millivolt Generator Gas Control Valve. 9 year tank & parts warranty. Not for use in mobile/manufactured homes. Meets new NAECA 2015 Efficiency Standards.