40 gallon, gas standard tank, mobile home water heater, 35,500 btu, for installation in non- occupied areas, electronic convertible fuel control valve provides precise temperature control & operational status, standard atmospheric draft hood & venting system, piezo igniter allows safe & easy 1 hand pilot ignition, glass-lined tank, premium grade anode rod, 2" foam insulation, .62 energy factor, recovery at a 90 rise-gallons/ hours 36, first hour rating 62, d-rated to 10,100' elevation, factory installed temperature & pressure valve, polymer lined nipples allow easy water connection hook up, unit dimensions: 61-3/4"h x 20"d, hud approved, for manufactured home mobile home use only, all air for combustion & venting must be obtained from outside atmosphere, meets naeca requirements, 6 year tank & parts limited warranty.