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1. | A O Smith Water Heater AOSRG45300 ManualResidential Gas Water Heaters PROMAX PLUS HIGH EFFICIENCY FEATURES MEETS ENERGY-EFFICIENCY REQUIREMENTS FOR MOST GAS UTILITY REBATE PROGRAMS 2"-thick CFC-free foam insulation, external heat traps and other energy-saving features produce minimum .62 Energy Factor, which meets Energy Star Home Program recommendations and California Title 24 requirements. HIGH EFFICIENC EFFICIENCY + PLU S 6-YEAR LIMITED TANK AND PARTS WARRANTY For complete information, consult written warranty or... Brands:A | User Manual | ENGLISH | [View] | ||||||||||