Maytag 16 SEER Air Conditioner The Latest Environmentally Friendly Refrigerant: Non-ozone-depleting SmartCool 410 (R-410A) refrigerant. Durable: Galvanized steel with a polyester urethane finish. The 950-hour salt spray finish is 1.5 mil thick and resists corrosion 50% better than standard finishes. ENERGY STAR Rated: Exceeds ENERGY STAR efficiency requirements. Designed and Assembled in the U.S.A.: Factory checked 144 times before being shipped.