Frigidaire 15 SEER Two-Stage Package Air Conditioner Environmentally Friendly Refrigerant: Non-ozone-depleting SmartCool 410 (R410A) refrigerant. Dependable Corrosion Resistance: Each packaged unit includes enhanced coils designed to reduce instances of coil leaks due to corrosion. Two Stages of Comfort: Two-stage cooling provides more consistent temperatures throughout the home and increased dehumidification. Earns our ecoLogic Seal: Because of its energy efficiency and comfort features, this package air conditioner qualifies for Maytag's ecoLogic green seal. ENERGY STAR Rated: Meets ENERGY STAR efficiency requirements. Protection from the Elements: A wire coil guard and never-rust mesh hail guard protect the coil from being damaged by balls, lawnmowers, hail and more. Optional Backup Heat: Electric heat strip provides up to 20 kW of heat output. 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. Designed and Assembled in the U.S.A.: Factory checked 72 times before being shipped.