Standard Features - R-410A chlorine-free refrigerant - High-efficiency scroll compressor - High- and low-pressure switches - Liquid refrigerant return protection - Factory-installed liquid line filter drier - Copper tube / enhanced aluminum fin coil - Service valves with sweat connections and gauge ports - Louvered sound control top for quiet operation - High-quality compressor sound blanket - AHRI certified; ETL listed With this central air conditioning system, you can enjoy top quality, high-efficiency cooling - at a refreshingly affordable price.