21.0 SEER rating DoE Certified: Helps save you a considerable amount for heating and cooling, Designed to cool and heat rooms up to 320 sq. ft., Low Temp Operation: Operates at temperatures as low as 5F/-15C making it ideal for scenarios that requires year-round cooling, while the Heat Pump makes it a 4-season solution, Comes pre-charged with R410-A refrigerant, Active Carbon Air filter: Helps remove contaminants and impurities in the air, and dual washable filters that help provide quality air for your home