The 5th Generation MRCOOL® DIY® 9K BTU 22.5 SEER Ductless Mini-Split Heat Pump is a highly efficient solution for heating and cooling areas up to 400 sq. ft. Designed for easy DIY installation, this system eliminates the need for specialized tools or professional help, featuring a pre-charged 25-foot DIY® QuickConnect® line set (sold separately) with R-454B refrigerant that removes the need for vacuuming. With multiple control options including wireless remote, SmartHVAC app, and voice commands via Amazon Alexa/Google Assistant, this system offers year-round comfort with innovative features.