Energy Efficient. This 1 Zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 22 SEER efficiency rating. Large Coverage Area. Handler covers an area up to 750 sq. ft. Out of Sight Design. This unit has low profile installation for out of sight heating & cooling. DIY & Save Money. This means the installation process can be performed without retaining the services of a certified technician - thus saving you money! Pre-Charged Lineset included. These copper line sets come pre-charged with the precise amount of R-410A refrigerant. Works In All Environments. The capability to continue to deliver heating performance when temperatures reach -13F. MRCOOL's 4th generation DIY 18K heat pump mini split air conditioner with the Ceiling Cassette is the latest and greatest of the only ductless mini-split system on the market purposefully designed for anyone to be able to install. It is perfect for garages, workshops, sunrooms, RV's, trailers, or other spaces, especially if they don't have ductwork.