The 4th Generation MRCOOL® DIY® 18K BTU 2-Zone Ductless Heat Pump Condenser is the latest in heat pump technology. This 2-zone condenser, when paired with select MRCOOL® air handlers, is capable of producing an impressive 21 SEER efficiency rating. It also has the ability to heat even when temperatures drop to -13°F. It features robust construction which includes a Gold Fin® condenser coating so it is sure to withstand exposure to the elements. As a MRCOOL® DIY® product, this heat pump is designed specifically to be used with MRCOOL's® R-410A Pre-Charged Quick Connect® Line Sets—so homeowners can avoid refrigerant handling and brazing. They are also equipped with quick connectors, so the line set can be connected to the condenser by the homeowner using only wrenches. This means the installation process can be performed without retaining the services of a certified technician. The MRCOOL® DIY® 18K system is supported by comprehensive warranty coverage, including a 7-year compressor warranty and 5-year parts protection, and eligibility for the MRCOOL® Care Program. Let the 4th Generation MRCOOL® DIY® 18K be the solution to your home’s heating and cooling needs.