MRCOOL DIY MULTI-ZONE 2-ZONE 18K BTU CONDENSER, 4TH GEN SERIESThe 4th Generation MRCOOL DIY 18K BTU 2-Zone Ductless Heat Pump Condenser (DIY-MULTI2-18HP230) 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. For added peace of min