The MUFZ-KJ Floor-mounted H2i® Hyper-Heating INVERTER® Heat Pump Outdoor Unit pairs with the MZF-KJ Floor-mounted Indoor Unit for single-zone applications. Hyper-heating technology supplies 100% heating capacity down to 5° F and continues heating below zero degrees in cold climates. The factory applies Blue Fin anti-corrosion coating to the heat exchanger's aluminum fins for increased coil protection and longer life. Capacities: 9,000 to 18,000 BTU/H Sound: as low as 48 dB(A) SEER2: up to 28.2 HSPF2: up to 13.0 COP: up to 4.3 ENERGY STAR®: Yes