The MRCOOL UNIVERSAL DIY AC & HEAT PUMP CONTINUES TO HEAT IN TEMPERATURES AS LOW AS -22! The 2 to 3 Ton 18 SEER MrCool Universal DIY Central Heat Pump Split System is an innovative heating and cooling system that will keep you cool in the summer, warm in the winter, and will save you money year-round! Unlike conventional heat pump split systems, the Universal uses a DC inverter compressor to modulate performance based on fluctuating demand. Since the MrCool Universal Central Heat Pump Split System utilizes a DC inverter compressor, it is able to operate at reduced capacity for long periods, which saves serious money. The Universal can deliver 100% cooling capacity at temperatures as high as 110 degrees Fahrenheit, 80% heating performance at minus 4 degrees, and continue producing heat down to minus 22. One of the best features of the MrCool Universal system is the Pre-Charged No-Vac Quick Connect line set. This unique line is kink resistant, precharged with R410a refrigerant, and uses Quick Connect fittings. The No-Vac lines simply plug into the condenser and air handler. No cutting, no brazing, no vacuuming, and no charging is required. It reduces hours of installation work down to minutes. This makes doing it yourself a breeze.