The XC21 central air conditioning system is rated at up to 20.5 SEER, making it one of the most efficient air conditioning units available to the residential market. Using chlorine-free R410A refrigerant, the XC21 features a two-stage scroll compressor with high and low operating levels to allow for more energy-efficient operation. The manufacturer says that the low setting is adequate to meet household cooling demands up to 80 percent of the time.
A monitor reviews system performance and can communicate with thermostats that have a “call for service” indicator. The manufacturer’s SilentComfort technology makes the XC21 13 times quieter than other air conditioning units by utilizing a patent-pending fan design, a compressor with new vibration insulators, a new sound-dampening fan grille, and a Hushtone cabinet. Lennox Industries. 800.953.6669. www.lennox.com.
