Residential Heat Pumps

Best WeatherMaker 38 YDA Two Speed Heat Pump	17 SEER The Carrier WeatherMaker® Two-Speed with Puron® refrigerant is like two heat pumps in one - a low-speed unit for every day heating and cooling, and a high-speed model for extreme weather conditions. This remarkable heat pump operates at low speed up to 75% to 80% of the time to maintain even, consistent temperatures throughout your home.
Best WeatherMaker 38 YXA Two Speed Heat Pump	14 SEER Puron® refrigerant Two Speed Heat Pump Industries Quietest
Good WeatherMaker 38 YKC Two Speed Heat Pump	11 SEER High-efficiency compressor has built-in protection features and comes with a ten-year limited warranty

Source:  www.Carrier.com