Compact Appliance and Alpine Home Air Products sell air conditioner heater combos. As of 2015, Compact Appliance sells air conditioner heater combos from LG, Pridiom, Friedrich, Breeze and Senville. Alpine sells their own Alpine brand central heating and cooling system alongside offerings from several different manufacturers.
As of 2015, Compact Appliance sells "mini-splits," consisting of an outdoor part and indoor part. The outdoor part, the heat pump, sends the cold or hot air to the inside part, the air handler, through copper tubes. This design leads to their main feature: the elimination of ducts. Along with mini-splits, Alpine sells central heating systems that provide both air conditioning and heating.