Yes, ducted air conditioners can provide heating as well as cooling. These systems are commonly referred to as "reverse cycle" air conditioners. The term "reverse cycle" comes from the fact that they can reverse the refrigeration cycle to provide both cooling and heating functions.During hot weather, a ducted air conditioner removes heat from inside the home and expels it outdoors, effectively cooling the indoor environment. In colder weather, the ducted air conditioning system reverses the process by absorbing heat from the outside air and transferring it indoors to warm up the living spaces.