Trane offers both ground- and air-based heat pumps, which extract warmth from outside and transfer it indoors using electricity. While heat pumps can work throughout most of the United States, Trane recommends their units for Southern states.
Warm air naturally flows to colder areas. Heat pumps, however, are able to reverse this flow using electricity. If the air or ground is warm, heat pumps are typically cheaper to run than furnaces and boilers. When there is little warmth to be captured, however, they can be significantly more expensive.
Trane heat pumps, like most heat pumps, can also be reversed, removing heat from the home and transferring it outside the structure. In this mode, heat pumps offer similar efficiency to air conditioners, making them popular in areas that need both heating and cooling. Its models also include an emergency heating mode that uses resistance heating. This mode uses far more electricity because it functions similarly to older electrical heaters.
Trane also sells both air- and ground-source heat pumps. Determining which type is better for a particular structure can be a difficult task; the ambient temperature and soil properties affect performance. In general, air-source heat pumps cost less and are easier to install.