For heat pump installation and heat pump repairs in Knoxville & the surrounding counties, you can be sure that The Experts Pro will exceed your expectations. A heat pump is a device that moves heat from one location to another location using a mechanical means. There are two common types of heat pumps: air-source heat pumps and ground-source heat pumps, with variations on both. Both can keep your Knoxville home warm in the winter and cool in the summer. An air-source heat pump pulls its heat indoors from the outdoor air in the winter and from the indoor air in the summer. A geothermal heat pump extracts heat from the indoor air when it’s hot outside, but when it’s cold outside, it draws heat into a home from the ground.