Model and type of heat pump that’s right for you depends on your lifestyle and budget. We work with air-source plus water-source heat pump units. Air source heat pumps are the most common. They extract heat from the indoor air when cooling the house and from the outdoor air when heating the house. Water source heat pumps extract heat from water bodies like rivers, large ponds, lakes, and boreholes. They use a network of pipes submerged in the water to trap the heat.