Q: What is a geothermal heat pump? A: A geothermal or “ground-source” heat pump is an electrically-powered device that uses the natural heat storage ability of the earth and/or the earth’s groundwater to heat and cool your home or business. We built our home in 2008 and TEC installed the geo system. It has worked flawlessly and we are very happy. Call us today to see how we can help with your geothermal heating and cooling needs.