The earth is your friend. If you let it, it will heat and cool your home. All you need is a geothermal heat pump. In this Huddle, you’ll find geothermal heat pumps that meet the Energy Star criteria (open loops have a COP of 3.6 or greater and an EER of 16.2; closed loops have a COP of 3.3 or greater and an EER of 14.1 or greater) and use 25 to 50% less electricity than conventional heating and cooling systems.