Geothermal Heat Pump Installers in the DMV

A geothermal heat pump, also called a ground-source heat pump, moves heat between the house and the ground through a buried loop. The ground a few feet down holds a steadier temperature than DMV winter and summer air, which is why these systems keep their output on the coldest January nights and the most humid August afternoons.

The listings below say they install or service geothermal or ground-source systems. Geothermal is two jobs: the loop in the ground and the equipment in the house. Ask who drills or digs the loop, whether it will be vertical bores or horizontal trenches, what the lot needs for access, and who handles the well or drilling permit with your county. Ask for the heat loss calculation that sets the loop length, since an undersized loop is the costly mistake in this trade.

Geothermal is common on larger lots in Frederick, Carroll, Howard and Loudoun counties, and less common inside the Beltway where lots are tight. Get at least two quotes, and compare loop length and design along with price.