HeatingHow Does A Geothermal System Provide Heat?

Geothermal heating is one of the most energy efficient ways to heat your home. It relies on a renewable resource, spending only a fraction of the energy that most heating systems use to create and circulate heat throughout the house. How exactly does a geothermal system work, though? Read on to find out.


Geothermal installation involves digging a trench about ten feet deep in a wide loop. If space is an issue the trench could be dug deeper for a vertical loop. Pipes are laid in this trench, using either anit-freeze or water as a medium. A central unit, essentially a heat pump, is then installed in the house. The pipes are connected to the heat pump, and the heat pump is connected to the ductwork in the house.

How It Works

As the name suggests, a geothermal heating system works by siphoning thermal energy from the ground in much the same way that other heat pumps siphon it from the air. About ten feet under the surface, the temperature remains at approximately 55-60 degrees year-round. That may seem cold, but in most environments the outside air can easily sink well below that temperature. When a geothermal system is in heating mode, it uses the anti-freeze or water in the underground pipes to transport that 54 degree thermal energy to the central unit. There, the central unit uses that extra thermal energy to help it warm the air and circulate it throughout the house.


The benefit to using this kind of system is that it doesn’t have to work nearly as hard as a traditional system to achieve the same results. A furnace, for example, will have to start from whatever the surrounding temperature is when it heats a home. A geothermal system, however, provides a much higher starting point of 54 degrees. This means that it won’t have to work nearly as hard or as long to warm air up to the proper temperature. By using a geothermal system, you can save an appreciable amount of money on your heating bills.

If you are interested in installing a geothermal heating system, call G&S Heating, Cooling & Electrical, Inc. We install heating systems throughout Mill Creek, WA.



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