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How Geothermal Works

• A geothermal system utilizes a series of underground polyethylene pipes called a ground loop to capture the earth’s free-heat source.

• On the Delmarva Peninsula, the ground below the frost line remains a constant 57 degrees year round. When it's five degrees outside, it is still 57 degrees under the surface. Geothermal systems take the heat it gathers during the heating season at an efficiency approaching 500% and returns it to the earth during the cooling season making geothermal heat pumps the most efficient heating systems available.

• In the winter, a water solution circulating through pipes buried in the ground absorbs heat from the earth and carries it to the specialized geothermal furnace inside the home. This furnace concentrates the earth’s natural warmth and circulates it throughout the home through standard ductwork.

• In the summer the process is reversed: heat is extracted from the air in the house and transferred through the furnace to the ground loop piping. The water solution in the ground loop then carries the excess heat back to the earth. The only external energy needed for the geothermal system is the small amount of electricity used to operate the ground loop pump fan and compressor.








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