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Open Loop Systems

Open Loop SystemsIn ideal conditions, an open loop application can be the most economical type of geothermal system. These use groundwater from a well as a direct energy source.

Open loops (Well-Water Systems)

Instead of using an antifreeze solution sealed inside the buried piping, an open loop system uses water from an underground source - such as a well.

The water is pumped into the heat pump unit where the heat is extracted; the water is then discharged back into the original source.

Well water designs are the most common and most cost-effective. The well supplies both household water and water for the heat pump. Approximately three gallons per minute of well water are needed per ton of cooling capacity. A 3,000-square-foot, well-insulated home would typically require 10 to 15 gallons per minute.

Water quality is an important issue with open loop systems. Mineral deposits can build up inside the heat exchanger, iron and other impurities can clog a return well, and organic matter from ponds and lakes can quickly damage a geothermal system. Water should be tested for acidity, mineral content and corrosiveness.

Contact Sobieski Services today at to find out more about all the ways we can improve the enjoyment and comfort of your home.

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Source: WaterFurnace & Alliant Energy

New Castle County, de
(302) 993-0212

Kent County, de
(302) 883-5726

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(302) 703-4172

Delaware County, pa
(610) 268-8420

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(610) 436-6262

Cecil County, md
(410) 996-0045

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