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What is the difference between an open loop system and a closed loop system?

closed difference loop system
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What is the difference between an open loop system and a closed loop system?

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The difference between an open loop system and closed loop system begins with containment. Open loop systems utilize a traditional water well and draw water from the earth at a specific number of gallons per minute, based on the size requirements of the geothermal heat pump system. Open loop systems were popular at one time because they were perceived to be easier to install. As technology advances so has the concern over the environmental impact the side effects of an uncontained system have on aquifers and surface ground discharge that occurs in winter. A closed loop system is contained and is not open to aquifers. This is accomplished by digging a bore hole, placing a U-bend pipe straight down in the hole, then sealing the pipe in place with grout creating a barrier between the pipe and the earth.

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