How it Works
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How it Works
A loop field
How it works in winter
How it works in summer

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A Closed loop Ground Source Loop Field looks like this drawing underground.  Typical boreholes are 200' deep in a grid 15' apart.  They are headered into a manifold and brought into the building to the heat pump(s) which circulate the heat in zones throughout the building.  Radiant heat or forced air heating or a hybrid of both can be used.
Water or antifreeze solution is circulated through plastic pipes buried beneath the earth's surface. During the winter, the fluid absorbs heat from the earth  which is about 50 degrees year around and carries it through the system and into the building.  It's much more efficient to bring 50 degrees to room temperature than to take outside air and heat or cool it to room temperature.

During the summer, the system reverses itself to cool the building by pulling heat from the building, carrying it through the system and placing it in the ground..

 

 

 

Heat pumps work like a refrigerator compressor, transferring heat, not making heat or cold.  That's why it's so energy efficient. 

In the late 1940's, Robert C. Webber, a cellar inventor, was experimenting with his deep freezer. He dropped the temperature in the freezer and touched the outlet pipe and almost burned his hand.

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