Geothermal Images

How it Works

The technology relies on the fact that the Earth (beneath the surface) remains at a relatively constant temperature throughout the year, warmer than the air above it during the winter and cooler in the summer, very much like a cave. The geothermal heat pump takes advantage of this by transferring heat stored in the Earth or in ground water into a building during the winter, and transferring it out of the building and back into the ground during the summer.

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.

Pipe has 50 year warranty. Heat pumps are vary low maintenance…just change filters. No boilers license needed. Takes little space in building.

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.

You can use your yard, parking lot or ball field for your well field. Murray High School used the student parking lot for their wellfield. They saved $1M in construction costs in the size of their mechanical room and they never shovel or plow the parking lot as the grid of geoexchange flowing to the school below the surface keeps the parking lot snow free.

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.

Contact Information

202 N Main Street
Oakland, IA 51560-4186

Phone Number (Fred)
(712) 482-6911

Toll Free