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Proudly Serving The Columbia Area Since 1985


Fulmer Heating & Cooling Blog

What Is a Geothermal Loop System?

We’ve mentioned in previous posts that the geothermal heating and cooling system is a truly exceptional way in which for homeowners to both heat and cool their homes in an efficient, environmentally friendly manner. Today, we’d like to take a closer look at one of the components that allows the geothermal system to so greatly benefit homeowners: the geothermal loop system. Because geothermal systems both draw heat out of the ground and return it there again, they must have a means by which to facilitate this heat transfer. The geothermal loop is that very means. Read on, and be sure to contact us with any questions that you have regarding the use of a geothermal system in Columbia, SC.

Closed Loops

A closed loop system is the most common approach to geothermal heating and cooling, in which a geothermal loop is buried beneath the ground, and an antifreeze solution circulates through it. This solution absorbs heat during the winter, and transfers it to the refrigerant in the heat pump system, which is then compressed in order to boost the thermal energy available for use in the home. The loop is usually installed horizontally, which requires a fair amount of space, but only shallow excavation. For homes without much surrounding property, a vertical installation may be possible. This require deeper excavation, but requires less space. The vertical system will require holes to be drilled up to 100-400 feet deep

Another option is the pond/lake system. If there is a sufficient body of water on the property, and it makes sense in terms of system layout, the loop may simply be installed within the water source. The water must be deep enough for the loop to be buried beneath the freezing point, as well. Your technician will know just what to look for in terms of depth, volume, etc.

Open Loops

In an open loop system, a body of water or a well provides the heat transfer fluid directly: water. No antifreeze solution is used, with water instead playing that part. Obviously, you need to have a sufficient supply of water to facilitate the heat transfer process, and local codes and regulations will have to be taken into consideration when determining if an open loop system is appropriate on your property.

CallĀ Fulmer Heating & Cooling today to learn more.


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