Geothermal Loop Design

Precision Comfort Systems in Hamilton County has the most experience in geothermal loop design in Central Indiana. But what do we mean when we say “geothermal loop design?”

The geothermal earth loop is how heat is moved from the ground to the home in the winter. Most who are familiar with these house-to-earth linking systems, simply refer to the outside portion as “the loop”.

There are several ways to link your home to the ground for the most efficient, geothermal home heating and cooling. Here are the two basic types:

  • Open loop – an open loop is simply a well, pumping ground water to your geothermal heat pump and then discharging it in an appropriate location outside.
  • Closed loop – a closed loop is a series of buried pipes that circulate liquid in a continuous circle from the heat source (ground or body of water) to the home and then back out again.

Here are some pictures to help see the different types of geothermal loop designs:

Horizontal geothermal loop

Horizontal Loops

Often used when adequate land surface is available. Depending on needs of the geothermal system and space available, pipes are placed in trenches that range in length from 100 to 400 feet.




Vertical geothermal loop

Vertical Loops

This is the ideal choice for a geothermal heat pump when available land surface is limited. Well drilling equipment is used to bore small-diameter holes from 100 to 400 feet deep. This loop design will fit on most residential lots.




Vertihorizontal Bore geothermal Loop

Directional Bore Loops

Directional Boring has been around for years. Originally more common for electric and gas underground service installation in established neighborhoods, it is now a common method of installing a geothermal closed loop. Read more on Directional Boring.




Pond geothermal loop

Pond (Lake) Loops

Very economical to install when a large body of water is available for use by the geothermal heating and cooling system. Coils of pipe are simply placed on the bottom of the pond or lake to capture the geothermal energy.




Open geothermal loop

Open loops (Well-Water Systems)

In 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.




You should know that geothermal loop installations are a much larger undertaking than a typical air conditioner installation. In a portion of your yard, the ground is excavated to install the loop. Fortunately, Precision Comfort Systems has the most experience in getting a loop to fit on your property.