Skip navigation

Geothermal Loop Systems


In order to utilize the ambient heat stored in the ground beneath and around your home, geothermal heating and cooling systems rely on an underground loop system to harness that energy. There are a few different types of loop systems and different ways in which they can be installed. A number of factors can affect which loop system and installation method is best for you, so call the professionals at Air Mechanical to find out which combination is best for your Andover, MN home.

Types of Geothermal Systems

Of the four basic ground loop systems available for geothermal heating and cooling systems, three of them are closed loop systems. The fourth is an open. There is no option that is necessarily better than any other. Before the decision can be made as to which option is the best for installation in your Andover home a number of factors must be considered. Soil conditions, weather, land availability and other factors all affect the overall appropriateness of these systems. Read on to learn more about each of these systems and be sure to call the geothermal installation, maintenance repair and replacement experts at Air Mechanical with any questions you may have.

Closed Loop Systems

There are three main types of closed loop systems. Generally, these closed loop systems circulate antifreeze through the loop system buried in the ground or under water. This is how heat is gathered for transfer. There is refrigerant within the heat pump itself, and a heat exchanger transfers heat between the refrigerant and the antifreeze.

Horizontal Installation of Closed Loop Systems

When it comes to residential installations, horizontal installation is usually the most unobtrusive, cost effective option. Sufficient land space is necessary, enough to accommodate trenches that are dug to a depth of at least four feet. The pipes lie within these trenches. If a shorter trench is necessary, pipe can be looped to allow for more pipe to fit into a shorter trench.

Closed Loop Vertical Installation

For large commercial buildings where land is more of an issue, vertical loop installations may be a better option. If soil is too shallow for trenching closed loops are a good alternative as well. Holes much be drilled between 100 and 400 feet deep, and pipes connected with a U–joint are inserted into the holes. Horizontal pipes are connected to these vertical loops.

Pond or Lake Loop Installations

Pond or lake installations can be the cheapest option for a loop system installation if there is an adequate body of water on the property. The loop system must be installed at least eight feet below surface level to eliminate the risk of freezing. Have the professionals at Air Mechanical evaluate the body of water on your land to see if it is appropriate for this type of loop installation.

Open Loop Systems

With an open loop system water itself is used as the heat exchange fluid, circulating through the geothermal heating and cooling system directly. The water is returned to the ground when the circulation is complete. There must be an adequate water supply in order to use this method, of course, so let the geothermal experts at Air Mechanical evaluate your water situation.

Call Air Mechanical for Geothermal Loop System Information in Andover, MN

If you have any unanswered questions about the types, operation or installation of loop systems available to you, call Air Mechanical today. Our staff has the knowledge, experience and training to answer all of your geothermal loop system questions.