Geothermal Heat Pump Closed Loop Systems

Geothermal heat pumps come in many different shapes and sizes. Some are bigger, some are smaller. Certain units are made for forced air applications while others are for water-to-water. But the biggest difference that matters is between geothermal heat pump closed loop and open loop systems. The loop design can make or break a geothermal installation. It is also one of the first things a homeowner will have to decide on.

A lot of homeowners have the choice made for them. Many municipal governments do not allow open loop geothermal systems to discharge water directly into the water system. Which means you are probably going to install a closed loop.

But which one is the question?


A horizontal closed loop is a very common installation type. In this closed loop system, the installer digs horizontal trenches around the home to house the buried loop. They then lay the piping flat or in a coiled pattern at the bottom of the trench. Ideally you want to lay them flat, but space considerations may require the coiled alternative. In either case, most homeowners find a horizontal geothermal heat pump closed loop adequately meets their air comfort needs.


A vertical closed loop is ideal when minimal surface area is available for installation. A vertical geothermal heat pump loop uses vertical shafts to hold the buried pipe network. This configuration allows homeowners to install a geothermal heat pump on a lot too small for horizontal loops.


As the name implies, a pond/lake loop requires access to a nearby body of surface water. The installer floats the piping on top of the water, then fills it to push the loops underwater. This installation can be very efficient, but most homeowners do not have access to a large body of water.



Your Choice

Which geothermal heat pump closed loop should you choose? Each style has clear advantages and disadvantages. Pond loops are easy and efficient. Vertical loops make installation possible on a compact surface area. Horizontal loops are flexible.

The key is to make sure that the geothermal heat pump installation you choose fits your property and needs. Call us today to get started.

0 comments (view/add)

* All fields required.

Your email address will not be published. Comments will display after being approved by our moderators. Comments may be edited for clarity.