If you’re considering installing a geothermal heat pump system, you probably already know they’re among the most energy-efficient home comfort systems available. But did you know you have several geothermal options from which to choose?

Before you take the plunge, take a look at the most common models.

Closed-loop systems

This is what most people think of when they think of geothermal heat pump systems. The underground pipes are looped together in a continuous flow.

• Horizontal systems. If you have enough yard space, the pipe loops can be buried horizontally. They are usually installed 4 to 6 feet underground. In some circumstances, they can be looped in a “Slinky” style. This allows more piping to be installed in a limited space.
• Vertical systems. If your yard space is limited, or if the upper layers of your soil are not deep enough for horizontal trenches, you can still install pipe loops. Bore holes drilled deeply into the ground may be the answer. They can be hundreds of feet deep.
• Pond or lake systems. If your house sits near a body of water with enough volume and depth, the pipe loops can be installed underwater. A pipe line will be run underground, connecting the pipe loops to your house. If your home qualifies, this can be one of the most affordable and efficient options. It requires minimal digging, and water is a very rapid energy conductor.

Open-loop systems

Open-loop geothermal heat pump systems also make use of a body of water, such as a pond, lake or deep wells. This system uses the water itself as an energy-transfer medium, running it directly through the geothermal equipment. Fewer pipes are required, and they are not looped together. There are strict criteria to be met, concerning issues such as water quality, for open-loop systems.

If you are wondering which geothermal heat pump system would work best for you, give the experts at All Year Heating, Air and Solar a call. We are always happy to help Greater Sacramento homeowners find their ideal home comfort systems.

Our goal is to help educate our customers about energy and home comfort issues (specific to HVAC systems).  For more information about geothermal heat pump systems and other HVAC topics, download our free Home Comfort Resource guide.

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