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More than Hot Air

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How Does a Geothermal HVAC System Work?

 Air Filter You might have heard about geothermal systems and how they can save you up to 70% on your heating and air conditioning bills. But exactly how do they work?

The Basic Idea

Once you dig five or six feet into the earth, the temperature of the ground is a constant 50-60 degrees Fahrenheit. The ground stays this temperature year-round, no matter how hot or cold it is on the surface. Geothermal systems take advantage of this constant temperature to efficiently heat and cool your home.

Components of a Geothermal HVAC System

A geothermal heating and cooling system will consist of three main parts: the ground loop, the heat pump and the heating and cooling distribution system.

The ground loop is a series of pipes in the ground. A special water mixture flows through these pipes to extract the heat (or coolness) from the ground. The heat pump allows the liquid from the ground loop to help heat or cool your home. The heating and cooling distribution system transfers the coolness or warmth throughout your home, often through a forced air setup.

How Geothermal Works

In the winter, the water mixture flows through the ground loop. The heat from the ground warms it up. The warmed water mixture flows to the heat pump, which uses this mixture to help it warm the air. The warm air blows through the ducts throughout the home.

In the summer, the heat pump removes heat from inside your home and transfers it to the water mixture. It then flows into the ground loop, essentially dumping the heat into the earth. This is similar to how most air conditioners work. A geothermal unit is much more efficient, however, because instead of dumping the heat from the home into the outside air, it dumps it into ground.

But why is that more efficient? When heat is dumping into the air as opposed to the ground, the outside air gets hotter. Under those conditions, the typical air conditioner becomes less efficient and therefore has to work much harder to cool the air inside your home.

If you want the most efficient heating and air conditioning system available, you should strongly consider a geothermal HVAC system. To learn more about the benefits, contact our team at Jerry’s Air Conditioning and Heating online.

Jerry's Air Conditioning & Heating



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