Understanding Geothermal Cooling Technology

Geothermal heating and cooling diagramAt Hoff Heating & AC, we work with traditional heating and cooling systems to keep Missouri homes comfortable. In the cooling season, your air conditioning unit uses electricity to blow cool air into your home and vent warm air outside. We also specialize in another kind of home comfort system, geothermal cooling and heating systems. The key to your home cooling comfort may be right under your lawn.

Stable Temperatures Underground

If you have ever been to a cave, you already know how geothermal systems work. Even in the hottest part of the year, the cave system will maintain a constant, cool temperature. Once you get about 6 feet under your lawn, you will also find a fairly constant temperature regardless of how hot or cold it is above ground.

A geothermal system involves installing a loop of plastic tubes under your lawn. These tubes are attached to a heat pump unit in your home. They circulate a water-based solution that will transfer warmth from the earth in the heating season and transfer heat from your home during the cooling season.

Geothermal Advantages

The initial investment in geothermal heating can be high as there will be excavation and construction costs. However, once the system is in place, it offers great advantages over traditional furnaces and air conditioning units.

Environmentally Friendly

Geothermal is a renewable resource as it does not consume fuel. Instead, it takes advantage of the constant source of heating and cooling under the earth. This decreases the carbon footprint of your home.


Geothermal systems are quiet. You have probably grown accustomed to the many noises that your current home comfort systems make. Because much of the action in a geothermal system happens underground, there is less noise to deal with.


Geothermal systems are also less expensive to operate. You will no longer be paying heating fuel bills in the winter, and the system does not use as much electricity as most air conditioners. In addition, because geothermal systems use a passive energy source, there are fewer parts that can break down or need replacement. Some estimates suggest that a single geothermal system can last for 50 years.

It the mission of Hoff Heating & AC to keep your home comfortable in every season. We can help you with all your heating, cooling, and indoor air quality needs. If you have any questions about a geothermal system or any comfort system for your home, contact our office in O’Fallon.

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