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The Basics of Geothermal HVAC Systems

by CustomHomes on Tuesday, November 10, 2015

What would you say to a HVAC system that doesn’t take up space in your home, will keep your home comfortable all year round, uses very little electricity and has been around for over sixty years? Most people wouldn’t be able to name such a system. Even fewer would think something like this exists. Yet many custom home owners are enjoying this unique feature called geothermal HVAC.

What Is Geothermal HVAC?

Geothermal HVAC uses the steady ground temperature to heat your home during the winter, cool your home during the summer, and provide hot water for daily uses. While outdoor weather temperatures fluctuate constantly, underground temperatures will stay a normal temperature from 45-degrees Fahrenheit to 75-degrees Fahrenheit depending on your latitude.

Geothermal HVAC systems consist of a heat pump and a loop system (closed-loop or open loop). The heat pump and adjoining ductwork become placed inside your home while the loop system is filled with water or an antifreeze solution and buried underground. Some geothermal systems can also be placed in water such as a pond or lake, or where there is a natural aquifer.

How Does The Geothermal HVAC System Work?

When you want to cool your home during the summer, the geothermal HVAC system draws the heat out of the rooms. It will disperse the heat into the ground or use the hot air to heat the water in your hot water tank (based on the system you have).

When you want to heat your home during the winter, the underground loops absorb heat from the ground into the water or antifreeze mixture. Then the indoor heat pump compresses the heat to an even higher temperature to disperse it through ductwork in your home.

Custom Homes Taking Advantage Of Geothermal HVAC Systems

When installed correctly by a qualified contractor and HVAC installer, these geothermal heating and cooling systems can last a lifetime. The HVAC system uses very little electricity to operate the heat pump, runs quietly, requires little maintenance and emits no greenhouse gases.

For people interested in building a new home and have the sufficient amount of land, getting a geothermal HVAC system should be considered. You will be making a cost-effective choice while enjoy a more controlled air temperature inside your home no matter what the temperature is outside.


Sources:  http://energyblog.nationalgeographic.com/2013/09/17/10-myths-about-geothermal-heating-and-cooling/, http://energy.gov/energysaver/articles/geothermal-heat-pumps, http://www.climatemaster.com/residential/how-geothermal-works/, http://www.hvac-for-beginners.com/geothermal.html

+Ken Uhrich is lead Estimator and Purchaser at Custom Home Group, a Design/Build company, located in Lancaster County, PA. You can follow Ken on Twitter: @kuhrich Or visit his company website: www.customhomegroup.com