Geothermal HVAC Breakthrough

Identification

• A geothermal system is also known as a ground-source heat pump. The system has two efficiency ratings. The cooling efficiency rating is known as the energy efficiency rating, or EER. The heating efficiency rating is known as the coefficient of performance, or COP, according to the website HVAC For Beginners. Consumers can select from hot water, central heating, or combined heating and cooling systems. Most geothermal systems in the U.S. are combined systems.

Features

• HVAC For Beginners explains that there are three primary parts to a geothermal HVAC system. Ground loops circulate water or a mixture of antifreeze and water that absorb heat from the ground or return it to the ground to either heat or cool your home. A heat pump provides hot water to a dwelling, while a duct system bring hot or cool air to your home. With a geothermal HVAC system you will have a compressor unit inside your home and the ground loops located underground.

Benefits

• Informed Building explains on its website that geothermal HVAC is beneficial primarily because it is energy efficient and results in lower energy bills. With a geothermal HVAC system, you can recapture heat from the ground and route it to your hot water heater, giving you free hot water. Additionally, Informed Building notes that geothermal systems are quieter than traditional HVAC systems and require less maintenance.

Considerations

• While installing a geothermal HVAC system results in reduced energy bills in the long run, you should keep in mind that the initial installation costs can be high. Informed Building suggests rolling the cost of a geothermal HVAC system into the mortgage if you are building a home from scratch. In that case, you can recoup an immediate return on your investment. Geothermal HVAC units can be installed in most climates; however, the type of loop system you use will depend on how much land you have.