Geothermal Heating Systems

Geothermal heating systems, also called ground source heat pumps, are the cost effective, long term alternative to conventional heating and cooling. They operate by using the earth’s ability to store heat in soil, then capturing this heat energy and moving it from the soil to a home or building.

By using this type of heating system, a homeowner will save money each month, use less energy, and reduce the amount of pollution that is often produced with other systems. Typical geothermal heating systems transfer heat using a network of tubes, called "closed loops” or “open loops.” The loops are filled with water, refrigerant or an anti-freeze solution. A process, in which the liquid absorbs the earth’s heat and then transfers it to the building, is repeated over and over.

Geothermal heating systems can also be used for cooling during warm seasons. The process is basically reversed; heat energy from the building is transferred to the ground. This process is considered to be more energy efficient for cooling than a traditional air conditioner.

Geothermal heating systems will typically cost you between $2,500 and $7,500, depending on the size of the unit. The expected life span of this type of system is generally anywhere from 20 to 30 years. Keep in mind, traditional heating and cooling systems will run you about $4,000, and cost more to operate per month.

There are several different types of geothermal heating systems, all of which fall under a “closed loop” or “open loop” system. “Closed Loop” systems circulate a mixture of water and antifreeze through a series of sealed loops of piping. They can be installed in the ground horizontally or vertically. They can also be placed in a body of water, such as a pond. “Open Loop” systems circulate water existing from a ground or surface water source.

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