Geothermal Heat Pump Savings | Alabama Power

Geothermal Heat Pump


GeoExchange heating and cooling systems

Savings from the ground up.


Benefits at a Glance

  • Energy Savings - Customers can cut heating and cooling costs in half. Add optional hot water units to save even more.
  • Comfort - Constant temperatures are easier to maintain with GeoExchange systems.
  • Low Maintenance - Fewer mechanical components and no outdoor equipment make repairs less likely.
  • Durability - Closed-loop systems lie underground, protected from harsh weather.
  • Quiet - Enjoy your patio, pool or deck without disturbing mechanical noises.


Highest efficiency available

A GeoExchange system takes advantage of the earth's near-constant temperature* to provide the highest energy efficiency for heating and cooling available today. GeoExchange closed-loop heating and cooling systems have been at work for more than 10 years with dependable, money-saving and energy-conserving results.


How it works

The GeoExchange system connects an indoor heat pump with a matrix of outdoor buried plastic piping. The system circulates water through these underground pipes where it is warmed by the earth in the winter and cooled by the earth in the summer. This natural heating and cooling action, in conjunction with heat pump technology, can maintain indoor spaces at a constant, comfortable temperature without burning fossil fuels.


Environmentally Friendly

Regardless of whether the outside temperature is 95° or 25°, the ground temperature in cities like Atlanta, Birmingham, Savannah, Panama City or Biloxi is between 65° and 70°. These near-constant ground temperatures make it possible to use the earth's natural thermal qualities to provide energy to heat or cool your home without burning fuel and polluting the environment.


Questions & Answers

What is a GeoExchange heat pump?

An electrically powered device that uses the near-constant temperature of the earth to heat and cool your home.

What components make up a GeoExchange system?

The heat pump unit, the underground closed-loop system and the ductwork

What is a closed-loop system?

A continuous loop of special buried plastic pipe connected to the indoor heat pump. Unlike an open-loop system that draws water from a well, a closed-loop system recirculates the same water under pressure, functioning as a heat exchanger with the earth. Because the water is sealed inside the piping, it remains pure, requiring less filtering and less potential maintenance.

How long will the pipe last?

High-density polyuethylene pipe properly heat fused should last over 50 years. This material is unaffected by chemicals normally found in soil and has good conducting properties. PVC pipe should not be used.

Can anyone install the system?

Do-it-yourself installation is not recommended. It is best to employ IGSPHA or manufacturer certified technicians and contractors to install your GeoExchange system. Retrofits in buildings with existing ductwork are typically easy to install. Consult your local dealer to determine any modifications that might be necessary.

What if I need heating but have no ventilation?

GeoExchange uses no combustion and therefore needs no outside venting.

How effective is this underground system?

Conceived in the 1940s, refined heat pump designs and improved pipe materials make GeoExchange systems the most efficient heating and cooling options available today.

Will the buried pipes affect my lawn or landscape?

After installation, closed-loop piping has no affect on grass, trees and shrubs. Installation requires displacement of some turf which can be restored with grass seed or sod.

Can a GeoExchange system also heat water for my house?

Yes. Using a device called a "desuperheater," GeoExchange systems can preheat tank water to save up to 50% on water heating bills.

For more on GeoExchange heating and cooling systems, visit these websites: