Benefits of a Geothermal System

The benefits of adopting geothermal geo-exchange systems for your heating and cooling requirements include the following:

Increased Efficiency Means Cost Savings

Geothermal geo-exchange systems typically operate with a Coefficient of Performance (COP) of 4 to 5 for heating and 6 to 8 for cooling under all conditions, including temperature extremes. A geo-exchange system typically saves 25 to 80 percent on heating and cooling costs, compared to other technologies.

As the interaction is with the ground and not the air, on extreme temperature days there is generally no loss of performance.

Environmentally Friendly

The carbon footprint is significantly reduced when comparing the operating performance of these systems against conventional systems.

Existing and Historical Building Retrofits

The geothermal systems provide flexibility for the retrofitting of buildings and allowing for the character of historical buildings to be retained. Geothermal heat pumps are relatively small and can be discretely located within the building as they do not require supply or exhaust air ventilation, or sited externally. The heat exchange system is underground and invisible, hence providing virtually little to no distraction from the building's historic charm.

In replacement installations, homeowners find that any added investment over the cost of an conventional system is generally recovered in energy savings within a few years. With a long system life and less maintenance, overall life cycle costs are lower with geothermal.


Warranties for ground loops are 20 years and for heat pumps, manufacturers warranties will apply.

Quiet Operation

Geothermal geo-exchange systems have few moving parts and typically provide much quieter operation than conventional systems. The heat pumps are not noisy and should not disturb your outdoor environment or your neighbors. As a result they can also be sited in garages, sheds plant rooms or any other outdoor area.

Increased Safety and Public Health

Geothermal geo-exchange systems do not have any flame or fuel store and requires no flue or chimney.

Increased Design Flexibility

Geothermal geo-exchange systems provide optimal design flexibility because the roof, balconies and landscape can be free of chillers, air handlers and other outdoor equipment. AGS geoexchange can benefit a building's design because there is no need for unsightly and noisy rooftop or balcony equipment, such as split systems and cooling towers.

Geothermal systems have been installed internationally in commercial, industrial and residential locations from the cold climate of northern Canada and Alaska to the heat of northern Australia.

Increased Reliability and Reduced Maintenance

Geoexchange systems retain their high efficiency over the years. Since units are protected from weather conditions such as rain, snow, ice, debris, extreme temperatures or vandalism, equipment life is extended and cost of repairs is dramatically reduced. Geothermal units have proven to be very reliable and require less maintenance.

Reduced Base and Peak Load Demand

Using constant ground or water temperatures means that the geothermal geoexchange system does not contribute to the peak load problems associated with conventional air conditioning systems. This increased security of energy supply enables energy suppliers to better balance their load demands as well as minimise infrastructure requirements for remote areas.

Reduced CO2 Emissions

The heat collected by the earth loops is carbon free. For every 2.5 hours of use, a geothermal system produces one kilogram less CO2 than a conventional HVAC system. For example, where the electrical source is a coal-fired power station, a 500 kW conventional system discharges 550 tonnes of CO2 p.a compared to 160 tonnes of CO2 p.a for a geothermal system.