Geothermal heating is a type of ground source heating that uses the constant temperature of the Earth to provide energy-efficient and environmentally friendly heating for buildings. This works by circulating a fluid, usually water or a mixture of water and antifreeze, through a network of underground pipes, called a ground loop, which is buried in the ground. A heat pump amplifies the temperature of the heat absorbed from the ground and distributes it through your home’s heating system, warming your air inside.
Geothermal heating and cooling systems are efficient, sustainable, and environmentally friendly alternative to fossil fuel-based heating systems. They utilise the natural, renewable heat that is stored within the Earth to provide heating or cooling for buildings. However, it is important to note that the heat pumps themselves require electricity to operate, which may come from non-renewable sources such as fossil fuels. The environmental impact of geothermal heat pumps therefore depends on the source of the electricity used to power them.
Geo-exchange heating and cooling or geothermal as they more commonly known as systems are an excellent option for many locations in Victoria, Australia. However, the suitability of a geo-exchange system will depend on several factors, including the geology of the site, available space, and climate. The geology of the site is an important factor to consider as geo-exchange systems rely on the ability to exchange heat with the ground. Generally, locations with relatively shallow soils or hard rock geology may not be suitable for a geo-exchange system but many areas of Victoria have soils that are well suited for geo-exchange systems such as loamy soils that are found in many parts of the state. The available space is another important consideration. Geo-exchange systems require more space than traditional heating and cooling systems and this amount will depend on the size of your building and specific design of your system. Additionally, installation process may require drilling or digging so it is important to have sufficient space around your building and access to installation site
The actual amount of energy that a geo-exchange system can produce will depend on several factors, including:
It is recommended to have an annual maintenance service performed by a licensed contractor to ensure the system is operating correctly, and any issues are addressed before they become more significant problems.
The time it takes to install a geoexchange system depends on several factors. The size of the system, the complexity of its design, and the specific requirements of the building where it will be installed can all affect how long installation takes. In general, however, installation typically takes anywhere from several weeks to several months.
Geothermal or geoexchange heating and cooling systems are designed to be discreet and unobtrusive. The majority of the system’s components are either buried underground or installed inside the building, so they’re not visible once the installation is complete. The only visible components will be the indoor unit, which is in the plant room, and any necessary ductwork or piping, which will be installed in the walls, ceiling, or floors of the building. The ground loop is typically installed in a series of trenches or boreholes that are then backfilled, leaving no visible evidence of its existence.
Geothermal systems are designed to last for decades, and they can provide reliable, efficient performance for many years.
The lifespan of a geothermal or geoexchange heating and cooling system can vary depending on several factors, including the quality of the installation, the type of system, and the specific components used. In general, a well-designed and properly installed geothermal or geoexchange system can be expected to last for many decades. The ground loop, which is the primary heat exchange component of the system, is typically designed to last for 50 years or more. The indoor components, such as the heat pump and air handler, typically have a lifespan of 15-25 years, although some high-quality units may last longer.
To ensure that a geothermal or geoexchange system lasts as long as possible, it is important to have it installed by a licensed contractor who is experienced in installing these types of systems. Proper maintenance is also important to keep the system operating at peak efficiency and to avoid premature failure of components. Regular maintenance for a geothermal or geoexchange system typically includes annual inspections and cleaning.