Ground Source Heat Pump

How does a Ground source heat pumps work?

Ground source heat pumps (GSHPs) use pipes that are buried underground to extract heat from the ground, which is then used to heat radiators, underfloor or warm air heating systems and hot water in your home.

A ground source heat pump circulates a mixture of water and antifreeze around a loop of pipe, called a ground loop, which is buried in your garden. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. As the ground stays at a fairly constant temperature under the surface, the heat pump can be used throughout the year.

The length of the ground loop depends on the size of your home and the amount of heat you need. Longer loops can draw more heat from the ground, but need more space to be buried in. If space is limited, a vertical borehole can be drilled instead.

Ground source heat pumps (GSHP) are generally more expensive to run than an ASHP (air source heat pump) also you have a much higher upfront cost sometimes double the cost of an ASHP because of the work involved also the equipment cost is higher. On the up side you receive more Renewable Heat Incentive to help cover the cost. A ground source heat pump installation will need a large patch of suable ground/land for the ground loops the main unit will need to be housed indoors in a large utility room or plant room. GSHP are mainly used for heating larger properties with bigger heat demand than the average house.

The payback from the RHI generally gives a better payback than an ASHP on domestic installations within the 7 years.

Both ASHP and GSHP offer commercial RHI payments over a much longer period being 20 years so the return on investment is much higher.

Either domestic or commercial its worthwhile investigating which heating system is most beneficial. Book a free Home or Commercial Energy Assessment or contact us for more information.

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