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Ground Source Heat Pumps

Ground source heat pump systems are relatively expensive to install, but given the high efficiency it is often the best heat pump option in the long run.

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What kit is required for a system?

The heat pump collects thermal energy from the ground by a “ground collector” which consists of pipework filled with water and anti-freeze. The pipes can either be laid horizontally at a depth of 1,2 meters or placed in a vertical boreholes which can be as deep as 200 meters.

The heat pump, which is usually the size of a fridge, is located internally. The other main components of the system are a how water cylinder, a buffer thank and three expansion vessels.

Ground Source Heat Pump Plant Room

Ground-source Vs Air-Source Heat Pumps

What are the differences?

A ground source system is considerably more expensive than an air source one, but a ground source is usually a better investment in the long term for the following reasons:

Ground source is more efficient than air source, as the ground is warmer than the air in the winter when most space heating is required. Both types of heat pumps use electricity, but an air-source heat pump will use around 18% more electricity than a ground source to produce the same heat.

The expected life of a ground source unit is 20 years, while the expected life of an air source heat pump is 15 years. A significant part of the cost for a ground source system is the ground collector. The ground collector will support many generations of heat pumps. It is an energy well that is likely to last for a very long time.

Borehole Drilling in London. A Ground Source Heat Pump System Providing Heating and Hot Water for 19 Flats
Jamie Greening Sales Engineer

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Frequently Asked Questions about Ground Source Heat Pumps

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