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Ground source heat pump

A Ground Source Heat Pump (GSHP) is a heating system that uses the temperature in the ground as its primary energy source.

The vast majority of this energy is from the sun which is then stored in the ground or ground water. The amount of energy coming from the earth’s core that we can use is minimal. There are certain areas where ground source heat pumps can be used but they are not cost effective for the domestic Irish market.

We use two methods of energy extraction for our ground source systems:

1. Horizontal Ground Collector This involves a series of pipes that are laid in trenches at least 1m deep. The overall trench length depends on the size of the heat pump required and ground type.*

2. Vertical Collector (Borehole Collector) This method involves a specialist drilling contractor to bore a shaft or shafts to a certain depth depending on size of heat pump required and rock type.*

The pipe in both methods absorbs the grounds energy via the anti-freeze solution circulated by the heat pump. This solution exchanges this energy in the heat pump into the refrigeration circuit, which in turn increases the temperature in the heating system up to 65° C. Our average ground temperature throughout Ireland is 8° C which means that the average base temperature from where the first stage of the refrigerant cycle starts is relatively high.

Our ground source heat pumps are on average 10{0e03296e64762fb1b83dbeb3fd342838d2fa405da824e3b07eee8b48ab43bf14} more efficient than most air source heat pumps. However the initial installation cost can be considerably more which can result in a longer payback.

The unit’s controller is extremely user friendly and will give their users complete control and statistics on how the system is working.

*(Not all ground and rock types are suitable and our technicians can survey for suitability.)

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