What is a Ground Source Heat Pump (GSHP)?
A Ground Source Heat Pump circulates a mixture of water and antifreeze around a loop of pipe which is buried in your garden and this is called a ground loop. The ground acts as a very large store of heat energy which can be used as a heat source during winter or summer so the heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. This is then transferred into the property for heating and hot water.
How does a Ground Source Heat Pump work?
Heat from the ground is absorbed at low temperature into a fluid inside the ground loop. The fluid, which is a mixture of water and anti freeze then passes through a compressor which raises it to a higher temperature. From here, it will then heat water for the heating and hot water circuits of the house.
Once the heat has been used, the cooled ground loop fluid passes back into the ground where it repeats the process continuously for as long as heat is required.
The ground loop can be laid horizontally in a trench about a meter or so below ground. If you do not have enough space for this process, then you can drill vertical boreholes which as typically 90 – 160 meters deep.
Why choose a Ground Source Heat Pump?
Under the UK Government’s domestic Renewable Heat Incentive (RHI) scheme, you could receive quarterly cash payments over seven years if you install or have already installed an eligible renewable heating technology
What is the RHI?
The Renewable Heat Incentive (RHI) is a UK Government scheme set up to encourage uptake of renewable heat technologies amongst householders, communities and businesses through financial incentives. It is the first of its kind in the world and the UK Government expects the RHI to contribute towards the 2020 ambition of 12% of heating coming from renewable sources.
The domestic RHI was launched on 9th April 2014 and provides financial support to the owner of the renewable heating system for seven years. The scheme covers England, Wales and Scotland and is targeted at - but not limited to - off-gas households.