So what are Ground Source Heat Pumps?
They're a sustainable way to heat both your water and home and a replacement for your standard gas boiler (or other alternative fuel you may be using) as they produce zero emissions.
Well how do they work exactly?
They work by taking in the natural heat which sits underground (this usually sits at a steady 10-12 degrees Celsius all year round)
You would have a unit installed inside the home, around the size of a fridge, however, there are some smaller options too for smaller homes. The unit is connected to what are called 'ground collectors' outside, and situated below the ground, either in horizontal trenches around 1.5 - 2m, deep or in vertical boreholes.
A water/refrigerant fluid (similar to antifreeze) is circulated through the ground collectors, taking in thermal energy from the ground and circulating it back to the heat pump within the home. A compressor inside the heat pump increases the temperature and it's then passed to a heat exchanger, which in-turn transfers the heat to hot water cylinders, radiators and underfloor heating to provide space heating and hot water.
Once the fluid has delivered heat to your distribution system, it's then passed through an expansion valve which cools it before the entire process starts all over again.
What are the running costs?
For every 1kW of electricity used, ground source heat pumps produce around 4kWh of usable heat energy which is an efficiency increase of 400%.
This excellent efficiency reduces your carbon footprint and delivers significant savings on your monthly energy bills when compared to Oil/LPG, so the cost of a Ground Source Heat pump and installation would more than likely be beneficial to you if you live in a more remote area, where you may not have mains gas.
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