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How does a heat pump work?

The earth absorbs and stores heat from the sun year after year, providing us with a constant source of naturally renewed energy. Just a few feet under the ground, there is a constant average temperature of 4-12 degrees Celsius.  This energy represents a vast reserve of low-grade heat waiting to be used.

The GSHP gathers heat from the solar energy stored underground, either using collectors buried at a shallow depth, or from boreholes.  The heat is transferred from the ground to the heat pump using a mixture of water and an environmentally-friendly anti-freeze solution within a designed collector array, circulating through closed loops, absorbing thermal energy from the earth and carrying it to the heat pump.  The pipes pass an evaporator (1) conducting the heat to the refrigerant.

The refrigerant circulates as a fluid within the heat pump, running at -17, when the heat from the ground is introduced to the antifreeze it boils and expands and is then squeezed within a compressor (2) causing a chemical reaction creating 3-4 times the energy utilized by the compressor. 

The heated fluid then passes to the heating system's heat exchanger (3) and heats your hot water and home. 

Once that heat has been delivered, the refrigerant cools and needs to expand back to its original non-excited volume (4).  Then the cycle starts all over again.

How does a heat pump work?

In conclusion the ground delivers 75% of the energy and the heat pump 25%.  So, if your home needs 20kWs per hour to keep it warm, you only pay for 25%*, 5kWs, the ground has given you the rest for free and without carbon.

You use less and cost less to the planet!




Customer Stories

Barn Conversion

"Heating a home like this was never going to be easy, but Snugg made it so easy. I never even think about the system, it runs itself"

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Detached House

"We wanted a system that would give us energy security with little to know hassle in running. Our ground source heat pump is fantastic. I cannot believe how easy it is to control and how low our bills are. The house is toasty. Best choice we could have made."

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New Build - Detached House

"I still cannot believe how cheap heating this house is. Snugg were great at laying out all the facts and figures, but I didn’t quite believe it until my first bill came in, along with my RHI payments"

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New Barn House

"it was great dealing with Snugg, not only did they do a great job installing the system, they’ve carried on looking after me"

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Snugg Systems Ltd is a company registered in England and Wales with company number 11529968.