Ground Source Heat Pump

Ground source heat pumps (GSHP) are the most efficient type of heat pump, but they’re also more expensive than air source heat pumps.  They work more effectively because the ground is a more consistent heat source than air.

Most GSHP installations qualify for the Renewable Heat Incentive (RHI). It’s very important to choose the right size of heat pump for the job you want it to do, but we can help you with this if required.

How they work

  1. The GSHP draws energy found in the ground or water, using pipework buried around 1 to 2m deep. Inside the pipework is an anti-freeze solution.
  2. When the solution heats up, the heat passes into a heat exchanger called an evaporator.
  3. The temperature in the ground during the winter is only around 4 or 5°C, so the heat pump uses its refrigeration circuit to increase the temperature, so it can be used to provide heating and hot water.
  4. The slightly-warmed refrigerant gas is compressed to a liquid which dramatically increases the temperature.
  5. This then goes through a second heat exchanger called a condenser, which warms the water in the central or underfloor heating system.
  6. An expansion valve turns the refrigerant liquid back into gas, so the cycle can start again.

Radiant Heating Solutions can supply GSHPs that also cool water by reversing the refrigeration process. This can then be used to keep the home cool in summer. Our single phase units offer outputs of 5kW to 22kW, whilst our three phase heat pumps give outputs of 7 to 45kW.

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Why choose Radiant Heating Solutions for your GSHP?

  • Experience and expertise. Our team have been supplying and installing GSHPs for over 25 years. We have the technical know-how to choose the right size of heat pump for any building and any heating requirements. We can also design a hybrid or integrated system that links to other energy sources, such as underfloor heating, solar PV panels, wood-burners etc, to help you save energy and money.
  • Quality products. We work with leading manufacturers to supply a wide range of high quality heat pumps that use the latest refrigeration technologies. All our products are perfectly suited for the UK climate.
  • Easy installation. Our heat pumps are easy to install by competent plumbing and heating engineers.
  • We’re members of the Ground Source Heat Pump Association and the Renewable Energy Consumer Code (RECC). This means we’re committed to upholding their standards of product and installation quality, and environmental protection. Any installations intended to qualify for RHI payments will have full Microgeneration Certification Scheme (MCS) accreditation.

About our products

All our heat pumps use inverter driven compressors with R410a refrigerant gas, 316 grade stainless steel heat exchangers and micro-processor controls. These controls provide full weather compensation to maximise energy efficiency.

The output from our heat pumps will always be sufficient for full-load heating and hot water. Many are also fitted with circulation pumps as standard.

Comparing heat pump performance

The output from our heat pumps is measured for a ground in-take temperature of 0°C and a heated water temperature of 35°C. This is the European standard measurement for ground source heat pumps and will normally be displayed as B0/W35. So when you’re comparing different heat pumps, it’s important to make sure the stated output refers to this standard.

A heat pump’s performance is referred to as the seasonal co-efficiency of performance (SCOP). This is the relationship between the amount of energy used and the amount generated. For example, if a heat pump uses 1kW of electricity and produces 4kW of heating water, the SCOP would be 4.

The performance of a GSHP will vary depending on certain conditions, for example, changes in the outside temperature and the desired water heating temperature. It’s important to take this into account when choosing the right size of heat pump.