What is a Ground Source Heat Pump? A Comprehensive Guide

What is a Ground Source Heat Pump?
A ground source heat pump (GSHP) is a renewable heating system that extracts low-temperature solar energy stored in the ground or water. It uses buried pipework to absorb this energy and then compresses it to a higher temperature to provide heating and hot water for a building all year round.

Efficiency of Ground Source Heat Pumps vs. Air Source Heat Pumps
Ground source heat pumps are generally more efficient than air source heat pumps. This is because the ground temperature in the UK typically stays between 8℃ and 12℃, while the air temperature, especially in winter, can be significantly lower. This makes extracting heat from the ground more efficient than from the air during colder periods.

Zero Rated VAT on Heat Pumps
Homeowners may be eligible for a 0% VAT rate on domestic heat pump purchases until 31st March 2027. Full details can be found on the UK government website.

Appearance of Ground Source Heat Pumps
Ground source heat pumps come in various sizes and designs. For example, the Evo range stands at 114.5 cm high and can fit in a utility room or kitchen cupboard, suitable for larger properties. The Shoebox range is smaller, at 55.5 cm high, and can fit under stairs or in cupboards, making it ideal for smaller homes or flats.




Benefits of Ground Source Heat Pumps
  • Eligible for Grants: Homeowners can apply for grants, such as the £7,500 from the government’s Boiler Upgrade Scheme, to offset installation costs.
  • Low Carbon Emissions: Ground source heat pumps emit no direct emissions, improving air quality and reducing carbon footprints.
  • Efficiency: These systems can save 30-50% on heating bills compared to oil or LPG systems.
  • Renewable Energy: Ground source heat pumps utilise natural energy sources like rivers and soil, offering a sustainable heating solution.
  • Indoor Installation: The heat pump is installed inside the property, reducing noise and visual impact.
  • Smart Heating: When combined with smart controls, ground source heat pumps optimise heating schedules and further reduce costs.
  • Versatile Installation: Suitable for a wide range of properties, from new builds to older homes.
  • Cooling Capabilities: Some ground source heat pumps can also provide cooling during the summer months.
  • Compatibility: These systems can work with other renewable technologies to enhance efficiency and sustainability.

Disadvantages of Ground Source Heat Pumps
The primary disadvantage is the high initial installation cost, which can be mitigated by various funding options.

What maintenance does a ground source heat pump need?
Ground source heat pumps require very little maintenance. Regular services to ensure optimal performance include inspecting heat collectors, checking room stats and programmers, and maintaining system pressure.

Are heat pumps noisy?
Ground source heat pumps,  are not noisy and are generally quieter compared to air source heat pumps which have external fans.

Does a heat pump work in cold weather?
Cold weather should not affect ground source heat pumps as the ground temperature remains relatively stable, ensuring efficient heating and hot water supply throughout the year.

Is planning permission required to install a ground source heat pump?
Most ground source heat pump installations do not require planning permission as they are classed as permitted development. However, some exceptions apply, such as installations involving more than one heat pump or large ground arrays.

Ground source heat pumps offer a highly efficient, sustainable, and low-maintenance alternative to traditional heating systems. Despite the higher initial installation costs, they provide significant long-term savings and environmental benefits, making them a smart choice for homeowners looking to invest in renewable energy solutions.

June 2024


How Does a Ground Source Heat Pump Work?
Ground source heat pumps exploit natural heat flow from warmer to cooler places. A cold fluid is circulated through pipework buried in the ground, absorbing low-grade heat from the surroundings. This energy is then compressed and condensed into a higher temperature, which is transferred to the property’s heating and hot water system.

REN Servicing specialises in the installation and commissioning of ground source heat pumps. If you're considering a ground source heat pump for your home, look no further. We are nationally recognised for our expertise as leading heat pump installers, proudly serving Norfolk and Suffolk.

Q: What is the average lifespan of a ground source heat pump?

Ground source heat pumps typically last around 20-25 years with minimal maintenance.

Q: Are ground source heat pumps suitable for retrofitting older homes?

Yes, they can be installed in both new and existing properties, although some retrofitting may be necessary. Please if you would like more information.

Q: How deep do the ground loops need to be buried?

The depth of ground loops varies, typically ranging from 1.2m to 3m for horizontal systems and up to 100m for vertical boreholes.

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