Ground Source Heat Pump - GSHP Systems

Ground Source Heat Pump House Diagram

How Do They Work?

What is a Heat Pump? The best way to understand how a heat pump works is to remember that temperature and the concept of hot or cold is subjective. With the coldest possible temperature being absolute zero at -273°C, your average fridge at 5°C could be perceived as hot! Heat is energy, the more intense the energy the higher the temperature produced. 

Once you get below one meter underground the temperature remains reasonably constant at eleven degrees centigrade year round.

A ground source heat pump (GSHP System) draws ground source energy which has been absorbed from the suns rays and intensify it to increase its temperature. The hot water produced is then used to heat radiators, underfloor heating systems and hot water cylinders in your property.

A heat pump will still have some impact on the environment as they need electricity to run, but a pump can produce up to 5kWh of heat for every 1kWh of electricity used to extract it, a ratio of 5:1. And remember the heat they extract from the ground is constantly being renewed naturally by the sun, so if coupled with a Solar Photovoltaic array to account for the electricity used it is possible to have a Carbon Neutral heated property.

GSHP Slinky Installation

Running Costs

Ground Source Heat Pumps provide the best savings when compared to heating systems which use electricity, oil, coal or transported gas, with average savings of over 50%.

When compared to a properly installed, well maintained high efficiency mains gas based heating system, the savings are in the region of 20-25%, more so if the property has Solar PV installed. However, heat pumps offer some distinct advantages over gas:

  • They are extremely reliable and have an expected life span of 25 years with no loss of efficiency, 
  • Gas prices are more susceptible to seasonal price increases than electricity and we expect future gas prices to significantly increase over electricity as supplies run short.
  • No risk of gas explosions or carbon monoxide poisoning, ideal for landlords.

The Renewable Heat Incentive

The Renewable Heat Incentive (RHI)

The Renewable Heat Incentive is a government backed scheme which provides a set payment for every kilowatt hour (unit) of renewable heat required to heat and provide hot water into a property. In most cases this is deemed from an Energy Performance Certificate, but under specific circumstances it is metered.

Once the system is installed and registered  payments are made quarterly over a period of seven years. On average the RHI will pay for the cost of the installation and support some of the running costs.

GSHP Manufacturers


Kensa Ground Source Heat Pumps

Kensa Heat Pumps manufactures the UK’s widest range of ground source heat pumps, and is the confirmed number one manufacturer and supplier in the UK.

Combining engineering ingenuity and years of ground source expertise, every heat pump in the Kensa range has been designed and tested to exacting standards for optimum efficiency and ease of use.  Click Here.