Heat Pumps

4 Seasons Solutions supply, install and maintain a range of Ground Source Heat Pumps (GSHP) in domestic and commercial applications throughout the South West. As experienced heating Engineers we provide a solution for different properties and have available various GSHP that can be specified.

The Government is committed to promote Heat pumps as part of the energy solution which will reduce your running costs and lower your Carbon emissions.

Key Points

  • Suitable for properties with outside space and large area for a ground collector
  • Suitable for a range of domestic properties
  • Remote access available
  • Ideally suited for new build
  • Funding available via the RHI
  • Produce water up to 62 deg C
  • Ground temperature stays consistently around 3-11deg C

What Are Heat Pumps?

Heat pumps are the hub of a modern, green energy system. Replacing a traditional boiler, your heat pump powers your property's heating system to take care of all of the heating and hot water demands.

Before we can recommend a heat pump system, we need to discuss your specific needs. Once we know the requirements we can then establish if your property is suitable.

Heat pumps use a small amount of electrical energy to run the compressor, pumps and electronics to enable the refrigeration process to work. It uses low grade heat via the energy in the air or ground (1) Evaporator. The compressor compresses the low temp gas into high temp gas (2). The condenser gives up its energy, changes from gas-liquid condenses via a heat exchanger and provides the heat for hot water and heating (3). The expansion vessel changes the high pressure liquid into a low pressure liquid (4).

Ground Source Heat Pumps

Ground Source Heat Pumps

Ground source heat pumps (GSHPs) use pipes which are buried in the ground to extract heat from the ground. The GSHP circulates a mixture of water and antifreeze around a loop of pipe, called a ground loop. Low grade heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. The ground stays at a fairly constant temperature under the surface, so the heat pump can be used throughout the year. This heat can then be used to heat radiators, underfloor or warm and hot water in your home.

The length of the ground loop depends on the size of your home and the amount of heat you need. Longer loops can draw more heat from the ground, but need more space to be buried in.

Is a ground source heat pump suitable for me?

To tell if an Ground source heat pump is right for you, there are a few key questions to consider:

  • Do you have somewhere to put it? You'll need a place inside your home to accommodate the equipment. You will also need room for the ground array and header pipework.
  • Is your home well insulated? Since air source heat pumps work best when producing heat at a lower temperature than traditional boilers, it's essential that your home is insulated and draught-proofed well for the heating system to be effective.
  • What fuel will you be replacing? The system will pay for itself much more quickly if it's replacing an electricity or oil heating system.
  • What type of heating system will you use? Ground source heat pumps can perform better with underfloor heating systems, although they can work with radiators if they are sized correctly.

See How Much You Could Save


Heat pumps are highly energy efficient and recognised as a renewable heat technology by European Union and the UK Renewable Energy Strategy. As a renewable technology, air source heat pumps allow opportunities for grant and tax benefits to be claimed.

Highly energy efficient heat pumps which qualify for listing on the Energy Technology List (ETL) are eligible for the Government’s Enhanced Capital Allowance (ECA) scheme. The ECA provides enhanced tax relief allowing an investment in energy saving technology to be written off against the taxable profits of the period. For more information, visit www.eca.gov.uk/etl

Renewable Heat Incentive - A great opportunity

Renewable Heat Incentive

Did you know you could qualify for a Government backed scheme to replace your fossil fuel heating system?

The Renewable Heat Incentive (RHI) supports various renewable technologies including Air and Ground Source Heat Pumps, Solar Thermal Panels. The scheme supports the home owner for a 7 year period and aims to pay for the renewable equipment and installation.

• Domestic RHI calculated from your Energy Performance Certificate (EPC)
• Must be fitted by an MCS certified installer
• Reduces CO2 emissions and running costs compared with fossil fuel systems
• Heat pumps provide all your heating and hot water requirements
• Can be retrofitted to older properties but may require up sizing radiators

How does the RHI work?

It is paid on the deemed energy usage of the building based on the Energy Performance Certificate (EPC). You will receive a payment on the kWh of the space heating load and an adjustment is applied to allow for the flow temperature and the efficiency of the heat pump (SCOP).


• Air source 10.71p/kWh paid up to maximum of 20,000 kWh
• Ground Source 20.89 p/kWh paid up to maximum of 30,000 kWh
• Solar Thermal 21.09 p/kWh based on the DHW load

What do you need to apply for the RHI?

• You will require an EPC (completed in the last 2 years)
• An MCS document provided by your installer
• Proof of purchase and cost of the system

Further details can be found on the Ofgem website: https://www.ofgem.gov.uk/environmental-programmes/domestic-rhi

The Government Scheme is being reviewed in April 2021 and recommend that you take full advantage of this opportunity prior to this date.

In most cases nearly pays for the heat pump over the 7 years

Common Questions


The Hitachi Range

Interested? Get in touch today...

Contact the 4 Seasons Solutions team by phone or email