Air Source Heat Pumps

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

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

Key Points

  • Suitable for properties with limited outside space
  • Suitable for a range of domestic properties
  • Remote access available
  • High temperature ASHP available for older properties
  • ASHP operate even in extreme cold conditions -15 deg C
  • Produce water up to 80 deg C
  • Funding available via the RHI
  • Easier install and ideal for retro fit

What Are Heat Pumps?

Air Source Heat Pump

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).

Air Source Heat Pumps


An air-to-water system distributes heat via your wet central heating system.

Heat pumps work much more efficiently at a lower temperature than a standard boiler system. This makes them more suitable for underfloor heating systems or larger radiators, which give out heat at lower temperatures over longer periods of time.

Is an air source heat pump suitable for me?

To tell if an air 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 outside your home where a unit can be fitted on the ground. It will need plenty of space around it to get a good flow of air. A sunny wall is ideal.
  • 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? Air 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

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:

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

Interested? Get in touch today...

Contact the 4 Seasons Solutions team by phone or email