Heat pumps, keeping your home warm with the air around it

Air source heat pumps absorbs heat from the air outside your home. This extracted heat can then be used to provide hot water, heat radiators and underfloor heating systems, or warm air convectors.

An air source heat pump extracts heat from the outside air in the same way that a fridge extracts heat from its inside. It can get heat energy from the air even when the temperature is as low as -25° C.

  • Heat Pumps can heat your home and provide hot water
  • They’re easier to install than ground source heat pumps
  • Air source heat pumps can lower your fuel bills, especially if you are replacing conventional electric heating.
  • Air source heat pumps can provide you with an income through the government’s Renewable Heat Incentive
  • Air source heat pumps can lower your home’s carbon emissions, depending on which fuel you are replacing
  • Air source heat pumps need little maintenance & don’t need fuel deliveries
think Flexi Plan. Spread the cost over a desired term to have a smaller monthly payment Pay extra to reduce interest and term  without penalties You remain in control of the term & interest Low monthly interest rate

Heat pump systems typically come with a 10 year warranty. You can expect them to operate for many years and will outlive any boiler. A yearly check by you and a more detailed check by a professional installer every 3-5 years should be sufficient. The installer should leave written details of any maintenance checks you should undertake to ensure everything is working properly. Consult with your supplier for exact maintenance requirements before you commit to installing a heat pump.

One of the yearly checks that you are likely to be advised to carry out is to check that the air inlet grill and evaporator are free of leaves or other debris. Any plants that have started to grow near the heat pump unit will also need to be removed. You may also be advised by your installer to check the central heating pressure gauge in your house from time to time. If so, you should be shown how to do this.

To prevent the heat pump from freezing in cold winter weather anti-freeze is used. Levels of anti-freeze and its concentration is one of the things that a professional installer will check when he comes to service your heat pump.

If your heat pump has external refrigeration pipes (very unusual for a domestic system) these will need to be serviced annually by a refrigeration engineer.

Air source heat pump installations In Wales and Northern Ireland require planning permission. In England and Scotland they may be considered Permitted Development, in which case you will not need planning permission, but the criteria are complex so it is always a good idea to check with your local planning office.


From 1st December 2011, domestic air source heat pump systems will be classed as Permitted Development provided that they comply with certain criteria.

  • There is no wind turbine at the property.
  • The external unit is less than 0.6 m3 in size
  • The unit is more than one metre from the edge of the householder’s property
  • It is not on a pitched roof, or near the edge of a flat roof
  • It meets additional criteria if in a conservation area, World Heritage Site or similar.

This list is not comprehensive. Read the full legislation at the government’s legislation website or contact your local planning office for full details.


A domestic installation of an air source heat pump in Scotland is currently permitted unless:

  • It would result in the presence within the curtilage of a dwelling of more than one air source heat pump
  • The air source heat pump would be situated less than 100 metres from the curtilage of another dwelling
  • The air source heat pump is visible from the road in a conservation area
  • The air source heat pump would be within a World Heritage Site or the curtilage of a listed building

In addition, before beginning the development the developer must apply to the planning authority for:

  • a determination as to whether the prior approval of the authority will be required for the siting and external appearance of the air source heat pump
  • the application also needs to be accompanied by a range of other information and a number of other conditions apply. Read the relevant Scottish legislation for details.

This list is not comprehensive. Read the full legislation at the government’s legislation website or contact your local planning office for full details.

Installation day and timescale

A member of our planning team will contact you to arrange a mutually agreeable installation date. We generally require three to five days for installation and plumb-in depending on which internal extras (if any) are opted for. We will let you know if we anticipate this extending due to variations in each project.

What we need from you

In general we need very little from you. To ensure that the project is completed in a timely fashion, we ask that you are available early on the installation days. We will need to work inside and outside of the property, so please ensure that we have access and the space required to work in. We may need to use, your electricity, water or toilet facilities, however our team will be most respectful, keep disruption to a minimum and tidy up before they leave.

Meet The Team

On the day of the installation our project manager will introduce himself and his team to you. They will also be available to answer any of your questions and alleviate any concerns that you may have.

Installation feedback

We ask that you complete a feedback form for each of our installers. These are held and reviewed in confidence.

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