Air Source Heat Pumps

What Are Air Source Heat Pumps?

Think of an air source heat pump as a 'reverse fridge'. 

Heat is absorbed from the outdoor air and is compressed to raise the temperature. This then works to heat your home and hot water.


An air source heat pump is made up of an outdoor and indoor system. The outdoor system should be placed somewhere with good air flow and preferably in a sunny spot to help your air pump run more efficiently when the sun is out. The indoor unit is usually no bigger than a standard boiler. 

Air source heat pumps can be installed as one of two varieties:

Air-to-Water Heat Pumps:


These are the most common in the UK, transferring the heat into water which can then be used for traditional home heating elements.


 Air-to-Air Heat Pumps:


These work with a circulation system to heat the air itself.


Only air to water heat pumps are included in the Renewable Heat Incentive scheme and available for funding through either the ECO scheme or Green Homes Grant. 

What Are The Benefits Of An Air Source Heat Pump?

The main benefit of an air source heat pump is a more energy efficient method of heating your home, and therefore lower heating bills and carbon emissions.


This efficiency also brings a great saving on your carbon footprint of between 2,150 to 2,250 kg of carbon a year, compared to an A-rated boiler according to the Energy Saving Trust

If you are torn between an air source or ground source heat pump, then air source are considerably easier to install, and on average cost about a third less to install and need considerably less outdoor space.

They have been around for a long time and are a very reliant technology. As above they are very similar to a fridge and they do not break down often.

Will An Air Source Heat Pump Work For My Home?

Air source heat pumps offer a great alternative to gas & oil boilers but to work at their best your home needs to be a well insulated home.

If you are looking to spend money on a new heating system but insulation in your home is not up to standard, an air source heat pump would not be a sound investment for the future.

Air source heat pumps work best at producing heat at a lower temperature than boilers so if you have an draught proof home this will increase the efficiency. 

It is also worth keeping in mind that while it is possible that if you are changing from a boiler to an heat pump that you could use the existing pipework and radiators, this is not guaranteed and some or all may need to be replaced.

One potential drawback of an air source heat pump is because of the lower temperatures produced it can affect the maximum tap water temperature that your home can achieve.

Cost And Available Funding Options

The cost of an air source heat pump is dependent on a number of factors, such as model installed, size, performance/efficiency and any potential additional works needed such as pipework and radiators.

The average cost is between £7000-£15000 and you may see your annual energy bills increase by £75-£100 to run an air source heat pump.

However, as a sustainable alternative, and with help the RHI Scheme and the Green Homes Grant scheme to recompense for the initial outlay of expense for installation, it’s an attractive option for those considering their home’s contribution to carbon emissions. 

RHI tariffs continue to stay very attractive and a 4 bed property could see a payment of around £1600 per year. RHI payments continue for 7 years after installation.

If you use the Green Homes Grant to help with the initial cost of installation, this will be deducted before you receive an RHI payment. 

If I Am Interested What Should I Do Next?

If you are interested in having an Air source heat pump installed please click the 'apply button below and complete the form. We will arrange for a surveyor to contact you to arrange a free survey from one of our installation partners.

Once completed and if you are happy to continue then it is matter of arranging a grant and/or payment and picking a date for install.