Where to install an air source heat pump

Installing an air source heat pump is an excellent step towards improving your home's energy efficiency and reducing electricity costs. However, the location of the heat pump plays a crucial role in its performance.  

This guide offers insights into where to install your air source heat pump, the rules that you need to adhere to, and how to maximise the efficiency of your unit. Whether you’re upgrading an existing system or embarking on a new installation, understanding how to install a heat pump correctly is vital in helping achieve your energy-saving aspirations.

Distance and proximity considerations for air source heat pump installation

As a general rule, ASHPs tend to be situated at least one metre from a neighbouring property's walls. This ensures proper airflow into the system and prevents debris from gathering, which can affect performance and cause maintenance issues. 

The heat pump itself should be placed close enough to your property's exterior wall so that heat loss through pipework is minimised, but far enough away so that there is no disruption from vibrations or noise. 

Noise levels should also be considered in highly urbanised areas or where there properties close together. Whilst most air source heat pumps are relatively quiet, they are not silent, so we suggest positioning your unit away from bedrooms or where it could cause a disturbance to neighbours. 

According to updated rules which came into effect in May 2025, the noise from your heat pump must stay within a range of 37db, when measured from the nearest neighbour's habitable room. 

Suitable locations for an air source heat pump

Most air source heat pumps are situated in the back garden of the property or next to an exterior wall along the side or rear of the building itself.

ASHPs should be placed on a stable, flat base such as a raised concrete platform. This limits the impacts from vibrations and also protects it from frost and standing water. This also allows for effective drainage and ventilation around the unit.

Your unit should also be accessible for servicing and have sufficient airflow across the fan, which will be used for the heating cycle. Remember to check that this is clear of leaves and debris during the autumn months.

Locations to avoid when installing a heat pump

Though planning permission requirements regarding air source heat pumps have been relaxed, there are still some factors to consider, particularly for listed buildings or homes within conservation areas. Always check with your local authority if you have any doubts.

Keeping a heat pump at a reasonable distance from shared boundaries will prevent disputes and comply with the new noise regulations we mentioned before.

During the winter months, there may be a risk of ice in front of your heat pump, which can be mitigated by having gravel underneath it to allow condensate to safely drain into.