Updated May 2025
There’s a lot of chat online about ‘noisy’ heat pumps, and you may have read stories about how they cause neighbourly disputes. Nobody wants to be a noise nuisance, but rest assured – a well-installed heat pump shouldn’t disturb you or your next-door neighbour!
Thanks to advances in technology, modern systems are much quieter than older models. In addition, new rules from May 2025 are changing how noise from air source heat pumps is assessed to ensure systems stay within strict limits. While it’s not a legal requirement, it’s still a good idea to inform your neighbours about your plans to reassure them about noise levels and any potential disruption during installation.
If you are considering replacing your gas boiler with a heat pump but are worried about noise complaints, please read on. In this article, you’ll find out just how ‘noisy’ modern heat pumps are, the government’s new 2025 rules on installation boundaries and what you should tell your neighbours before you go ahead.
Cinergi is a family-run heat pump installer with 30+ years of experience in home heating. We specialise in various renewable energy solutions, including air source heat pumps, ground source heat pumps, solar panels and EV charging stations. To get in touch, please fill out our contact form.
Please note this blog is intended for informational purposes only and not legal advice. For advice tailored to your requirements, please talk to our team, who can provide specific guidance.
Are air source heat pumps noisy?
If you’re thinking about installing an air source heat pump, you might be wondering if it’s going to be noisy – especially for you and your neighbours. The good news is that modern heat pumps are designed to be as quiet as possible.
Your installer should carry out a noise assessment to ensure compliance with noise regulations. Typically, a heat pump should be no louder than 42 decibels at a distance of 1 metre from the neighbouring property – which is pretty quiet. The planning process also includes choosing the best location to minimise any noise.
Of course, it’s fair to be concerned about noise when adding a new appliance to your home. Heat pumps are by no means silent and do emit a constant hum. However, technological advancements mean they’re much quieter than they used to be.
How loud is a heat pump in decibels?
If your neighbour is worried about noise pollution, you can reassure them that modern, quieter heat pumps have a noise output of no more than 42 decibels, which is considered ‘quiet’.
For context:
- A normal conversation is about 60 decibels
- A washing machine is around 70 decibels
- A heat pump is similar to a microwave
Since the unit is installed outside, the sound should be minimal – even when your neighbours are in their garden. That said, everyone has different levels of sensitivity to noise, and the background noise in your area plays a role, too. If you live near a busy road, for example, you probably won’t even notice it.
In short, while a heat pump does make some noise, it’s unlikely to be disruptive – especially when installed in the right location.
How can you reduce noise?
While modern air source heat pumps are designed to be quiet, there are several ways to reduce the noise. Placement is key – positioning the unit away from bedrooms, shared walls, and direct boundary lines can help reduce disturbance.
Anti-vibration mounts and soundproof barriers can absorb excess noise and prevent vibrations from travelling through walls or the ground.
Regular maintenance, such as cleaning filters and checking for loose parts, ensures the system runs efficiently and quietly. Choosing a high-quality, inverter-driven heat pump can also help, as these models adjust speed dynamically, making them quieter than older fixed-speed units.
Do I have to tell my neighbour I am installing a heat pump beforehand?
No, you don’t have to tell your neighbour you’re getting an air source heat pump – but it’s a good idea. A heads-up is a polite and considerate thing to do, especially if the installation might cause some temporary noise or disruption. A quick chat beforehand will help manage expectations and avoid any friction.
Can my neighbour object to a heat pump on my property?
If your neighbour is worried about noise or the location of your heat pump, they can raise it with the local authority. However, as long as your installation meets all the noise, size and placement regulations, there’s no issue, and no official action can be taken.
What happens if my neighbour objects to my heat pump?
If your neighbour objects to the installation of your air source heat pump, have an open and honest chat with them to find out what’s bothering them. You may be able to reach a compromise – e.g. move the unit or add additional noise reduction measures. If you can’t agree, you may need to seek mediation or guidance from your local authority.
Can my neighbour legally stop the installation?
Your neighbour can’t stop you from installing your air source heat pump (ASHP) as long as you’ve followed the rules regarding planning permission.
How to communicate with your neighbours about your heat pump installation
Keeping your neighbour informed can prevent disputes.
Here’s how:
- Inform them as early on as possible that you plan to have a heat pump installed. Tell them where you intend to place the unit and reassure them about the noise levels.
- Be considerate and try to avoid installing your heat pump near bedroom windows or shared walls.
- If they have any concerns, explain that modern heat pumps are quiet – no louder than a microwave – and are well within noise regulations
- Before installation day, inform them of any disruption, especially if you share walkways. Installation should only take a day at most.
- Keep the conversation open and encourage them to come to you directly if they have any worries or complaints after installation.
Contact Cinergi for advice on air source heat pumps
Cinergi is a trusted, certified installer of heat pumps servicing the entire South Coast of England. To book a call with one of our friendly team, please get in touch.
Conclusion
Thanks to advancing technology, relaxed planning rules and tighter noise restrictions from 29 May 2025, installing an air-source heat pump is easier than ever. While you no longer need planning permission, it’s always a good idea to keep your neighbours informed and carefully consider the placement of the external unit to minimise any disturbance. By choosing a professional installer like Cinergi, you can ensure a smooth, compliant installation that benefits your home and the environment.
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