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There’s lots to consider when getting a heat pump. You’ll need to think about what type to get, who’ll install it, and what the running costs will be.
Some recent headlines have claimed that heat pumps are too loud for many UK homes.1 So you might also be considering how noisy your new heating system will be. It’s a common fear that a heat pump will be loud and disturb you and your neighbours. But how likely is this really?
How loud is an air source heat pump?
Early air source heat pumps were noisy, but technology has evolved – resulting in quieter, more efficient modern heat pumps. When on, they make between 40-60 decibels of noise on average, at a distance of 1 metre. This is classed as a low to average level. It’s somewhere between a quiet library and a dishwasher, and is similar to a microwave.
As a comparison, a modern combi boiler also makes a noise level between 40-60 decibels when it’s on. But a boiler is usually inside, while a heat pump is outside – so you’ll be less likely to notice noise.
Many heat pumps are certified by Quiet Mark, an independent programme linked to the UK Noise Abatement Society. Heat pumps with the mark include models from Vaillant, Samsung and Daikin.
What does a heat pump sound like?
A heat pump makes a low whirring or humming sound when it’s running.
A survey of heat pump owners by noise experts found most people surveyed didn’t notice the sound. People said they’d be more likely to hear dogs barking and nearby traffic over the sound of a heat pump. You can hold a conversation next to a heat pump without having to raise your voice.
Why does a heat pump make noise?
Heat pumps make noise when the fan pulls air into the compressor on the outdoor unit. The level of noise depends on what the heat pump is doing. The outdoor unit can be louder in colder weather, when it’s working harder to defrost, or heat water.
When the fan isn’t on, the heat pump will be almost silent. If your heat pump is installed correctly by a good installer, you shouldn’t be able to hear it inside.
When you get a heat pump through OVO, it’ll be installed by Heat Geek’s national network of award-winning installers. They’re experts in high quality heat pump installations.
Can you hear a heat pump inside your house?
If your heat pump has an indoor unit, it won’t make much noise at all as it’ll only contain valves and pumps. The outdoor unit will be unlikely to disturb you when you’re inside, even if the windows are open.
If your heat pump is making a loud noise that you can hear indoors, it might be a sign of an issue. You can get in touch with your installer who'll take a look and see if any maintenance is needed.
Will my heat pump disturb my neighbours?
Many homeowners worry that their new heat pump might cause noise disturbances for nearby neighbours. However, with proper installation and planning, heat pumps are unlikely to be a nuisance.
Professional installers take care to position the outdoor unit away from windows, shared walls, and neighbour’s properties to minimise noise impact. Because modern heat pumps typically operate between 40-60 decibels (a noise level comparable to a quiet conversation or a dishwasher) they rarely cause significant disturbance.
The sound produced is often low and consistent, making it easier to blend into typical outdoor background noise such as traffic or birdsong. If noise becomes a concern, your installer can recommend solutions like sound barriers or strategic placement to further reduce any potential disruption.
What are the regulations on heat pump noise in the UK?
In the UK, planning regulations set clear noise limits for heat pump installations to protect neighbours and maintain a peaceful environment. Specifically, the noise level from your heat pump must not exceed 42 decibels when measured at a point halfway between your heat pump and your neighbour’s property.
This legal limit helps ensure that heat pumps remain quiet enough to avoid complaints or enforcement action. A reputable heat pump installer will perform detailed noise assessments and calculations during the design phase to ensure your installation complies with these regulations. For example, OVO’s network of expert installers conducts thorough consultations to determine the best location for your heat pump and verifies that the system passes all relevant noise standards. This careful approach guarantees that your heat pump is both efficient and neighbour-friendly.