Is an Air Source Heat Pump Noisy?

Air source heat pumps are quiet pieces of equipment. It is always good to consider installation location, care should always be taken when installing to mitigate any reflected noise that may cause a nuisance.
 

Technological advancements have made modern units much quieter, but it's important to address common concerns about central heating pump noise. 

Understanding Noise Levels of Air Source Heat Pumps

There are two main terms used to define sound when it comes to ASHPs: Sound Power Level and Sound Pressure Level. Sound power is measured at the unit, whereas sound pressure is measured at certain distances.

Sound power is measured at the source of the noise emission, independent of distance or the surrounding environment. All ASHPs have their fixed sound power level displayed on the ErP label.

The Sound Pressure Level will depend on the distance from the source and the environment the ASHP is situated in. The greater the distance, the quieter the unit will sound. Sound pressure is usually calculated and is an important step in the installation of an ASHP. 

Typically, the Sound Pressure Level from heat pumps ranges from 48 to 68 decibels — comparable to a quiet refrigerator. This noise level is generally unobtrusive, but can vary based on factors like model and installation location. Advanced models often incorporate noise-reduction technologies to keep the heat pump quiet, making noisy heat pump issues less common.

The location of the heat pump plays a significant role in how noise travels. Installing the unit away from living areas can mitigate heating pump noise. Environmental conditions such as wind can also affect how noise from heat pump units is perceived. Compared to household appliances like washing machines, air source heat pumps are generally quieter, making them suitable for residential settings.

Guidelines and Regulations for Heat Pump Noise

Compliance with noise standards is essential, especially in densely populated areas. In the UK, regulations exist to manage heat pump noise and minimise disturbances to neighbours. These state that the noise from an air source heat pump cannot exceed 37dBA when measured within the nearest neighbouring property. Proper installation, including placing the unit on a solid base and away from windows, is key for reducing the risk of heat pump noise complaints.

Local councils often reference the MCS 020 a) British Standard for measuring heat pump noise levels. Most units are designed to operate within permissible noise levels, ensuring efficient heating without excessive noise. Consulting with experts can provide tailored advice on installation, helping to ensure your heat pump remains quiet and compliant with local noise regulations.

Noise levels are recorded as a standard part of an air source heat pump installation, so you can be assured that when it comes to having one fitted, your ASHP will have already met the required regulations and the likelihood of your neighbours being disturbed is very low.

Other regulations updated in May 2025 state that air source heat pumps can be installed anywhere within the property boundary, as opposed to being a minimum of one metre away from it. While this does allow you greater choice when it comes to where your unit is situated, it is still important to keep the noise regulations in mind.

Strategies for Minimising Heat Pump Noise

Strategically placing your air source heat pump is crucial for reducing noise. Install the unit away from bedrooms and living areas and consider using acoustic panels or fences to dampen noise. Insulating pipes can also prevent noise from travelling through your home.

Routine maintenance plays a key role in minimising central heating pump noise. Keeping the unit clean and free from debris not only enhances efficiency but also reduces noise levels. Regular maintenance checks can identify loose components that might contribute to a noisy heat pump. Implementing these strategies allows you to enjoy the benefits of air source heat pumps with minimal noise disruption.

Addressing Concerns About Noise Impact

When selecting an air source heat pump, it’s crucial to evaluate the pros and cons of different sizes to find the best fit for your home. Larger heat pumps generally offer advantages such as higher output capacity, suitable for larger homes or properties with greater heating demands. This increased capacity can lead to quicker heating and more stable indoor temperatures, especially in colder climates. Additionally, larger units often operate more efficiently at optimal load, potentially resulting in lower energy costs.

Modern units feature noise reduction technologies, making them much quieter than older models. The heating pump noise produced is generally akin to a standard refrigerator, unlikely to disturb nearby residents.

Are heat pumps noisy all the time? Many believe they produce continuous disruptive sounds, but most operate at low decibel levels, especially when installed correctly. Advanced settings further reduce heat pump noise during quieter periods. Users often find that the benefits of efficient heating and reduced energy bills outweigh any minor noise issues.

Testimonials frequently highlight how the advantages of air source heat pumps surpass any potential heat pump noise complaints. Users emphasise the consistency of heating and the reduction in energy costs, reassuring others that noise from heat pumps is manageable with proper installation and maintenance . Most ASHPs also have a silent mode that can be used to reduce the noise level of the outdoor unit during specified hours. However, it is worth keeping in mind that this mode can limit the performance of an air source heat pump.

Choose Baxi for Air Source Heat Pump Installations

At Baxi, we understand that it’s natural to be concerned about noise disruption when looking at having an air source heat pump installed. Our installers will work with you to ensure your unit stays within regulations and any disruption to your neighbours is kept to an absolute minimum. 

Speak to our customer service team for more about having an air source heat pump fitted at your property.