Heat Pumps

What Support Will the Government Be Offering?

The UK government is currently offering financial support through the BUS (Boiler Upgrade Scheme), which runs until 2028 to assist with the initial cost of purchasing a heat pump. Current government guidance is that no new gas boilers are to be sold after 2035.

The government is also working to ensure that the operational costs of a heat pump are no greater than those of a gas boiler.

What Are the Requirements for Installing a Heat Pump?

Heat pumps can be used in both new-build properties and existing dwellings, although they are much easier to install in new builds.

The dwelling should be well-insulated to minimise the amount of heat that can escape (for example, through walls, windows or the roof).

The internal component of the heat pump would be around the same size as an average gas boiler. A hot water cylinder is also required; however, the size depends on the property’s size.

The external heat pump unit is around one cubic metre. The placement of this part of the heat pump is very important, as improper positioning could lead to noise complaints, if not adequately mitigated.

Therefore, it is recommended that a Noise Impact Assessment is undertaken to assess any noise impact that the heat pump could have on neighbouring properties. A heat pump noise assessment is a process that verifies that it meets noise level standards and limits. This is often a planning requirement for most Local Authorities, so it is recommended that Clement Acoustics are consulted as early as possible within the project timeline, preferably before the heat pump installation.

What Noise Levels Can I Expect With a Heat Pump?

Modern heat pumps are engineered to operate quietly, typically emitting sound levels between 40 to 60 decibels when measured at 1 m. Currently, the Microgeneration Installation Standard (MCS) assessment, required to be undertaken when a heat pump is being installed, states that noise limits from these units should not exceed 42 dB measured from the nearest neighbouring property. However some local authorities such as Westminster City Council and the Royal Borough of Kensington and Chelsea requires a more robust assessment that requires the noise level to be 10-15 dB below the measured background noise level.

Due to their operational design, air source heat pumps produce louder sound levels than ground source heat pumps. The average noise output level of a ground source heat pump is around 40 dB when measured at 1 m.

Proper installation and strategic positioning are crucial to maintain compliance with noise standards.

Are There Any Disadvantages to Using Heat Pumps Instead of Gas Boilers?

Currently, heat pump installations could be costly and intrusive (e.g., bigger radiators could be required).

Any property where a heat pump is to be used would require very good insulation to ensure optimum operation. Although this may be possible in newer developments, older houses and conversion projects may find this difficult to achieve.

Engineers must be trained in the installation and maintenance of heat pumps over potentially long timescales. However, as the use of heat pumps becomes more widespread, this may not always be the case.

It is currently uncertain if rented properties will be provided with heat pumps before the 2035 deadline for the discontinuation of gas boilers.

At What Stage Should I Contact Clement Acoustics?

Local Authorities may ask for a noise impact assessment as a part of the planning permission to install an air source heat pump. It is recommended that Clement Acoustics are engaged with as early as possible within the project timeline, in order to provide the best possible service.

Why Choose Clement Acoustics for a Noise Impact Assessment?

• Expert Acoustic Consultants: We specialise in noise impact assessments for heat pumps, ensuring precise and reliable evaluations.
• Rapid Turnaround: We pride ourselves on delivering prompt assessments, facilitating seamless project progression without unnecessary delays.
• Competitive Pricing: Our services are offered at highly competitive rates, providing exceptional value.
• Comprehensive Support: Our approachable team of qualified acoustic engineers offers tailored guidance throughout your project, ensuring all planning requirements are met efficiently.