Heat pumps are the heating system of choice for new builds, with a clear preference for this technology outlined in the Future Homes Standards. When building multiple properties, or upgrading densely packed housing stock, noise is often mentioned, particularly by heat pump detractors. Despite the fact that heat pumps are fairly quiet, housebuilders must consider resident concerns. Rick Clarke, Product Manager, from NIBE, looks at the facts around heat pump noise and the options to quieten the hum.
Heat pump noise seems to be a particular concern of UK residents; people in the UK search for information about ‘noisy heat pumps’ on Google more than any other country in the world – over four times as much as the second location on this list (which is incidentally the US). The rest of Europe looks so infrequently for heat pump noise related issues that it barely registers in Google’s global search traffic data.
It seems that the odd heat pump end user (or neighbour of a heat pump owner) that has an issue with noise makes the headlines, used as a tool by the heat pump naysayers to discredit the widescale viability of this technology. There are actually only around 100 noise complaints for every 300,000 installations – a rate of 0.03% – according to a survey by noise experts cited in a research paper by Apex Acoustics.
But, with heat pumps being deployed on a grand scale in new housing stock in particular, and changes to permitted development in the pipeline, including scrapping the rule that an Air Source Heat Pump (ASHP) unit must be one metre from a neighbour’s boundary, the potential for dissatisfaction could rise, making noise reducing products and correct installation all the more important.
Quiet by-design
A modern heat pump, installed properly, shouldn’t make any more noise than a refrigerator – or a boiler! NIBE S2125 is one of the quietest heat pumps on the market and also boasts a flow temperature of up to 75⁰C, ideal for high-end developments.
It’s not just our premium range that benefits from low noise – all NIBE Air Source Heat Pumps (ASHPs) are equipped with a Silent Mode, allowing the system to operate more quietly at night, for example. NIBE’s ranges feature ASHPs and Ground Source Heat Pumps (GSHP), with options for all types of properties.
Quiet installation
Under MCS rules, the sound pressure level of a heat pump at normal operating speeds should be equal to or lower than 42 dB. If a sound assessment shows noise is likely to be higher than this, then planning permission is needed.
Apart from choosing the quietest heat pump, installation best-practice is crucial. Avoiding barriers near the heat pump, such as brick walls or fences, can reduce the sound pressure levels that reach neighbouring properties. Minimising the number of reflective surfaces that surround the heat pump will also reduce the sound pressure.
When installed, the heat pump unit must be sited on a secure base. NIBE provides ASHPs with adjustable feet as standard, as well as additional antivibration mounts for floor standing units to reduce noise levels.
Evolved to meet the UK market
There’s sometimes a view in the UK that heat pumps are ‘new’; they’re not, they’re well-established and highly evolved with the versatility to meet the needs of all manner of housing and customers. Heat pump noise is a manageable challenge that nine times out of ten becomes a non-issue with the right product, system design and installation.
Why choose NIBE?
End-to-end solution: NIBE offers an end-to-end solution for your projects. From initial design work, training and installation support through to aftersales care and bespoke marketing support, NIBE will provide support the entire way.
Peace of mind: NIBE provides sustainable climate solutions, allowing your projects to be completed with full compliance to local building regulations. Whether new build or retrofit, our heat pumps can offer the solution. Your customer will also receive a two-year warranty.
Innovative product: Our air, ground, and exhaust air heat pumps, combined with a fully integrated smart home system, provide industry leading solutions. From multi-source ground & PV-T installations, to our innovative indoor-only S735 exhaust air heating, hot water and ventilation module, NIBE can provide the solution
Global sustainability experts: NIBE is an established global company, with over 70 years’ experience developing energy-efficient and sustainable building services solutions. Headquartered in Sweden, but with operations in the UK and across the world, we are one of Europe’s leading heat pump brands. By combining renewable energy with smart technology, NIBE delivers the ultimate in low carbon, user friendly home heating, ventilation, hot water and cooling, creating perfect indoor climates with minimal environmental impact.