"While it's normal for heat pumps to make some noise, a Daikin outdoor unit for example, is usually no louder than 60 decibels, just like an electric toothbrush or a normal conversation. Indoor units are even quieter, making a gentle whirring noise which measures 30 decibels at most. For context, that's quieter than a refrigerator and as soft as a whisper."
"Sometimes planning officers and environmental health officers don't agree on heat pumps either," says Leah Robson, co-director of Your Energy Your Way and member of Heating Trades Network UK."
"Environmental health will usually look at noise, which is why we carry out a recognised Microgeneration Certification Scheme (MCS) noise assessment and produce a report as part of any air source heat pump installation," she says."
Air source heat pumps have external components that can prompt neighbour concerns, primarily about outdoor noise and garden enjoyment. Complaints from neighbours are valid only when installations breach regulations or exceed permitted noise levels. Many modern heat pumps are quieter than expected: outdoor units can measure around 60 decibels, comparable to an electric toothbrush or conversation, while indoor units can be about 30 decibels and quieter than a refrigerator. Environmental health officers tend to focus on noise impact, and recognised Microgeneration Certification Scheme (MCS) noise assessments and reports are commonly produced to address and prevent neighbour disputes.
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