Are air-source heat pumps (ASHPs) noisy?

There will be some noise - check technical literature on manufacturers' websites for figures. Worcester Bosch quote 65 decibels (db) for the noise level at 1 metre from their unit. By comparison, normal conversation may be at a noise level of 50db, a busy office about 60db, and a busy street about 70db. The external part of an ASHP is basically the same as an air conditioning unit, but they do vary a lot - so don't judge all ASHPs by the noisiest air conditioner.


Energy Saving Trust - - 0300 123 1234
  Gives advice on saving energy in the home and local funding opportunities for renewable energy.
Microgeneration Certification Scheme - - 020 7090 1082
  The Microgeneration Certification Scheme (MCS) certifies microgeneration products and installers. MCS accreditation is required for Feed-in Tariff and Renewable Heat Incentive support.