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Is this not covered by BS 7671?

Yes that is correct. There is no means of stopping the unit other than turning the power off to the downstairs. Steve

Hi guys, I am in the middle of a dispute between my home builder as I don't have an isolator on my utility extractor fan (enviro-fan moisture activated unit). Consequently it is running on silent tickover constantly and then automatically ramps up when required. All other extractors in my...