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Shower fan isolation switch
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<blockquote data-quote="ProDave" data-source="post: 411760" data-attributes="member: 6969"><p>The question appears to be why fit a fan isolator switch?</p><p></p><p>The answer is not simple.</p><p></p><p>Now, for a timer fan, that runs on for some time after it is turned off, it does make a great deal of sense, but for a fan that just comes on and off with the light with no over run, I am not sure.</p><p></p><p>If "replacement" is the reason given, then by the same argument, every light fitting that is wired "loop at the light" should also have an isolator switch next to it so you can replace the light fitting should it not?</p><p></p><p>I believe the reason it's generally done, is some other regulation (NOT BS7671) makes reference to the need for a local isolator next to a "motor".and that regulation has been applied to extract fans. Now while it makes sense to have an isolator next to a big air conditioning fan that's operated remotely, so the person changing the drive belt can be sure it won't start while he is doing so, I remain to be convinced that the same is really needed for a tiny domestic bathroom fan.</p><p></p><p>My last point on the subject, In rental properties I strongly advice against having a fan isolator, as it is well proven that tenants will turn the fan off because the noise annoys them, and then complain to the landlord about the damp and mould in the bathroom.</p></blockquote><p></p>
[QUOTE="ProDave, post: 411760, member: 6969"] The question appears to be why fit a fan isolator switch? The answer is not simple. Now, for a timer fan, that runs on for some time after it is turned off, it does make a great deal of sense, but for a fan that just comes on and off with the light with no over run, I am not sure. If "replacement" is the reason given, then by the same argument, every light fitting that is wired "loop at the light" should also have an isolator switch next to it so you can replace the light fitting should it not? I believe the reason it's generally done, is some other regulation (NOT BS7671) makes reference to the need for a local isolator next to a "motor".and that regulation has been applied to extract fans. Now while it makes sense to have an isolator next to a big air conditioning fan that's operated remotely, so the person changing the drive belt can be sure it won't start while he is doing so, I remain to be convinced that the same is really needed for a tiny domestic bathroom fan. My last point on the subject, In rental properties I strongly advice against having a fan isolator, as it is well proven that tenants will turn the fan off because the noise annoys them, and then complain to the landlord about the damp and mould in the bathroom. [/QUOTE]
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Shower fan isolation switch
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