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The simple solution might be to use Greenwood Airvac fans the instructions for which state that provided the fan is supplied from a 5A lighting circuit no local fusing is required.
A member (?) who first brought this to my attention posted a letter/Email from Greenwood Technical Support that said "... 5A ..." was a legacy issue and that the current advice from GTS and to be incorporated in the new instructions would state "... 5A or 6A ...".
Sorry I can't find the thread or a copy of the letter/Email, I just hope this jogs someone's memory.

http://www.greenwood.co.uk/
 
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i find that an air brick is a simple solution . never seizes up, doesn't need an isolator, nor a fuse, low maintenance, low tech., and no part pee.
 
My understanding of the problem is that most cheap bathroom fans don't have thermal cut outs built into them, so the manufacturers cover themselves by requiring the lower fusing to be fitted. I don't know about a specific reg to cover this because as Markie says some manufacturers make fans that don't require fusing down. Vortice are one, Solar and Pallau are another.
 
Thats what I was advised to do by my inspector last year, fuse the whole bathroom down- it can all start looking a bit fussy in a nice posh newbuild with fcus & isolators. I did see a Greenwood fan once with its own internal fuse.
 
I thought under Part P a bathroom extractor fan installed in a bathroom without windows must have a triple pole isolator to isolate for maintenance without turning the light off?


Sent from my GT-I9100 using Tapatalk
 
I thought under Part P a bathroom extractor fan installed in a bathroom without windows must have a triple pole isolator to isolate for maintenance without turning the light off?
Sent from my GT-I9100 using Tapatalk

I think that is a myth, probably useful but in the same vein one could say that you must have a back up light to work on a light fitting, etc.
No mention of this in Part P or F.
 

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