Mirror demisting mat

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9 Feb 2009
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Hampshire
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United Kingdom
Can people advise me on the following?

I am looking to put a demisting mirror mat in my ensuite when I put a new mirror up.

Can people advise on any particularly good makes or those to steer clear of?

The one I was looking at is the Devi one, but its now the wrong width, however they now do a more standard adhesive foil mat which I can use.

I presume these are fine to put on a bathroom typ mirror (which has a foil backing)?

It seems they just wire direct to the lighting circuit - is this also correct? I was thinking of wiring it to the fan circuit so it only comes on when likelihood of shower is running. The fan is controlled via a fan isolation switch.

And finally - do I really need to inform the local building control or whatever due to part P regs? Just for this? It will increase the cost immensely!
 
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You need a 30mA RCD on the circuit feeding the demister, you could run it off the fan circuit (convenient, as the fan should be running when condensation generating activities are happening!). :LOL: :LOL: :LOL:
 
Can people advise me on the following?

I am looking to put a demisting mirror mat in my ensuite when I put a new mirror up.

Can people advise on any particularly good makes or those to steer clear of?

The one I was looking at is the Devi one, but its now the wrong width, however they now do a more standard adhesive foil mat which I can use.

I presume these are fine to put on a bathroom typ mirror (which has a foil backing)?

It seems they just wire direct to the lighting circuit - is this also correct? I was thinking of wiring it to the fan circuit so it only comes on when likelihood of shower is running. The fan is controlled via a fan isolation switch.

And finally - do I really need to inform the local building control or whatever due to part P regs? Just for this? It will increase the cost immensely!
Sorry yes in England and Wales it will come under Part P. And as already pointed out changes in BS7671:2008 mean that all bathroom electrical items need RCD protection so it is likely to become a costly job. Try some soap on mirror it's a lot cheaper!
 

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