bathroom extractor fan advice

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Hi,

We're just about to have a new bathroom installed, someone else is doing the install (I'm not good with DIY!) but we're providing the parts. I'm after a humitity controlled extractor fan.

I used this fan size calculator http://www.tlc-direct.co.uk/Technical/Ventilation/Ventilation4.html

And as a result was lead to look at these two fans :-

http://www.tlc-direct.co.uk/Products/ADICON60.html

http://www.tlc-direct.co.uk/Products/BGWF150AH.html

Is there anything I need to know about these? I think it will be wall mounted (we basically have a hole in the wall with a vent cover thing that slides over it at the moment) but what do I need to buy apart from the fan & the humitity module so he can install it?

Thanks for any advice,
Steve.

edit - the bathroom is 1.7x2.1x2.4m and it's a bathroom with shower.
 
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I would avoid the humidity fan and go for a timed fan, you want the fan running whenever the room is occupied to avoid mold, the humidity fan will only run with high humidity.
 
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Oh - thanks for the reply - the timed fans are a lot cheaper so that kind of suits me - I thought the idea was that I only needed the fan on when it got humid so a humitity sensor seemed like the sensible way to go?

Why do I need the extractor fan on if I've just popped in to clean my teeth or something?

thanks - worto.
 
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Put the timed fan on a separate pull switch, and then you can decide if you need it on or not.....after a shower it should run for 15 mins or thereabouts after being switched off. John :)
 
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Mold spores can enter the room anytime so the more ventilation you have the better, my shower room has twin fans which are triggered by a movement sensor [pir] so run if you so much as look in the room, no mold at all despite there being no window in there.
 
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