Advice on bathroom extractor fan


Postby cherryb » Fri May 23, 2008 12:14 pm

I'm looking to fit an extractor fan in my small bathroom. I'm hoping it can be ducted through the loft and down and out through the soffit. I'd like to fit it in the ceiling above the shower (it's not a shower cubicle, just an 'over bath' shower with a bath screen) and would like one that comes on when it gets humid, and stays on after I've left the bathroom, until the humidity has died down. I assume I need an 'inline' or shower fan, but I can't seem to find one that has the humidity function. Can anyone suggest a suitable fan? Many thanks
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Postby rosebery » Fri May 23, 2008 9:59 pm

Manrose, Expelair and Ventaxia make humidity controlled fans. Alternatively you could just fit one that is activated by the light switch and runs on for 20 minutes after the light is turned off. Alternatively use one of the latter but use a separate humidistat to operate it in place of the light.

Remember that a bathroom is a special location under Part P of the building regs when you are considering your electrics.

Cheers
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Postby Perry525 » Wed May 28, 2008 5:37 pm

Silavent make a low voltage extractor fan with timer and humidistat, it also has a heat exchanger to help save some of that heat.
Look for a fan that has an effective shutter that will keep out the cold.
Also note an open fan will loose an enormous amount of heat.
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Postby rosebery » Thu May 29, 2008 9:39 am

Perry

This may sound a dumb question but what do you mean by low voltage? Technically 240V is low voltage.

Cheers
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Postby Perry525 » Thu May 29, 2008 1:40 pm

In bathroom terms water and electricity at 230 volts will kill you, hence not low. On the other hand 12 volts plus water doesn't.
Strange how we look at the same thing, and see something different.
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Postby rosebery » Thu May 29, 2008 6:18 pm

"In bathroom terms water and electricity at 230 volts will kill you, hence not low. On the other hand 12 volts plus water doesn't."

Hmm - actually it's current that kills not volts. 230V is low voltage. You mean ELV for 12 volts methinks.

Cheers
rosebery
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