Bathroom Extractor Location & Advice

[LeadFarmer]

My bathroom has always suffered from mould on the ceiling. Im having a new suite fitted and, having stripped the old suite out, its about to get plastered. I'd like to install an extractor (toilet is in a separate room), but Ive received conflicting advice about its location and switch.

1) Ive been told to position it as close to the shower as possible, this being the source of the humidity. Ive also been told to position it at the furthest point from the source of fresh air, so the clean air moves across the room.

2) Ive been told to wire it to my light switch. But ive also been told not to, so the extractor doesnt come on unnecessarily whenever I enter the bathroom at night.

Ideally I would like it to have a circular vent and be fitted into the ceiling so it blends in with the circular spot lights.

Any suggestions please as to where to locate it, and how to have the switch?

Cheers

 

[EFLImpudence]

1) Ive been told to position it as close to the shower as possible, this being the source of the humidity

Not necessarily.

Ive also been told to position it at the furthest point from the source of fresh air, so the clean air moves across the room.

That is more important so that it draws out the water vapour and not just the fresh air.

2) Ive been told to wire it to my light switch. But ive also been told not to, so the extractor doesnt come on unnecessarily whenever I enter the bathroom at night.

That's up to you.

Ideally I would like it to have a circular vent and be fitted into the ceiling so it blends in with the circular spot lights.

There are circular ones - google.

Any suggestions please as to where to locate it,

Is there a window?
You need to position it so that the fresh air is drawn across and replaces the moist air.

and how to have the switch?

It depends what you want it to do and how you want it to operate..

 

[LeadFarmer]

Thanks for your answers.

Its an upstairs bathroom in a typical 1930's 3 bed house and is only about 6ft x 6ft. It does have an opening window, and the door is opposite the window. I guess in a room that small the extractors location isnt crucial?

So that I dont have to knock a hole in the wall i'd like to have the extractor in the ceiling, going into the loft above, and vented out through the soffits by the roof. But I'll have to measure the soffits as they are only narrow.

Would something like this be sufficient?

http://www.toolstation.com/shop/Ele...er+Fan+Light+Kit+with+Timer/d190/sd280/p69739

Or should I go for the larger size

http://www.toolstation.com/shop/Ele...er+Fan+Light+Kit+with+Timer/d190/sd280/p94527

 

[EFLImpudence]

The fan you linked will do but the ducting must be installed correctly.

However, a 30's semi with a window in the bathroom should not really have a condensation problem.

Are you sure there is not a more fundamental problem?

 

[LeadFarmer]

I think the problem is my wife finds it difficult reaching the window as its a top opener, so often the shower is on with the window closed. She does leave the door open afterwards though.

The style of extractor above comes in 2 sizes -

100mm
24L/s
41dBa

or

150mm
63L/s
40 dBa

Should I play safe and get the larger one?

 

[EFLImpudence]

Yes, just as well go with the larger.
It won't need to be on for as long.

Make sure you install the ducting so that there are no low points in order for any condensation in the duct to run back or preferably to the outside.
Also, insulating it is desirable.

It will all be in the instructions.

 

[LeadFarmer]

Thanks for you help