Shower fan

[johnad]

Hi everyone
I'm just about to strip all the tiles in my bathroom so while I'm at it I need some advice on my extractor fan.
At the moment I have a small 4" one from a DIY shed but I still have a room full of steam after a shower and it's causing damp on the ceiling and the grouting is going black (fully tiled at the moment)
So what I am looking at doing is installing a more powerful fan in the same ducting if that's possible or maybe even using a kitchen fan as these have a far better extraction rate?
Has anyone any thoughts on this as I need something much better than I have now .
It's an old cottage so the walls are cold to the touch so therefore more condensation .
The fan is not over the bath/ shower
Any help please.

 

[PrenticeBoyofDerry]

Do you have some room dimensions and where in the room is fan positioned at the moment?
If the there is a window in the room, opening this will help, also wiping down surfaces after baths and showers will help prevent mould spores.
Also after re-tiling, as an added defence against spores, I would recommend using an anti-bacterial grout such as microflex.

 

[Taylortwocities]

Also, please remember that if you have a 10mm diameter hole for the fan, you'll need a hole or something that will let at least that amount of air into the room.
Otherwise the fan will be trying to make a vacuum.

If the door is tight fitting, shave a chunk off the bottom, or insert an air grill somewhere out of sight.

PS Cheapo bathroom fans are barely able to push air through a cavity wall, on a good day.

 

[johnad]

Thanks for your response
The room is about 8ft x 9ft x 8ft high I don't intend to re-tile the walls except for around the bath,
I have one window that is always open a little but the bathroom is on a corner of the building ( ground floor ) and the window opens onto a little recessed area of the garden so not much air flow ?
I have plenty of gap under the door also but I think the draft that I do get from the window just pushes the steam into the house rather than sucking it out hence the need for a fan to extract the steamy air out and as I'm not having tiles on all walls I need a more efficient fan ?
I will be fitting the fan on the opposite wall to the bath as the bath/shower itself is along the internal walls

 

[PrenticeBoyofDerry]

Best place for fan is opposite door entrance if possible.
You require a fan that can deal with about 5000 l/m