Extractor fan for Bathroom

GT60

Hi 
Please can someone suggest / recommend an extractor fan for the bathroom to help get rid of the steam / condensation when having a shower?
I have the widow open but still have condensation.
Thanks 

Browntoa

Depends on where it could be fitted 

Is there access to an outside wall or a loft above ? 

No fan will remove condensation 100% 

GT60

Hi I have a normal extractor fan above the bath and shower and vented outside through the wall 
something like this but without the timer
https://www.screwfix.com/p/manrose-mg100t-12w-bathroom-extractor-fan-with-timer-white-240v/62530 

Doozergirl

Buy one that is humidity sensing, not one purely on a timer.  It will run until it deems the room dry enough.  

Le_Kirk

I have used Xpelair Premier CF20T and they do as @Doozergirl suggested, run until the air is dry (that is settable but you have to gain access to the PCB to adjust it).  Best fitted to a duct that exits through the roof or through a wall.  Installation manual here: -
https://www.xpelair.co.uk/sites/default/files/assets//Xpelair_CF20_instructionmanual.pdf
You will need a separate electrical feed (i.e. 2) if you want it to come on with the light and overrun with the humidity.

GT60

Hi thanks for that.
My current cheapo  extractor fan comes on when the bathroom lights are turned on and is vented outside.
I presume the Xpelair Premier CF20T I can just do the same with and use the original mains wiring that goes to the existing fan or would I need a separate switch?
Thanks

Emmia

Doozergirl said:

Buy one that is humidity sensing, not one purely on a timer.  It will run until it deems the room dry enough.  

I strongly recommend one with a humidstat - we replaced the externally venting fans in both bathrooms about 9 months ago and the difference in terms of the reduction in the humidity and damp is astonishing.  

Jonesya

This is a 'how long is a piece of string' question - the fan you need will depend on the installation so whether it is going straight through a wall where an axial fan might be sufficient, or through ducting with a greater pressure drop where an inline or centrifugal fan is likely to be needed. It will also depend on where it is being installed and whether it needs to extra low voltage for safety (SELV).

A few people have suggested humidity controlled fans but one thing to consider is they can start automatically so think if that would be an issue - if it's near a bedroom and the noise would be an issue if it started up by itself. 

Emmia

Jonesya said:

This is a 'how long is a piece of string' question - the fan you need will depend on the installation so whether it is going straight through a wall where an axial fan might be sufficient, or through ducting with a greater pressure drop where an inline or centrifugal fan is likely to be needed. It will also depend on where it is being installed and whether it needs to extra low voltage for safety (SELV).

A few people have suggested humidity controlled fans but one thing to consider is they can start automatically so think if that would be an issue - if it's near a bedroom and the noise would be an issue if it started up by itself. 

The new fans we have are significantly quieter than the old (both vent axia, which made installation easier) but screwfix has decibel noise information in their site if it's a worry.

DevilDamo

Also, how about installing a higher rated fan as normal min. requirements for a Bathroom is 15l/sec?

Or, just have slightly cooler and shorter baths/showers

badmemory

Forget the extractor fan, noisy, causes massive draughts throughout your home, etc, etc.  Get a dehumidifier.  Bye bye condensation & bye bye mould.  If I had realised how great it was I would have bought one with a humidity cut off - as in get down to 40% & turn itself off.  When this one breaks that is what I will be getting.