Bathroom Extractor Fans

[westie101]

I was talking to a friend last night who owns a cottage in East Anglia that she rents out. At the moment she's having some issues with her tenant.

This has involved the local council who has issued some improvement notices.
One of these requires the fitting of a "humidity controlled" fan in the bathroom

My question is: -

Is there a requirement in any legislation or advice/guidelines that a bathroom fan must be humidity controlled or is a timed run-down fan equally acceptable?

Whilst I understand modern design would specify a fan, is any legislation etc. retrospective if no other work is being done in the room?

 

[PrenticeBoyofDerry]

If the room has external window, there is no requirement for either standard, timed or humidity fans.
If no external window a timed ex-fan will do, there is no law/requirement that I am aware of that states a humidistat must be installed.

 

[Chri5]

Maybe it's not a legal requirement, but there could be another element.

Say the improvement notice has been served to sort out damp or condensation, then a requirement for venting with humistat seems entirely resonable.

 

[ericmark]

I think all down to Part F building regulations and from memory a pneumatic push switch is all that is required.

Windows do make a difference as said if it opens no fan required.

If window but does not open there must be alternative as well as lights to turn on fan so can be turned on with out lights.

If no window then lights alone can switch fan.

You don't have to use lights to switch fan.

Also Part L1B and Part J do have a bearing. L1B it would seem is trying to get you to fit heat recovery units and J is where you have open flues. The open flue means really anything which does not use a balanced flue so the worry is that if you blow air out of the house that fumes may be drawn into the house so in theory since my living room has a gas fire for emergency use I should not use a tumble drier venting to outside. Yes I and I am really going to fit a heat recovery unit as a result!

However I point out this as to argue with local authority they may get there own back and ask for even more.

 

[PrenticeBoyofDerry]

Also another point to look at is, when the property has built or when this room was made in to a bathroom?