How long for extractor fan timer?

[ericmark]

You remember wrongly then.

There is nothing in the Building Regulations about fans.

So it is another thing that the Planning Portal approved documents say, but not actually part of the regulations, what is the point of the approved documents if they are wrong?

 

[Taylortwocities]

You remember wrongly then.

There is nothing in the Building Regulations about fans.

Well…there is an awful lot on BR Part F.
The fan bit is all over the place. In particular to this, Part F basically says

For toilets only, ‘purge ventilation’ (an opening window/door on an external wall) meeting the requirements specified in Appendix 2 of ‘Approved Document F - Ventilation’ can instead be used to provide ventilation if security is not an issue. If this is not available then purge ventilation by one of the approved methods (a fan) is necessary.

 

[Taylortwocities]

… duplicate

 

[ericmark]

If you have a modern fan with a ball-bearing motor and rubber mounts, that is practically inaudible, I would leave it running long enough to clear a steamy bathroom on a cold frosty night.

I note this is basic what the planning portal approved documents say, seems to make a big thing about noise of fans, and suggests heat recovery units.

 

[EFLImpudence]

That's it.
Edit - there are some bits about notices as well.


From The Planning Portal, if the same as mentioned by Eric:

and The Approved Document F (and all the others),
only the parts in shaded green are the actual Regulations:

 

[EFLImpudence]

Also from the Approved Document:

 

[JohnD]

...seems to make a big thing about noise of fans,....

and suggests heat recovery units.

horrible old fans (IME, especially Manrose) can be annoyingly loud.

But good modern fans can be very quiet, and inaudible when the bathroom door is closed, or hidden when a tap or shower running.

Some people have an aversion to fans, possibly because they have suffered a noisy one in the past.

I've used a heat recovery unit, and because it blows air in/air out, it does not create suction in the room. This means steam and odours can diffuse throughout the house, so I found it unsuitable for a kitchen or bathroom.

 

[ericmark]

This is the bit I read.

 

[EFLImpudence]

From where?

 

[JohnW2]

From where?

That's (page 24 of, in the version I have) Approved Doc F again ... so, as you've said, guidelines.

Kind Regards, John