Bathroom fan: do UK regs require connecting via lighting circuit?

[Dustydazzler]

Most times I connect the fan with the light , but with a lot of posh bathrooms / en-suites I am doing they have dimmers and multiple switching for sets of lights.
So I then lean toward a hard wired fan with either a built in PIR or built in humidistat

 

[DPG]

Most times I connect the fan with the light , but with a lot of posh bathrooms / en-suites I am doing they have dimmers and multiple switching for sets of lights.
So I then lean toward a hard wired fan with either a built in PIR or built in humidistat

Trouble with the PIR method is the fan will kick in every time someone goes for a wee. Wasteful, and also unnecessary wear and tear on the fan.

 

[Dustydazzler]

Trouble with the PIR method is the fan will kick in every time someone goes for a wee. Wasteful, and also unnecessary wear and tear on the fan.

I agree but I offer both options and seem people want the PIR option, they pay the money they make the choice.

Also in reality a PIR fan is only like £90 so if it needs replacing in 5 years its nothing really when you think the about it

 

[DPG]

I agree but I offer both options and seem people want the PIR option, they pay the money they make the choice.

Also in reality a PIR fan is only like £90 so if it needs replacing in 5 years its nothing really when you think the about it

Yeah I'm probably being picky. It's just one of the things that bugs me bathroom fans.

 

[Dustydazzler]

Yeah I'm probably being picky. It's just one of the things that bugs me bathroom fans.

I don't have one in my bathroom , I just open the window

 

[Electro-tech]

As far as I know, it always has, but of course Document F changes over time.
Current regs, for a refurb of an existing bathroom, are that if there was no fan before, then there's no obligation to fit one. If there was one there before, it needs to be retained or replaced by one at least as effective.

So are we expected to fit a fan & test the flow rate & notify the LBC with a cert or is this for larger ventilation systems.
The regs are getting that mad that they have brought out Document O for overheating .

 

[brianmoooore]

Most times I connect the fan with the light , but with a lot of posh bathrooms / en-suites I am doing they have dimmers and multiple switching for sets of lights.
So I then lean toward a hard wired fan with either a built in PIR or built in humidistat

It's a long time since I wired a bath/shower room with just one light, so I either wire the fan with one set of lights (they can just switch on the other set if they don't want the fan) or wire the fan on its own switch with a neon.

 

[LastManOnline]

I don't have one in my bathroom , I just open the window

A far more effective option.Up until relatively recently most standard 4" fans were very poor value for money

 

[telectrix]

I don't have one in my bathroom , I just open the window

common sense beats technology every time.

 

[brianmoooore]

common sense beats technology every time.

Until the technology advances to the point when an open window flows air in one direction only, I'll stick with an extractor fan for at least six months of the year.