extractor fans a must?

[sima24]

Hi can someone please clear up for me wheather extractor fans are a must on domestic rewires. Some people say you dont have to but some say you do. I always fit them as standard but current builder dosnt want them. Thanks.

 

[telectrix]

if the builder and the customer don't want them , don't fit them. if building control are involved, they might well insist on them so then you fit them. same with smoke detectors. i always include them in my price, but at the end of the day, you have to go with what the client wants, as long as what you do complies.

 

[sima24]

Thanks, if building control insisted upon them would they have to pin it to a reg?

 

[Adam W]

You need them in rooms with insufficient natural light. I think there's a table in the guide to the building regs.

 

[MDJ]

It is all explained in document F ventilation or section 1 document 1990 something.

 

[telectrix]

You need them in rooms with insufficient natural light. I think there's a table in the guide to the building regs.

what have fans got to do with light?

 

[smuggler]

Fans are building control requirement but are not need if other ventailation system such as drimaster

 

[Adam W]

what have fans got to do with light?

Rooms with insufficient natural light require forced ventilation, ie fans.

 

[shocking_eg]

i thought all kitchens, bathrooms and utility rooms needed some sort of extract ??

usually in the kitchen you wont need one as the extractor hood for the oven does the job...

 

[telectrix]

Rooms with insufficient natural light require forced ventilation, ie fans.

no... rooms with insufficient ventilation require fans.

 

[Adam W]

"For purge ventilation, the overall area of any windows and external door in a habitable room (a room other than a wet room) should be at least 1/20 of the floor area of the room.
If a window opens less than 30 degrees and there are no external doors, it's area should be 1/10 of the floor area. If the habitable room has no external walls, purge ventilation can be provided through an adjacent room or conservatory."

Table 10.5 gives extract ventilation rates.

 

[i=p/u]

If no window, need them to take stink out 23l per minute minimum or 15l per min and standard fans are all nearly double

 

[JulianC]

The requirements for extractors are covered by Part F of the building regs, which sets out the ventilation requirements for new builds, extensions, changes of use etc. As far as existing dwellings go, section 7.23 of approved doc. F states that when carrying out any 'building work' in an existing kitchen/bathroom, an existing extraction system should be retained or replaced. However if there is no existing ventilation system you need not provide one.

If you do decide to provide one, an extractor fan is probably the simplest method and it should comply with the ventilation rates and other requirements specified in Part F.

 

[telectrix]

Exactly. Rewires and new builds are 2 different kettles of fish.

 

[Geordie Spark]

what have fans got to do with light?

Have you never heard of a fan light?





(It's like a headlamp for gynecologists I believe)