Building Regs Part F

[avinalarf]

Hello all

I'm very sure that I found some sort of calculation to decipher whether or not a bathroom extractor is necessary when doing a refurb but I can't find it now headbang . It's something like calculating volume of room and size of window, but I can't remember what happens next:Blushing

Can anyone enlighten me?

Many thanks.

 

[Zeespark]

TLC have a guide for it I think Nat.

Andy

 

[sparkytim]

Calculation only required to find out what SIZE fan is required.

Building regs Part F and L will tell you WHEN fan IS required.

 

[avinalarf]

Thanks chaps. Elecsa guy has just said that if there's an opening window, then no fan required! Fairly straightforward...