Downstairs WC fan vent

[DIYspanner]

There was a fan fitted in the ceiling but its noisy so I got a new one.

The issue I have is that there's no ducting in the ceiling for the fan so its been venting into a small volume of ceiling void. The WC has an opening window but I'm not keen on having the window open during the winter.

There's a vent duct that runs from the kitchen hob, through the garage attic to the external wall. Is it permissible to route a vent pipe from the WC into the garage and pipe into the hob's duct?

 

[Madrab]

Permissible, never heard anything saying it can't be done. Preferred, maybe not, there could be the potential of smelling the kitchen extracts in the bathroom.

 

[Murdochcat]

I wouldn’t do that. The smells from the kitchen will end up in the cloak room and worse vice versa

Add another duct through the garage is the best idea

 

[ianmcd]

as others have said you will get cross contamination of the two air spaces, either run a new duct or a flexi hose