Drop on flat channel ducting for toilet/shower?

[derekwinton]

Hi,

I bought an old (lower) victorian flat which has a toilet bang in the middle... with no venting. I can't move it as the soil vent is also bang in the middle. I got a building warrant to cover various bits and pieces and included in that was running a vent through the bedroom and to the outside wall.

Obviously I'd like to make that as inobtrusive as possible so was looking at flat channel ducting:

http://www.screwfix.com/p/manrose-rectangular-flat-channel-1000mm/14118

Wondering though if there are regs relating to drop towards the outside to stop condensation running back towards the fan?

Thanks

 

[pred]

Can you not run the ducting, wether it be rigid or flexable between the floors? preferably between joist to an exteral wall.

 

[pred]

Also where does this condensation come from? i've seen cow pats steaming but never ordinary turds.

 

[derekwinton]

Yes sorry omitted to mention shower going in too. Above ceiling is a good idea. Vent will run parallel to joists so should work. Any thoughts on incline?

 

[pred]

I'm in the process of fitting a new fan with the light combined in the centre of the extractor grill, in the past condensation has not been an issue, i would recomend the model with the combined light.

http://www.screwfix.com/p/manrose-s...anrose Shower Light & Extractor Fan Kit 100mm

I got mine from a local electrical shop under £40