Bathroom Extractor duct length

[mightynerd]

Hi All,

Recently moved to a neglected house, so this is the first of many (many, many) posts!

The En Suite is about 18 months old, and incredibly doesn't have *any* extraction, leading to all the sorts of issues you'd imagine..

I am looking to fit an inline extractor, near to the shower cubicle, but the issue is that where the shower is located is a good few meters from any logical place to place outlet vent/grille.. Worse still, the nearest soffit/facia is over a single story glass roof extension, so its not going to be straight forward to get a ladder there.

So the real questions are :

- Any recommendations where to put the intake grille? Directly over the shower cubicle?
- Recommended maximum duct length seems to be 1.5m. If I used rigid ducting (soil pipe?) rather than the flexi stuff, how much more could I get away with?
- If i went with a Radial extractor fan, and rigid ducting, how far could i route the ducting without seeing too much performance drop off?

Thanks in advance!

 

[MarineBob]

I have the intake in my shower directly in the shower stall. Been there for 30+ years with a couple of changes and no issues. Works fine. I can't speak to the run length although I recall seeing booster fans if you got to go a long way. One suggestion if you care about loudness. I replaced the fan a year or so ago with a remodel and after looking at all the brands, aside from anything exotic, Panasonic fans were the quietest for any given price range. At least that was my experience

 

[mightynerd]

Thanks Bob!I was assuming over the shower would be fine, but just wanted to check I wasn't missing anything...
Good idea about a second fan... fit one, see how it goes, fit a second if needed!
Cheers,
Chris

 

[oliviya]

The diameter of the duct, and whether it's flexible or hard, the length of duct can be used (smooth inner surface). This is how a typical ducted fan works: It can move about 6 metre of ducting.