We have a flat with a toilet (pretty much literally a WC - just a room
with toilet and small handbasin - a little less than 2.5m3) bang in
the middle of the building (it's a "colony upper" in Edinburgh for
those familiar with them). That means that it is, give or take, 5-6m
from the outside in any direction. The path that we are proposing for
the extractor ducting involves going upwards from the (false) ceiling
for about a metre into a shared loft space, then around 5m
horizontally to a vent in the roof (already installed). Was planning
to have an axial fan in line at the outside vent end - axial because
the loft space there is right next to our neighbour's bedroom and I
thought a centrifugal fan might be too noisy.
- I was planning on using 4" circular section ducting for the 1m rise,
then the box-section ducting for the horizontal run. Any problems with
- There are a couple of oblique angles - what is the best way to
- We may have to navigate the ducting round some very old piping.
Obviously, we'll try to minimise curvature, but is there an
alternative to the bellows-type ducting for this?
- Am I being hopelessly optimistic in using a 4" axial fan to drive
Any other advice or experience will be gratefully received!
Thanks - Adam...
- posted 12 years ago