I wonder if anyone can help?
I've got a bathroom and en-suite shower on the top floor. The original
extractor fans go through the ceiling and duct out into the loft and through
a ridge tile. The old ducting system was ripped out years ago during a
renovation and now I have the task of replacing it.
I'm looking at placing a standard fan in each room (with timer/humidistat)
with the ducting from each fan terminating into the one ducting which then
goes out the ridge tile roof.

My concerns are with the positioning of the ducting and the chances/problems
of condensation dripping back down the ducting and through the fan. Another
concern is extracting from one room into the other room rather than through
the roof - do I need to install a valve or something?

Any advice and also any links to schematics on installing extraction systems
appreciated.

On Fri, 23 Jul 2004 19:11:34 +0100, "D" P.doody@monkeynuts strung
together this:

Any advice and also any links to schematics on installing extraction systems
appreciated.

I can't be arsed to write it all out again so I've cut & pasted most
of my reply from a recent post, (which you would have found using
google).

1. You'll also need two back draft\one way valve affairs otherwise
when you switch on fan A the ****ty air will be pushed into the room
that is serviced by fan B.

2. What sort of ducting are you using? If it's normall soil pipe then
a normal T. Other common methods of sourcing parts you require for
ducting include aimlessly wandering round diy stores and builders
merchants until something is spotted that can be made to do the job
with liberal amounts of duct tape applied!

3. http://www.domusventilation.com/et100.html download the pdf, look
on page 27, tees and backdraft dampers are on there. Now just wander
into a local electrical wholesaler and ask if they can get domus, also
ask for the equivalent parts in whatever brand they can manage,
probably be cheaper if its from a more usual supplier.

4. You can also order online here.
http://www.tlc-direct.co.uk/Main_Ind...d_1/index.html

5. Remember, you can do anything with a roll of duct tape.

6. The condensation is usually taken care of by installling a loop at
the low point of the ducting below the vertical section to the ridge
and either leaving it to collect and evaporate or you can buy
condensation traps which you can attach drain hoses\pipes to.
--

SJW
A.C.S. Ltd