On 31/08/16 12:53, Adam Funk wrote:
Based on previous discussions here, I finally got around to having the
extractor fan set up in the bathroom.

* S&P 250 m3/h quiet fan mounted above the ceiling
* humidistat + timer control on the wall close to the ceiling
* flexible ducting from a grate close to the centre of the ceiling to
the fan, & from the fan to the grate in the outside end wall (above
the ceiling)

The fan is audible, but by no means noisy. I am amazed by how
effectively it removes condensation in the bathroom (I was going to
try this & then consider an illicit dehumidifier arrangement) ---
within 24 hours of firing it up, even with showers in that time, all
the condensation cleared off the ceramic toilet tank, & it has stayed
clear.

The window is still locked "vented" (about 10 mm open) for the summer,
so the fan is mostly replacing bathroom air with outside air. Can I
expect such good results during the winter too, when it's sucking
"indoor" air under the door?

(It's a small bathroom with a radiator. The door has a spring-closer.
The ceiling is now insulated.)


I have an S+P duct fan and I am impressed how fast it can clear the
malodorous vapours from a curry

Mines a bit noisy but that is vent wind noise (I should have used a
"mushroom" vent, not a grille.

Now it's working at last, I am very impressed with the Manrose
timer/humidistat I put in. It even has an external contacts input which
I fitted a momentary pullcord[1] to so you can force the fan to run for
a time.

Does not come on until really needed (I set to around 60% RHD) -
typically in summer a steaming bath with the door closed will start it
going as will movement with water like washing hair.

Might need tweaking in winter when it's colder, but so far it does not
seem to suffer from false triggering.