Hi everyone I have just re-installed my in-line extractor (the type with a down light in the centre of the ceiling cowell). Anyway I have now got the timer working (previous owner connected the lives the wrong way round). I have mounted the fan on the wall in the loft so it pushes the air upwards I take it this is O.K. as I always see them installed on a joist moving the air sideways if you see what I mean, and B&Q now have the kits in visi packs so you can't get to the instructions anymore. Also it seems to make a faint booming sound which we didn't notice before but now it stays on you can hear it at night when in bed. The boom is similar to the noise of a car stereo where you can hear the Bass of a song but nothing else and it gets a bit annoying sometimes. Mind you if I drink a few Stellas or Kronies I go to sleep instantly but my wife doesn't see this as a long term solution!

Alec wrote:
Hi everyone I have just re-installed my in-line extractor (the type with
a down light in the centre of the ceiling cowell). Anyway I have now got
the timer working (previous owner connected the lives the wrong way
round). I have mounted the fan on the wall in the loft so it pushes the
air upwards I take it this is O.K. as I always see them installed on a
joist moving the air sideways if you see what I mean, and B&Q now have
the kits in visi packs so you can't get to the instructions anymore.
Also it seems to make a faint booming sound which we didn't notice
before but now it stays on you can hear it at night when in bed. The
boom is similar to the noise of a car stereo where you can hear the
Bass of a song but nothing else and it gets a bit annoying sometimes.
Mind you if I drink a few Stellas or Kronies I go to sleep instantly
but my wife doesn't see this as a long term solution!



One like this, with an in-line fan, right?:
http://www.screwfix.com/app/sfd/cat/...15061&ts=68331

Can't see how the orientation of the fan would make any difference. Can
you tell if the noise is coming down the vent, or through the ceiling?
If the former, maybe an inline damper (www.bes.ltd.uk) would help (or
shut the bathroom door! :-) ); if the latter, maybe more ceiling insulation?

But either way, the first thing I'd try is mounting the motor on
something with a bit of 'give' to dampen any vibration: mine is attached
to a roof purlin, but with large rubber washers between the timber and
fan. Helps a lot.

David