In message , Jan Wysocki
writes
Aside from idly wondering what the 45dBA is referenced to, I'd be
pleased if anybody could point me at something that will shift a
cubic metre or more of air per minute without disturbing me. I do
have space for a larger fan.

Would it be possible to fit a ducted version? Where the fan and motor
are away from the vent and ducted with flexible hose? This can then be
fitted to maybe the gable end wall of the house. I have a couple of
these and there is literally just a low level whisper from it.

Similar to:-

http://www.diy.com/diy/jsp/bq/produc...723&entryFlag=
false&PRODID=177072&paintCatId=
--
Bill