the_constructor wrote:
Just out of curiosity, are 12V timer fans noisier than 240V fans....?

I got a 12V fan and my neighbour nearly jumps out of her skin when it is
switched on.

I installed it correctly a few months ago but after a week I disconnected
it.

It must be bad though because I can hear it downstairs through 3 closed
doors.

The fan is from Screwfix....

James


12v fans are exactly the ones fitted in PCs. If you want quiet, look at
someone like quietpc.com and find a low noise case fan. Make sure it
isn't speed regulated though, you want a 2-wire one, and replace the one
in the unit.

A word of caution - some quiet fans are quiet just because they don't
push much air. And the one in the unit you've bought may be a high
power centrifugal unit, much better at pushing air through a duct
against an incoming wind!

I've had a case fan in a vent unit for the last 15 years or so. It's
getting a bit tired now!

Andy