wrote in message
ups.com...
chris French wrote:
In message . com,
.....
not my experience at all. Had a 100mm inline van in the loft, venting
the bathroom through the roof. operated by a humidistat. It worked very
well, much better than the previous arrangement - a window. Never any
problems with damp, mould etc.

I wonder why. My 6 inch one was useless.

Quite probably due to an inadequate supply of air into the room. My
humidistat operated fan works fine, but I ought to get around to fitting a
door on the bathroom some time.

Colin Bignell