wrote in message
oups.com...
Gaffar wrote:
Hi, hoping this has probably been done many times and someone will have
a quick answer

I am just finishing off an extension which has left me with a
bathroom in the middle of the house with no external walls, so no
windows.

Can anyone suggest an extractor fan that would be suitable and upto the
job
of keeping the bathroom relatively dry from the steam.

Extractor will be vented through the roof

any tangential fan designed to be used with ducting. See screwfix or
toolstation .com
4" will give you garbage flow rate, 6" has real use.

TLC also do a 5" wall mounted one - installed two of those in the past. The
one in our shower room works like a dream - never a trace of any steam in
the room (timer set to 10 minutes or so).