In message , Andy Wade
writes
Martin Pentreath wrote:

to control the extractor fan in my bathroom. The idea is to put the
thermostat on the hot pipe going to the shower so that when the shower
is turned on it triggers the fan.

Why not use a humidistat, which would have the advantage of activating
the fan whatever the source of moisture - bath, shower or basin?


Yep, I used basic Manrose humidistat in our bathroom. It works well on
the whole. Occasionally it comes on in response to general high humidity
outside, but normally works well.
--
Chris French, Leeds