I have a damp cellar with some ventilation (air bricks to the outside)
but not enough, so I'm planning to mount an extractor fan in one of
the air brick recesses, then run it as much of the time as necessary
(controlled by a timer) to dry out the cellar.

I'll probably run it mainly at night in case the noise is annoying in
the living room.

Does anyone have any "experimental results" with something like this?
Any tips or suggestions?

Will an extractor fan wear out quickly if it's run for a long period
every night?