Daughter has a "passive" 5 inch duct from bathroom ceiling to roof.
This is not proving sufficient with her power shower.
I plan to insert an in-line fan (e.g. Manrose MF125T) in the ducting:-
The installation instructions state:-
"INSTALLATION INSTRUCTIONS FOR MF FAN MODELS
This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?