Wrong product delivered initially, but changed over with no fuss.
The exhaust fan is very quite and efficient.
Mounted in the wall, as intended, it draws steam from the shower effortlessly.
The advantage of having the fan outside the shower cubicle area is that there is no draught, it draws the steam over the top of the screen and directly outside.
I've being a builder for over 45 years and tried to convince trades and clients not to mount the fan, wall or ceiling, inside the shower area.