I got a room on the 5th floor with a view to the b...

I got a room on the 5th floor with a view to the backyard. The exhaust air of a ventilation duct opens approximately at the same height. The fan causes a hell of a noise. Falling asleep is impossible. I complained to the front desk and was met completely uncomprehending.
These rooms are probably turned on foreign guests at the same price, which is expected to return anyway. Whoever experiences the same, can hereby prove that there were former fellow sufferers.
Good night!