Loud Extractor Fan

Postby bluenun » Fri Jan 06, 2012 7:24 pm

I have moved into a new home on the top floor.

In the Kitchen there is an extractor fan, normally there is no noise when it is turned off but when the wind blows it makes a loud noise of the wind whistling down the metal tubing.

Now I am sure it is silly and maybe dangerous to cover the outlet completely on the roof, but is there anything I can do to reduce the noise?

I have not been up on the roof but assume there is some kind of cowling on there already?
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