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I had a balcony closure double glazed 16mm. When I close a noise like a blowing occurs. This closure consists of 3 shutters. There is ventilation above this facility. How to remedy this noise that occurs at closing.

It is very difficult to determine the origin of this noise at a distance. Some friction noises may come from the sealing brushes on the retainers. The phenomenon you describe is very similar to a compression sound. Test the closure by opening another window in the room. If the phenomenon fades, it is a lack of venting of the room, so a problem of ventilation. Contact the company that has put this material to you and who will explain the source of this noise and if it is technically possible to remedy it.

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