Cleaning of ventilation ducts in ventilation systems

Where is a screw supposed to come from? Everything here is embedded in concrete.

Besides, a ventilation system is not high-tech. As if the screw had any significant impact. We are talking about a pierced plastic pipe through which air flows.

Where does a screw come from here? Everything here is embedded in concrete.

Between the upper floor and the attic we have a wooden ceiling.


For me, the question is how to find the screw?

Apart from that, a ventilation system is not high-tech. As if the screw had any significant impact. We're talking about a pierced plastic pipe through which air flows.

I suspect my developer will say the same. However, if I decide to have it cleaned after ? years, will the cleaning tools even get through? At the moment I can still try to have everything done under warranty.

In my opinion, the screw does not belong here and must be removed!

Then we can look forward to the feedback from the developer ...

I will report it.

A screw in the ventilation pipe is a natural element and indispensable in spiral seam pipes. So don’t worry. The screw neither interferes with the system’s function nor with later cleaning.

Unfortunately, I was not able to reach my builder today. Hopefully, it will work out tomorrow.

A screw in the ventilation pipe is a natural element and indispensable in spiral seam pipes. So don't worry. The screw neither interferes with the function of the system nor with later cleaning.

Thank you Mycraft for the support. The screw was not included in the price. I have nothing against screws if my builder shows how to clean the pipe.