Blowing air from a plastic window is a fairly common problem.
We tell you what to do if there is a draft from plastic windows.
The first thing you need to do is determine where exactly the wind is blowing.
Next, you should try to adjust the window using the eccentrics.
If the adjustment does not help, the problem is most likely in the sealing rubber.
Over time, they lose their elasticity, become rigid and no longer fit properly to the window frame.
In this case, the only option is to purchase a universal sealant for plastic windows.
It is inexpensive. You don't need to call a specialist for installation, anyone can do it.
For reference
A window is an opening in a wall that serves to allow light into a room and for ventilation.