Burglary protection - Upgrade windows from WK2 to WK3 - Alarm system?

Well, then you can never, never, never open it. I don't know if you want to make such final decisions. The savings will be small, right?

I was more concerned about the appearance than the savings. Without a handle, it just looks better to me.

Not just the handle. With us, there are two large-area window elements that could not have been manufactured as a single unit to open in the form ([VSG, Schallschutzverglasung]), but only as two sashes.

Wednesday our new P4A glass finally arrived and the windows now have mushroom heads everywhere possible.

What is the small, black thing there? An alarm contact?

Yes, a reed... used for:

[*]Alarm system
[*]Opening of the roller shutters
[*]Indication of the window status (Open/Tilted/Closed) below is another

Interesting. I'm too stupid to understand what is possible. We also have contacts on everything that can be opened. Distinction is also possible, meaning the display of the window's status (Open/Tilted/Closed), and that can then be connected to an alarm system. I didn't know that it could be combined with roller shutters.