T30 Fire Protection Door - Frame Dimensions

What is your experience in practice with the tightness like? Does the seal grind heavily on the floor, or how should I imagine it?

The seal only rests in the closed position, keyword retractable. Nothing rubs during operation.

That sounds very good :) what I would still be interested in now is the tightness...perhaps someone can tell me something about it?

Our door is tight. There is no draft and nothing drags. There were no problems with the Blower-Door-Test either. However, I have not made any pressure measurements or anything like that :rolleyes: