@TechConnectify you said something like "you can even adjust these so the swing speed is faster than the latch speed. although I don't think there's much reason to do it like that" and I'd here to tell you I love doors like that! Keep the draft out, but no noise when closing = perfection!

Also also i'm here to tell you I think about these often, but have never bothered to look up how they more, so i'm v thankful for you making this video!

And you described the vestibule acting like a sluice of sorts as a concept, but I've seen them! I think the hospital here has them as a compromise between accessibility and heating.