But you don't understand! It's simply impossible to sleep in a room without an open window! Every German visitor has insisted on this. I was born in Germany

But you don't understand! It's simply impossible to sleep in a room without an open window! Every German visitor has insisted on this. I was born in Germany myself,and of course slept with the window open, that's just what one did. But have long ago come to the land of heating and air conditioning, sometimes both on the same day, and HEPA filtration, God forbid that dirty, unsanitary nature might make inroads in your germ-free sanctum. The irony is that the windows that Germans insist on leaving open at night put our crank casement things to shame. Double gasketed? No, triple gasketed! Guaranteed airtight to god-knows-how-many psi, and without even a center post. And open horizontally or tilt vertically depending on which way you turn the handle.