Window with parallel setting

Hello everyone,

we will start next week with our new building Kfw70 without controlled residential ventilation. Why without, better leave that to our decision! A window manufacturer told us about a window with a parallel setting. We were very enthusiastic about it at first. But we also wonder if those 6mm really bring the effect if the window is left like that all day, in other words, if there really is an air exchange!?

Maybe someone has already gained experience with this.

Best regards

Why without, better leave that to our decision!

A good start to receive many answers

Rhenish greetings

...and what is the point of the parallel connection?

To permanently let the warmed air out of the house, even when absent, so that the heating always has to run continuously?

asks Yvonne

No, according to the little commercial, only the bad air goes out, but the heat stays inside.

Parallel is probably the modern tip - meaning nonsense

I don't think smoking in spring, summer, or autumn is bad. As long as the heating is off, of course.