ᐅ New Construction: Choose a Ventilation System or Integrated Window Ventilation?

1. Are ventilation systems or integrated window ventilation required according to current new building standards?

2. Or is regularly opening the windows several times a day sufficient for ventilation?

3. For integrated window ventilation, there are passive and active systems—what is recommended?

Is there a similar thread on the first page?!

I can't find it immediately right now....

That's why Zaba linked him, right?!