It's still miles ahead of having literal holes in your window frames to let "fresh air" come in when it's -20c outside.

All you need to do is design a house with a sensible ventilation system, which costs virtually nothing compared to the rest of the building costs. It's even more stupid for americans because they already all have complex ventilation system...

>It's even more stupid for americans because they already all have complex ventilation system

Maybe for newer houses. I have an older house and I don't have a ventilation system. Forced radiator hot water heat and no AC in New England.