Edit: Context behind this question is because my parents always tell me to shut the windows all the way and I kinda feel like I’m suffocating… literally… (it’s Winter here)
Like I just struggle to breathe with windows closed…
So I’m just curious, how do y’all not suffocate while trying to keep house warm and spend less on heating?


Ah, then no forced air through ventilation ducts to move air around.
My current house doesn’t have vents either, but I have fans that move air around the important bits that get occupied the most. With my dogs needing to go out, and work, the doors are open enough, and there’s enough leakage to not worry about co2 levels. Except my wife sometimes trips the sensor in the hallway when she takes a long bath while burning multiple candles…