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?


I got a Technoline WL1030 meter for my room and whenever it reaches 1500 ppm CO2 I open the window until its back down below about 600-700, then I close it to not waste more heat than necessary