eli5, If I shut all doors of a usual room in a house, how much oxygen enters and leaves the room?

Question

I just want to know if at all we suffocate unknowingly if there is no proper ventilation of rooms. Will the oxygen be restored from the tiny gaps of doors and windows?

In: Physics

Answer 1

Unless you live in an airtight chamber, the numerous holes, crevices, gaps etc around a typical house means the oxygen content would functionally not drop for a long long time. What **would** become dangerous is the buildup of carbon dioxide.