5 ms·
Back-of-napkin calculation using really rough estimates: The average person exhales about 1kg of CO2 per day. That's 542L per day. Let's say you produce 20% of
by kijin 4y ago
Back-of-napkin calculation using really rough estimates:
The average person exhales about 1kg of CO2 per day. That's 542L per day. Let's say you produce 20% of your daily CO2 output during the night, since your metabolism is lower when you're asleep. That would be 108L per person per night, or 216L for two people.
The average American bedroom is around 120-130sqft, or 11-12 square meters. Assuming a height of 8 feet, the total volume of your bedroom is around 25-30KL. Pumping 216L of CO2 into a sealed room of that size will result in a CO2 concentration between 720 and 864ppm. That's not high enough to cause immediate medical problems, but it might have more subtle effects, especially if your bedroom is small or if your metabolism is higher.
- jvm___ 4y agoThanks. 720 and 864ppm is probably the lower limit for a completely empty room.
- ambicapter 4y agoIs your math assuming that there was 0 CO2 in the room at the beginning of the night?
- PeterisP 4y agoDo you account for base CO2 level? Air in an unpopulated beach will be something like 420 ppm; and in my city the outside air is something like 600 ppm, so an empty well-ventilated room is still 680-ish ppm - so if someone starts exhaling, then you'd have to add the 720-864ppm of extra CO2 to that.