4 ms·

The amount of O2 removed from the air is negligible compared to the impact of elevated CO2 on human gas exchange tbh. I doubt you'd have much benefit going dow

The amount of O2 removed from the air is negligible compared to the impact of elevated CO2 on human gas exchange tbh. I doubt you'd have much benefit going down to 300 instead of 400, and it introduces a whole other problem - aiming at sub-ambient CO2 targets makes ventilation increase the amount of scrubbing you need to do instead of decreasing it. I imagine the increase in cost would be massive. But yeah it'd probably be better to base the calculations on co2 breathed out by people. But like I said, that's just some quick, likely incorrect math to land in the right ballpark.

OutOfHere 2y ago
Thinking ahead, as the atmospheric outdoor level keeps climbing, ventilation will become insufficient to achieve a desired target indoor level. Air conditioning suffers from the extreme version of the same problem. Yes, the cost is substantial if using Soda Lime. Amines are traditionally used instead in a closed loop system, but they are corrosive and unsafe for use at home, although refrigerators and ACs too make use of similar loops. GPT says that some non-corrosive common amino acid salts can be used instead, but I find it difficult to believe.