Easily 750 ppm indoors at the end of an 8 hour workday. I've measured it.
Easily 750 ppm indoors at the end of an 8 hour workday. I've measured it.
Engineer or HVAC tech?
Engineer or HVAC tech?
There’s little danger to humans of too much CO2 in the air they breathe. Even the Environmental Protection Agency says 1000 ppm is the safe limit for lifetime human exposure. Space shuttle CO2 alarms are set at 5,000 ppm, and the alarm in nuclear subs is set at 8,000 ppm. Today it's about 400 ppm.
(wattsupwiththat.com)
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