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Първоначално написано от Гадьо

А на снимката 365 ppm CO2, да не си го сложил в оранжерия, защото фоновото ниво е около 390-400 ppm?

What are safe levels of CO and CO2 in rooms?

CO2
250-400ppm	Normal background concentration in outdoor ambient air
400-1,000ppm	Concentrations typical of occupied indoor spaces 
with good air exchange
1,000-2,000ppm	Complaints of drowsiness and poor air.
2,000-5,000 ppm	Headaches, sleepiness and stagnant, stale, stuffy air.
Poor concentration, loss of attention, 
increased heart rate and slight nausea may also be present.
5,000	Workplace exposure limit (as 8-hour TWA) in most jurisdictions.
>40,000 ppm	Exposure may lead to serious oxygen deprivation
 resulting in permanent brain damage, coma, even death.
CO
9 ppm	CO Max prolonged exposure (ASHRAE standard)
35 ppm	CO Max exposure for 8 hour work day (OSHA)
800 ppm	CO Death within 2 to 3 hours
12,800 ppm	CO Death within 1 to 3 minutes

Не живея в панелка с пушачи