Carbon dioxide concentration level
400-450PPM (excellent) usual outdoor air level.
450-700PPM (Good) The typical value of living
space with good ventilation. 700-1000PPM
(Minor pollution) The living environment with poor
ventilation.
1000-2000PPM (middle level pollution)
insucient oxygen makes people sleepy and
the air that may cause complaint.
2000-5000PPM (serious pollution) The stagnant,
old and muggy air. The phenomenon of headache,
drowsiness with distraction, declination of
attention, tachycardia and slight nausea.
Above 5000PPM (serious pollution) may cause
serious anoxia or lead to perpetual cerebral injury,
coma or even death when exposing in air.
Above
5000 PPM
ENGLISH
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