Kidde KN-COPP-3 (900-0099) - Manual (Page 14)

Part Three – Understanding the effect of CO exposure
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The maximum allowable concentration for continuous exposure for healthy adults in any
8-hour period, according to OSHA*.
Slight headache, fatigue, dizziness, nausea after 2-3 hours.
Frontal headaches within 1-2 hours, life threatening after 3 hours.
Dizziness, nausea and convulsions within 45 minutes. Unconsciousness within
2 hours. Death within 2-3 hours.
Headache, dizziness and nausea within 20 minutes. Death within 1 hour.
Headache, dizziness and nausea within 5-10 minutes. Death within 25-30 minutes.
Headache, dizziness and nausea within 1-2 minutes. Death within 10-15 minutes.
Death within 1-3 minutes.
50 ppm
200 ppm
400 ppm
800 ppm
1,600 ppm
3,200 ppm
6,400 ppm
12,800 ppm
Reminder: This chart relates to the exposure of healthy adults.
Concentration
of CO in the Air
(ppm = parts per million) Approximate Inhalation Time and Symptoms Developed
Understand the Effects of Carbon Monoxide Exposure:
* Occupational Safety and Health Administration
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