Health effects are related to the level of CO concentrations and length of exposure
- 12,800 ppm Death within 1 - 3 minutes*
- 1,600 ppm Nausea within 20 minutes. Death within 1 hour*
- 800 ppm Nausea and convulsions. Death within 2 hours*
- 400 ppm Frontal headaches 1 to 2 hours. Life threatening after 3 hours*
- 50 ppm Maximum concentration for continuous exposure in any 8-hour period (OSHA)
- 9 ppm Acceptable level of CO in a living space above outdoor ambient conditions (ASHRAE)
- 0 ppm Desirable level
*Health effects can vary significantly based on age, sex, weight and overall state of health.
