4
35ppm
- The maximum allowable concentration for continuous exposure for healthy adults in any 8
hour period, as recommended by the Occupational Safety and Health Administration
(OSHA).
200ppm
- Slight headache, fatigue, dizziness, nausea after 2-3 hours.
400ppm
- Frontal headaches within 1-2 hours, life threatening after 3 hours.
800ppm
- Dizziness, nausea and convulsions within 45 minutes. Unconsciousness within
2 hours. Death within 2-3 hours.
Should you suspect CO may be affecting you or your family, open the doors and windows of your
residence to ventilate, turn off your appliances and evacuate the premises. At this time the authorities
should be contacted to locate the source of the carbon monoxide before re-entering the building. Medical
attention should be sought for anyone suffering the effects of CO poisoning (headache, nausea, see page
3).
Common Sources of CO
• Oil and gas furnaces
• Wood stoves
• Barbecues
• Wood or gas fireplaces
• Gas appliances
• Portable generators
• Gas or kerosene heaters
• Clogged chimneys
• Cigarette smoke
• Any fossil fuel burning appliance