Part 2 of 4 – Carbon Monoxide Detectors
Potential Sources of Carbon Monoxide
Any fuel-burning appliances which are malfunctioning or improperly installed can be a source of CO, such as:
- furnaces;
- stoves and ovens;
- water heaters;
- dryers;
- room and space heaters;
- fireplaces and wood stoves;
- charcoal grills;
- automobiles;
- clogged chimneys or flues;
- space heaters;
- power tools that run on fuel;
- gas and charcoal grills;
- certain types of swimming pool heaters; and
- boat engines.
| PPM | % CO in air |
Health Effects in Healthy Adults | Source/Comments |
| 0 | 0% | no effects; this is the normal level in a properly operating heating appliance | |
| 35 | 0.0035% | maximum allowable workplace exposure limit for an eight-hour work shift | The National Institute for Occupational Safety and Health (NIOSH) |
| 50 | 0.005% | maximum allowable workplace exposure limit for an eight-hour work shift | OSHA |
| 100 | 0.01% | slight headache, fatigue, shortness of breath, errors in judgment |
|
| 125 | 0.0125% | workplace alarm must sound (OSHA) | |
| 200 | 0.02% | headache, fatigue, nausea, dizziness |
|
| 400 | 0.04% | severe headache, fatigue, nausea, dizziness, confusion; can be life-threatening after three hours of exposure | evacuate area immediately |
| 800 | 0.08% | convulsions, loss of consciousness; death within three hours |
evacuate area immediately |
| 12,000 | 1.2% | nearly instant death |
Scott Price, CPI, #1532
Certified Home Inspector
Home Run Inspections
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