| CO Level |
Action |
| 1-4ppm |
Normal levels in human tissues produced by body. |
| 3-7ppm |
14% increase in the rate of admission in hospitals of non-elderly for asthma. (Sheppard-1999) |
| 5-6ppm |
Significant risk of low birth rate if exposed during last trimester (Ritz & Yu-1999) |
| 5ppm |
1st visual display on NSI 3000 Low Level CO Monitor |
| 9ppm |
ASHRAE standard for allowable spillage from vented appliances, indoors, for 8 hours exposure daily. EPA standard for outdoors for 8 hours and a maximum 3 times per year. (Clean Air Act) |
| 10ppm |
Outdoor level of CO found associated with a significant increase in heart disease deaths and hospital admissions for congestive heart failure. (JAMA, Penny) lst ambient level occupants should be notified-NCI Protocol |
| 15-20ppm |
First level World Health Organization lists as causing impaired performance, decrease in exercise time and vigilance 1st Alarm level for NSI 3000 Low Level CO Monitor-5 minutes |
| 25ppm |
Maximum allowable in a Parking Garage (International Mechanical Code) |
| 27ppm |
21% increase in cardio respiratory complaints (Kurt-1978) |
| 30ppm |
Earliest onset of exercise induced angina (World Health Organization) 1st visual display on UL2034 approved CO Alarm-Must not alarm before 30 days |
| 35ppm |
US NIOSH recommended 8 hour maximum workplace exposure EPA standard for outdoors for 1 hour and a maximum of 1 time per year Level many fire departments wear breathing apparatus before entering 2nd ambient level occupants should be notified and space ventilated 2nd Alarm level for NSI 3000 Low Level Monitor-5 minutes |
