Co 2 Levels And Guidelines - Extech Instruments CO220 User Manual

CO Levels and Guidelines
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IMPORTANT LIABILITY NOTE
The CO guideline data provided here is meant for informational purposes only and is not
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intended as a direct recommendation from Extech Instruments or FLIR Systems. The user
must take full responsibility when determining how this information is to be used.
Non‐Enforced Reference levels
 250 ‐ 350 ppm – background (normal) outdoor air level
 350‐ 1,000 ppm ‐ typical level found in occupied spaces with good air exchange.
 1,000 – 2,000 ppm ‐ level associated with complaints of drowsiness and poor air.
 2,000 – 5,000 ppm – level associated with headaches, sleepiness, and stagnant, stale, stuffy
air. Poor concentration, loss of attention, increased heart rate and slight nausea may also
be present.
 >5,000 ppm – Exposure may lead to serious oxygen deprivation resulting in permanent
brain damage, coma and even death.
Regulatory exposure limits
 ASHRAE Standard 62‐1989: 1000ppm: CO
exceed 1000ppm.
 OSHA: 5000ppm: Time weighted average over five 8‐hour work days should not exceed
5000ppm
 Building bulletin 101 (Bb101): 1500ppm. UK standards for schools say that CO
over the entire day (i.e. 9am to 3.30 pm) should not exceed 1500ppm.
 Germany, Japan, Australia, UK: 5000ppm, 8 hours weighted average occupational
exposure limit is 5000ppm.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
concentration in occupied building should not
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TestEquipmentDepot.com
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averaged
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CO220-EU-EN V1.3 07/13