CO Concentration

Breathe E-Z Systems, Inc.

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Parts Per Million

% of CO  in Air

Inhalation Time and Toxic Symptoms Developed

0 - 1

 .0001

Normal background levels

9

 .0009

Maximum allowable concentration short term in living area (ASHRAE)

25

 .0025

Maximum exposure TWO (Time Weighted Average) (ACGIH) in the workplace

50

.005

Maximum exposure allowed (OSHA) in the workplace

200

.02

Mild headache, fatigue, nausea and dizziness

400

.04

Serious headache - other symptoms intensify. Life threatening after 3 hours.

800

.08

Dizziness, nausea and convulsions.  Unconscious within 2 hours, dead within 2 to 3 hours.

1600

.16

Headache, dizziness and nausea. Death within 1 - 2 hours.

3200

.32

Headache, dizziness and nausea. Death within 1 hour.

6400

.64

Headache, dizziness and nausea. Death within 25 - 30 minutes.

12,800

1.28

Death within 1 - 3 minutes.