AIR LEVEL QUALITY AND GRADE
1.
When formaldehyde (HCHO) concentration is less than 0.080
mg/m
3
and PM2.5 is less than 55, LCD screen displays Level as
Fresh
in green and air quality is fresh.
2.
When formaldehyde (HCHO) concentration is between 0.080 to
0.300 mg/m
3
or PM2.5 is between 55 to 250 mcg/m
3
, LCD
screen displays Level as
Unqualified
in yellow, meaning air is in a
borderline condition not qualified as
Fresh
but not meeting criteria
for hazardous pollution.
3.
When formaldehyde (HCHO) density is greater than 0.300 mg/m
3
or PM2.5 is greater than 250 mcg/m
3
, LCD screen displays the
Level as
Polluted or Hazardous
in red, meaning air quality is
considered polluted and not safe for prolonged exposure. Corrective
action including ventilation of the area should be taken.
Formaldehyde Level Interpretation
The World Health Organization guideline for indoor air formaldehyde
concentration is 0.10 mg/m
3
(0.08 ppm). The California Air Resources
Summary of Contents for EGVOC-100
Page 3: ......
