Guide d’Installation sonde E4000
E4000 probe Installation Guide
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10.3.
CO2 Baselines expressed in ppm
200 000
Lethal (deadly) for humans
100 000
Lethal in 10 minutes without an action for resuscitation
40 000
Threshold of irreversible effects on health
5000
Maximum concentration on workplace (8h)
4000
Bedroom poorly ventilated
1000
Significant decrease in intellectual performance. Factor for asthma or
building syndrome. Maximum value allowed inside buildings.
390
Outside air
10.4.
Guide values for VOCs
Currently, there is no specific standard for VOCs in non-industrial settings outside Publicly Available
Establishments (PRAs) in some countries. There are thousands of different VOCs but some are
recognized as a specific health risk and are subject to specific regulations.
However, thresholds can be used for buildings classified as High Environmental Quality with regard to
VOCs.
Leadership in Energy and Environmental Design (LEED) initially used a threshold of 200 μg / m
3
of
TVOC but it proved difficult to implement and was eventually raised to 500 μg / m
3
. The European
Community has attempted to circumvent the problem by using a 300 μg / m
3
TVOC limit without a
single compound contributing more than 10% of the total.
The literature generally seems to agree that 200μg / m
3
represents an "acceptable" level of TVOC and
that 3000μg / m
3
represents a "dangerous" level of TVOC.
However, some would like to raise the threshold between 300 and 3000μg / m
3
. Part of this problem lies
in the fact that some occupants appreciate fragrant VOCs of perfumes (cleaning products, scented
candles, potpourri, so-called deodorants, essential oils, etc.) and try to increase the threshold while other
occupants are not inclined and may actually experience nausea, headaches, and other associated
symptoms.
The following table is recognized by many consultants:
Housing and offices
TVOC levels in μg/m
3
meaning
< 200
Ideal
200-300
Good
300-400
Acceptable
400-500
Marginal
> 500
Bad
