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When all nine segments are lit, you’re all set to get your work done – the air composition is ideal
for intellectual work. If the display shows only one segment, the CO2 concentration in the air
around you is critically high.
To get precise info about how the air helps your productivity, provide that nothing obstructs the
air inlet to the Altos air intake.
Here’s a correlation of Brain Fuel index and CO2 concentration level:
CO2, ppm
Number of
segments on
Brain Fuel index
Tip
Less than 449
9
Ideal
Air composition
optimal for
productive work.
Keep it up!
450 - 499
8
500 - 599
7
600 - 699
6
Fair
These CO2
concentrations
might impair your
brain performance.
Let some air in to
stay productive.
700 - 799
5
800 - 899
4
900 - 999
3
Poor
CO2 concentration
is too high and
significantly
decreases your
cognitive
capabilities. Have a
1000 - 1499
2