Using The Air Purifier; Understanding The Air Quality Light - Philips 4000i Series User Manual

4 Using the air purifier

Understanding the air quality light

The air quality light automatically goes
on when the air purifier is switched on,
and lights up all colors in sequence� After
approximately 30 seconds, the particle
sensor selects the color that corresponds
to the surrounding air quality of airborne
particles�
The color of the air quality light is
determined by the highest risk index among PM2�5, IAI and Gas readings�
IAI
The professional-grade AeraSense sensor detects
the level of indoor air allergen and with numerical
feedback from 1 to 12 the potential risk level of
indoor air allergens can be displayed� 1 indicates
best air quality�
PM2�5
AeraSense sensing technology accurately
detects and quickly responds to even the
slightest particle change in the air� It provides
you with reassurance with real-time PM2�5
feedback�
Most of the indoor air pollutants fall under
PM2�5 – which refers to airborne particle
pollutants smaller than 2�5 micrometers�
Common indoor sources of fine particles are tobacco smoke, cooking, burning candles� Some
airborne bacteria and the smallest mold spores, pet allergen and dust mite allergen particles
also fall under PM2�5�
GAS
With an advanced gas sensor, a display ranging from
L1 to L4 shows the level change of potential harmful
gases (incl� VOC, odor, etc�) detected� L1 indicates best
air quality�
EN
8
Air quality light color
Blue
Blue-purple
Purple-red
Red
IAI level Air quality light color
1-3 Blue
4-6 Blue-purple
7-9 Purple-red
10-12 Red
PM2�5 level Air quality light color
≤12 Blue
13-35 Blue-purple
36-55 Purple-red
>55 Red
Gas level Air quality light color
L1 Blue
L2 Blue-purple
L3 Purple-red
L4 Red
Air quality level
Good
Fair
Poor
Very poor