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H
1
Press each category to find its description and improvement method.
2
CO
2
It is a colorless, odorless, non-flammable, and non-combustible gas.
A crowded room with poor ventilation would increase the concentration of
carbon dioxide.
Common of CO2 sources at home are human breathing, smoking, heating
appliances and candles.
<500
<1000
ppm
ppm
PM2.5
Methods to improve: ventilation
PM2.5 easily penetrates human lungs and it has a great impact on health.
The smaller the particles are, the further it floats. It is not easy to intercept the
particles in respiratory tract, and PM 2.5 is very harmful to the respiratory system.
Secondhand smoke and kitchen fumes are the main sources of PM2.5.
< 3
µg/m
3
Methods to improve: using air filters
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to return to the main screen
1000
ppm
Fungi
1200
< 3000
ppm
µg/m
3
35
< 20
µg/m
3
< 35
µg/m
3
TVOC
Total Volatile Organic Compounds is grouping of a wide range of organic chemical
compounds that are present in polluted air.
They are generally refer to vapors of gases given off by compounds.
Methods to improve: Ventilation, improvement of
ventilation systems, replacement of building materials,
installation of air cleaners, activated carbon adsorbents
13 :09
28
65
35
/
°C
%
db
二 氧 化 碳
懸 浮 微 粒
CO
PM 2.5
2
1500
7
/
ppm
µg/ m
3
一 氧 化 碳
懸 浮 微 粒
CO
PM 10
3
15
/
ppm
µg/ m
3
黴菌
甲 醛
揮 發 物 質
HCHO
TVOC
0.01
0.23
/
/
C FU /
m
3
ppm
ppm
0.56
ppm
O
3
Ozone may stimulate the respiratory tract, causes coughs, asthma, headaches,
and chest pain, reduces pulmonary functions and leads to bronchitis. It may
cause serious problems such as pulmonary edema, pulmonary emphysema and
other cardiorespiratory issues and eye irritation as well.
Methods to improve: Ventilation
Humidity
Humidity between 60 to 70% is regarded as the best condition for people.
Wa r m a n d d a m p a r e a s w i t h o u t p ro p e r v e n t i l a t i o n a r e a h o t b e d f o r m o l d .
When the humidity is 70 to 90% in a non-ventilated environment for a long time,
mold will rapidly grow. Mold attract dust mites. Thus, allergies such as rhinitis,
asthma, arthritis, gastroenteritis among others can easily develop in a high
humidity space.
H U M I
H U M I
60~70
%RH
80~90
%RH
Methods to improve: drying, dehumidifying
0.06
ppm
70
%
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