Most people spend around 90% of their time time indoors, at home or in the office.
The EPA – Environmental Protection Agency claims the quality of air indoors can 
be 100 times worse than outdoors.
Some factors contribute to indoor contamination:
-  High concentration of people in rooms increase fungus, bacteria and vi
-
rus development, and cross contamination
-  New building insulation techniques reduce outside air interchanges and 
consequently air conditioning running cost, but in turn drastically increase mold, 
and bacteria colonies
-  Deficient air conditioning duct cleaning
-  Concentration of organic material such as books, carpeting, curtains, 
and sofas.
Good air quality indoors is a must for those affected by respiratory diseases and 
allergies. 
Contaminated indoor air (fungus, airborne allergens, pollens, ozone) can trigger
-  Asthma, bronchitis, rhinitis, and sinusitis
-  Fungal infections in immune depressed patients
-  Eye, throat and nose irritation
-     Headaches, lethargy, irritability
-     Cough and difficulty in concentration 
Relation between microorganisms and related diseases.
Inocolums(*) X  Virulency (**) 
   human Resistance
(*) Quantity of microorganisms  (**) Microorganism aggressiveness
The higher “Inocolums” and “Virulency” and or the lower “Human resistance” 
results in greater contamination risk to people. The main contamination causes 
are several types of fungus, (some of them already resistant to the most power
-
ful chemicals and poisons), bacteria, viruses, the fine dust 
mite excrements and 
skeletons containing powerful allergens and hazardous fungus, and the seasonal 
pollens.
  Airfree can safely and silently destroy those allergens
The Invisible 
Enemies
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