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2. Indoor air quality - Wikipedia

   en.wikipedia.org/wiki/Indoor_air_quality

   Portable room air cleaners with HEPA filters can be used if ventilation is poor or outside air has high level of PM 2.5. [122] Air filters are used to reduce the amount of dust that reaches the wet coils. [citation needed] Dust can serve as food to grow molds on the wet coils and ducts and can reduce the efficiency of the coils. [citation needed]

3. Passive smoking - Wikipedia

   en.wikipedia.org/wiki/Passive_smoking

   The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) officially concluded in 2005 that while completely isolated smoking rooms do eliminate the risk to nearby non-smoking areas, smoking bans are the only means of eliminating health risks associated with indoor exposure.

4. Sick building syndrome - Wikipedia

   en.wikipedia.org/wiki/Sick_building_syndrome

   An air quality monitor. Human exposure to aerosols has a variety of adverse health effects. [7] Building occupants complain of symptoms such as sensory irritation of the eyes, nose, or throat; neurotoxic or general health problems; skin irritation; nonspecific hypersensitivity reactions; infectious diseases; [8] and odor and taste sensations. [9]

5. Manage Pesky Allergens With the Best Air Purifiers We ... - AOL

   www.aol.com/breathe-easy-air-purifiers-protect...

   Air purifiers work by using a fan to draw air into the unit and pass it through a series of filters to remove particles and contaminants. These filters vary in effectiveness, and normally target a ...

6. Air purifier - Wikipedia

   en.wikipedia.org/wiki/Air_purifier

   An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics , and at reducing or eliminating second-hand tobacco smoke .

7. Smoking’s effects on the immune system can last years ... - AOL

   www.aol.com/smoking-effects-immune-system-last...

   Smoking tobacco is so harmful to the body that it changes a person’s immune system, leaving them vulnerable to more disease and infection even years after they’ve quit, a new study found.