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Indoor Air Quality. “Quality” Indoor Air. Good Indoor Air Quality (IAQ) depends upon... Proper circulation Age of the building Regular maintenance Filtration Humidity levels. Indoor air in schools. One out of every thirteen school-aged children suffer from asthma

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quality indoor air
“Quality” Indoor Air
  • Good Indoor Air Quality (IAQ) depends upon...
    • Proper circulation
    • Age of the building
    • Regular maintenance
    • Filtration
    • Humidity levels
indoor air in schools
Indoor air in schools
  • One out of every thirteen school-aged children suffer from asthma
  • Every year, more than 10 million absentee days are accumulated on account of airborne related illnesses
  • EPA study in 2000 determined 50% of nation’s schools had improperly maintained equipment
student test performance
Student test performance
  • Effect of outdoor air supply rate and filtration
    • Speed of 4 of 7 tests performed improved significantly when outdoor air supply rate increased
    • No sig. effect on test scores
  • Effect of moderately raised temperatures
    • When temps reduced from 25 to 20 degrees Celsius, performance (speed) improved in 2 numerical and 2 language based tests
  • Effect of particle filtration
    • So significant effects on performance

Wargocki and Lyon, 2006. Wargockiet al., 2007.

indoor air pollutants
Indoor Air Pollutants
  • Radon
  • Carbon Monoxide
  • Ozone
  • Tobacco Smoke
  • Volatile Organic Compounds (VOC’s)
  • Toxic Materials – Asbestos, Lead
  • Biological Aerosols (Bioaerosols)
bioaerosols
Bioaerosols
  • Defined as...
    • Any airborne molecule that is biological in origin
  • can be in the form of gases, vapor, or large particulates.
  • can also be microorganisms themselves

- Fungi, bacteria, viruses, protozoans

bioaerosols1
Bioaerosols

Source: http://www.state.nj.us/health/eoh/peoshweb/bioaero.htm

aerial microbiological contamination
Aerial Microbiological Contamination
  • Study conducted in Italy, Daccarroet al. 2003, looking at airborne microbial communities in gyms
  • Found a higher abundance of “Staph” in the gym compared with outdoors
  • Also, 38 fungi taxa in gyms and 30 outdoors
classroom activities
Classroom activities
  • Growing Airborne Microbes
    • Comparing different areas of the scholastic environment
    • Petri dishes
    • Agar medium
  • Particulate traps
    • Wire hangers, nylon, and petroleum jelly
legionella
Legionella
  • Genus of bacteria
  • Legionnaires disease
  • Flu-like symptoms
  • Domestic hot-water systems and cooling towers
staphlococcus
Staphlococcus
  • Most species harmless
  • Food poisoning
  • More recently, human infections
actinomycetes
Actinomycetes
  • Very common: 1-20 million/ g of soil
  • Look much like fungi but are bacteria
  • Tuberculosis
histoplasma
Histoplasma
  • Histoplasmosis
  • Primarily effects lungs
  • Common in immunodeficent individuals
alternaria
Alternaria
  • Mostly plant pathogens
  • Allergen to humans
pencillium
Pencillium
  • Commonly known as moulds
  • Main cause of food spoilage
  • Produce mycotoxins
  • Many practical applications
aspergillus
Aspergillus
  • Another common mould
  • Some species produce aflatoxins
  • Also, many practical applications
stachybotrys
Stachybotrys
  • Black mold
  • Moist areas
  • Wide range of symptoms
  • Extended exposure: very severe symptoms
dermatophagoides dust mites
Dermatophagoides (dust mites)
  • One of the main causes of asthma
  • Fecal matter higher allergenic
  • Unfortunately, no way to avoid...FOUND EVERYWHERE