IAQ Research of the Month – November 2021

Nov 30, 2021

This newsletter summarizes new research related to indoor air quality (IAQ)

Research Summaries

Buildings can protect their occupants from outdoor particulate pollution. Protection increases with larger particle sizes (10 μm) compared to smaller (0.1 μm). Atmospheric Environment

 


In a study of domestic cleaners, the VOC with the greatest average concentration was d-limonene, a common additive in cleaning products. Journal of Occupational and Environmental Hygiene


Within one week of operating a portable ultrasonic humidifier to maintain 70% relative humidity, airborne bacteria concentrations exceeded 1,000 CFU/m3. Indoor Air


Indoor airborne bacteria were significantly different between three building types tested: commercial buildings, residences, and subways. Environmental Science & Technology


Facially applied personal care products, such as moisturizers, have the potential to deliver enhanced VOC doses via inhalation due to close proximity of the nose and mouth to the emission source. Indoor Air


Personal exposure to PM2.5 is not necessarily correlated to outdoor levels. Environmental Research


Elevated and hazardous levels of airborne particles and formaldehyde may be encountered following a structural fire. Journal of Occupational and Environmental Hygiene


No correlations between IAQ parameters could be associated with positive/negative SARS-CoV-2 samples. Journal of Occupational and Environmental Medicine


Persistent physical symptoms after COVID-19 infection should not be automatically ascribed to SARS-CoV-2. JAMA Internal Medicine


Respiratory aerosol emissions were higher in adults, males, and people singing vs. talking. Environmental Science & Technology Letters

Featured Online Course: CMI/CMC

If you are interested in obtaining a certification related to moisture, mold, and other microorganisms found indoors, consider taking our Online Microbial Investigator Course.  Our online course prepares you for certifications offered by the American Council for Accredited Certification (ACAC) including the Council-certified Microbial Investigator (CMI) and the Council-certified Microbial Consultant (CMC).

The content is pre-recorded so you can access the course at any time of day or night.  To learn more about this course, visit our page: Microbial Investigator Course.

Additional Resources

On behalf of Indoor Sciences, I wish you and your family a holiday season filled with love, warmth, and good cheer!

Ian Cull, PE, CIH
[email protected]
(312) 920-9393

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