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

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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