IAQ Research of the Month – June 2021

Jun 30, 2021

This newsletter highlights recent research related to indoor air quality (IAQ) and COVID-19.

Research Summaries

The association between moisture damage in schools and respiratory health could not be consistently explained by individual species of microorganisms. Bacterial markers were more strongly associated with respiratory symptoms than fungal markers. Indoor Air

On airplanes, carbon dioxide is significantly higher during boarding compared to cruising in-flight, indicating poor air exchange. Indoor Air

Synthetic organic chemicals including pesticides were the primary exposures associated with chemical intolerance. Environmental Sciences Europe

Vaping marijuana indoors impacts IAQ due to emissions of terpenoids, thermal degradation byproducts, and ultrafine particles. Environmental Science & Technology (See also this EHP article)

This study could not find a relationship between temperature and work performance. Building and Environment but…

This study of older adults found that air temperature was the most influential contributor to the acceptability of indoor environmental quality. Building and Environment

Electrostatic clothes (e.g. Swiffers) can provide a useful, practical alternative for collecting mold dust samples undergoing ERMI analysis. JOEH

In a study of 7 different tropical cities around the world, the average monthly indoor RH was 66%. Indoor Air

With quiet mechanical ventilation in the bedroom, sleep efficiency increased by 4% when compared to no mechanical ventilation. Indoor Air

Two recent research papers evaluated indoor environmental risks in a dental office. JOEH and Indoor Air

This study evaluated different samplers for airborne viruses and found that the BioSampler performed best. Indoor Air

This study confirms the low likelihood of infectious SARS-CoV-2 viruses on surfaces, which further disputes the importance of surfaces in COVID-19 transmission. PLOS ONE (See also this F1000 article)

Bulk floor dust is a potentially useful matrix for long-term monitoring of viral disease in high-risk populations and buildings. mSystems

To mitigate airborne transmission of disease in a home, this study found the most effective ventilation strategy was operating an exhaust fan and keeping windows closed in the bedroom of the infected individual.  IJERPH

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Additional Resources



Want to hang out with me… daily?  I am looking to hire a CIH to help run our Chicago area operations. Let me know if you (or someone you know) may be interested!

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