IAQ Research of the Month – August 2021

Aug 31, 2021

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

Research Summaries

For spaces where cognitive performance is a priority, the environment should be comfortably cool rather than warm or neutral. Indoor Air

PM2.5 indoors may impact depression and increasing HVAC filter efficiency showed minor reductions in depressive disorders. Science of The Total Environment

In other PM2.5 research… Elevated long-term exposure to PM2.5 was associated with an increased hazard of all-cause dementia. Environmental Health Perspectives

Under certain scenarios, the chronic risk of air fresheners (especially sprays) could exceed selected health reference standards. Indoor Air

Water-soluble IAQ contaminant gases can be removed when passing through a wet air-conditioning coil, although there are many contributing variables. Environmental Science & Technology

In a developing nation, liquid petroleum gas (LPG) cookstoves significantly reduced carbon monoxide exposures when compared to traditional practices and biomass stoves. Nature JES

This review showed no confirmed evidence that low-level radiofrequency fields used by 5G networks are hazardous to human health. Nature JES

Airborne transmission may be the dominant form of transmission for several respiratory pathogens, including SARS-CoV-2, influenza virus, and human rhinovirus. Science

Worksite temperature screening was ineffective for detecting workers with COVID-19 and is not recommended. Journal of Occupational and Environmental Medicine

SARS-CoV-2 is evolving toward more efficient airborne transmission and loose-fitting masks provide significant but only modest source control. Pre-print

Featured Online Course: CMR

There are several organizations that offer mold remediation certifications. Only one organization offers certifications that are CESB accredited: the American Council for Accredited Certification (ACAC). ACAC maintains multiple levels of mold remediation certification. If you have two years of experience you can qualify for the Council-certified Microbial Remediator (CMR) and if you have 8 years of experience you can qualify for the Council-certified Microbial Remediation Supervisor (CMRS). They even have a non-accredited designation for individuals that are new to the industry (CRMR).

Our online Microbial Remediator Course prepares you for all three of the ACAC mold remediation certifications. You can access the online content at any time of day or night. The format is an online PowerPoint presentation taught by Ian Cull with synchronized audio and practice questions.

To learn more about this course, visit our page: Microbial Remediator Course.

Additional Resources


If you are passionate about research and the practice of indoor air quality, you won’t want to miss the Healthy Buildings conference November 9-11 in Honolulu, HI. It will be a great time to learn and network.  I hope to see you at Healthy Buildings 2021

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