Community discussion: managing HVAC in facilities during the Covid-19 shutdown

We don’t know what impact SARS COV-2 has on our HVAC systems. In a letter published in March in the New England Journal of Medicine, researchers described how aerosolized coronavirus particles can remain viable for up to three hours in the air, meaning they could infect a person hours after being expelled. Factors such as humidity levels, ventilation, and routine maintenance can help mitigate the spread of Covid-19. In this community discussion on April 24, 2020, GreenerU's building experts share suggested guidelines for operating buildings during the shutdown.


Printable guidelines

PowerPoint from above

Additional resources

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE),“Message from ASHRAE President Darryl Boyce

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), “Position Document on Infectious Aerosols” (April 14, 2020)

Appalachian State University and North Carolina Department of Natural Resources information compilation

Centers for Disease Controls & Prevention; Lu, Jianyun et al. “COVID-19 Outbreak Associated with Air Conditioning in Restaurant, Guangzhou, China, 2020,” (July 2020; early release)

Cleaning & Maintenance Management, “Open Windows to Prevent the Spread of COVID-19” (April 20, 2020)

Federation of European Heating, Ventilation, and Air Condition Associations (REHVA), “REHVA COVID-19 guidance document: How to operate and use building services in order to prevent the spread of the coronavirus disease (COVID-19) virus (SARS-CoV-2) in workplaces” (April 3, 2020)

GreenerU’s presentation with Chem-Aqua on water management on April 21, 2020

PCB Today, “Indoor humidity regulations will reduce burden of COVID-19” (April 17, 2020)

New England Journal of Medicine, “To the Editor: Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARS-CoV-1” (April 16, 2020)


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