Aerosols, COVID-19 and HVAC

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Luke Powell’s presentation to the Louisville ASHRAE Chapter on October 21, 2020

Webinar Recording: Louisville ASHRAE Oct. 2020 Meeting

Notes PDF: Aerosols COVID-19 and HVAC – Notes from Louisville ASHRAE Presentation

Side Deck: Aerosols, COVID-19 & HVAC – Slide Deck

References:

How can airborne transmission of COVID-19 indoors be minimised? https://www.sciencedirect.com/science/article/pii/S0160412020317876?via%3Dihub

Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARS-CoV-1 https://www.nejm.org/doi/full/10.1056/nejmc2004973

Transmission of SARS-CoV-2 by inhalation of respiratory aerosol in the Skagit Valley Chorale superspreading event – https://scholar.colorado.edu/concern/articles/n583xw008

Putting a balance on the aerosolization debate around SARS-CoV-2 – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219351/

Short-range airborne route dominates exposure of respiratory infection during close contacthttps://www.sciencedirect.com/science/article/abs/pii/S0360132320302183

Generation and Behavior of Airborne Particles (Aerosols) – https://www.cdc.gov/niosh/topics/aerosols/pdfs/Aerosol_101.pdf

Filtration Efficiencies of Nanoscale Aerosol by Cloth Mask Materials Used to Slow the Spread of SARS-CoV-2 – https://pubs.acs.org/doi/10.1021/acsnano.0c05025

Airborne Transmission of SARS-CoV-2: A Virtual Workshop – https://www.nationalacademies.org/event/08-26-2020/airborne-transmission-of-sars-cov-2-a-virtual-workshop

COVID-19 Outbreak Associated with Air Conditioning in Restaurant, Guangzhou, China, 2020 – https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article

If the coronavirus is really airborne, we might be fighting it the wrong way – https://www.technologyreview.com/2020/07/11/1005087/coronavirus-airborne-fighting-wrong-way/

The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7275719/

Air, Surface Environmental, and Personal Protective Equipment Contamination by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) From a Symptomatic Patient – https://jamanetwork.com/journals/jama/fullarticle/2762692

Dynamics of airborne influenza A viruses indoors and dependence on humidity https://pubmed.ncbi.nlm.nih.gov/21731764/

Enhanced spread of expiratory droplets by turbulence in a cough jet – http://ir.nsfc.gov.cn/paperDownload/991561952.pdf

Ventilation and laboratory confirmed acute respiratory infection (ARI) rates in college residence halls in College Park, Maryland – https://pubmed.ncbi.nlm.nih.gov/32028176/

Aerosol emission and superemission during human speech increase with voice loudness https://www.nature.com/articles/s41598-019-38808-z

Animal and translational models of SARS-CoV-2 infection and COVID-19 – https://www.nature.com/articles/s41385-020-00340-z

Japanese Supercomputer shows humidity effect on COVID-19- https://www.youtube.com/watch?v=4TUrsRvKZOc

This Overlooked Variable Is the Key to the Pandemic – https://amp-theatlantic-com.cdn.ampproject.org/c/s/amp.theatlantic.com/amp/article/616548/

SARS-CoV-2 Transmission Dynamics Should Inform Policy – https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3692807

Efficacy of face masks, neck gaiters and face shields for reducing the expulsion of simulated cough-generated aerosols – https://www.medrxiv.org/content/10.1101/2020.10.05.20207241v1

Effects of Internal Partitions on Flow Field and Air Contaminant Distribution under Different Ventilation Modes – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266261/

ASHRAE Position Document onInfectious Aerosol – https://www.ashrae.org/file%20library/about/position%20documents/pd_infectiousaerosols_2020.pdf

Americans, we can fight COVID-19 and save lives now. Wear a mask! – https://www.usatoday.com/story/opinion/2020/10/08/wear-mask-fight-covid-19-and-save-lives-now-medical-experts-column/5907452002/

Association Between Universal Masking in a Health Care System and SARS-CoV-2 Positivity Among Health Care Workers – https://jamanetwork.com/journals/jama/fullarticle/2768533#jld200077f1

Particle Size Distribution of Mainstream Tobacco and Marijuana Smoke: Analysis Using the Electrical Aerosol Analyzer – https://www.atsjournals.org/doi/abs/10.1164/ajrccm/140.1.202?journalCode=arrd

ASHRAE Position Document on Environmental Tobacco Smoke – https://www.ashrae.org/file%20library/about/position%20documents/pd_environmental-tobacco-smoke-2020-07-1.pdf

Thirdhand smoke uptake to aerosol particles in the indoor environment – https://advances.sciencemag.org/content/4/5/eaap8368

Scientific Brief: SARS-CoV-2 and Potential Airborne Transmission – https://www.cdc.gov/coronavirus/2019-ncov/more/scientific-brief-sars-cov-2.html

The effect of temperature and humidity on the stability of SARS-CoV-2 and other enveloped viruses – https://www.biorxiv.org/content/10.1101/2020.10.16.341883v1

Could a Janky, Jury-Rigged Air Purifier Help Fight Covid-19?- https://www.wired.com/story/could-a-janky-jury-rigged-air-purifier-help-fight-covid-19/

Effect of ventilation improvement during a tuberculosis outbreak in underventilated university buildings – https://onlinelibrary.wiley.com/doi/full/10.1111/ina.12639

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