A5(1) It is clear that ventilation reduces transmission
- Ballistic droplets & close proximity aerosols not affected by vent.
- Only shared-room-air aerosol transmission impacted by ventilation. This is a major pathway of transmission
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A5(2) "ventilation" here = remove virus from the air
- A fan that moves air around is not ventilation
- 2 things:
(a) expel indoor air outdoors, bring clean air indoors (open windows, or through mechanical HVAC systems)
(Details: sciencedirect.com/science/articl…)
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A5(3) Second thing to do:
(b) Filtration: either through HVAC systems (MERV 13 if possible), or through portable HEPA filters, or through cheaper fan-filters.
Extensive details: tinyurl.com/FAQ-aerosols
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A5(4) There are other types of air cleaners.
- UV is good, but needs professional installation for several reasons (see 9.8 in tinyurl.com/faqs-aerosol)
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A5(5) We don't recommend other types of air cleaners. Stick w/ ventilation w/ outdoor air, filtration if needed, and UV is really needed.
More details:
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