NEW from our Harvard Healthy Buildings team
We used CFD modeling to evaluate the effectiveness of portable air cleaners to help remove airborne pathogens and mitigate disease transmission in schools
[tl/dr: portable air cleaners work]
THREAD
Portable air cleaners work!
We found that portable air cleaners w a clean air flow rate of 2.6 h−1 reduce mean aerosol intake of all students by up to 66%
Air mixing matters!
**A key benefit of using PACs is to facilitate
air mixing and movement in indoor environments with inadequate ventilation**
Placement matters!
Closest to infector is best (duh), but this is never known. So our results found that, in the absence of knowing who is infected, deploying a PAC at the
center of the room is recommended.
Discharge height matters!
We found that adjusting PAC flow discharge height to the breathing height of occupants (e.g., 0.9–1.2 m for seated people) can enhance their effectiveness in spaces with poor air mixing
There's a lot more that matters!
Have a read:
Big thanks and congrats to Dr. @Gen_Pei_ who led the work, alongside Dr. @parhamazimi_87 and Dr. @RimIAQ pubs.rsc.org/en/content/art…
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