I AM PLEASED to report that the air purification device described HERE was installed today.
This means that:
- We are significantly reducing the airborne transmission of disease inside our school building — as long as the HVAC blower is on, and the hallway doors are kept ajar, so that the air can keep circulating throughout the building.
- To reiterate, the hallway doors need to be propped open by about an inch whenever possible, in order for this device to work its magic.
- The school building can now revert to using a standard MERV-8 air filter rather than a hospital-grade MERV-13 filter (which is not only more expensive but also shortens the life of the blower motor).
Below the jump, I give links to evidence that the ions produced by this device are indeed effective at neutralizing airborne pathogens directly, quite apart from whether the resulting agglomeration is ever trapped by the system’s air filter.…
Sobek E, Elias DA. Bipolar ionization rapidly inactivates real-world, airborne concentrations of infective respiratory viruses. PLoS One. 2023 Nov 22;18(11):e0293504. doi: 10.1371/journal.pone.0293504. PMID: 37992037; PMCID: PMC10664916.
Assadi I, Guesmi A, Baaloudj O, Zeghioud H, Elfalleh W, Benhammadi N, Khezami L, Assadi AA. Review on inactivation of airborne viruses using non-thermal plasma technologies: from MS2 to coronavirus. Environ Sci Pollut Res Int. 2022 Jan;29(4):4880-4892. doi: 10.1007/s11356-021-17486-3. Epub 2021 Nov 18. PMID: 34796437; PMCID: PMC8601095. [N.B.: The relevance of this article is that needlepoint bipolar ionization devices produce a non-thermal plasma in their vicinity.]
Comini S, Mandras N, Iannantuoni MR, Menotti F,Musumeci AG, Piersigilli G, Allizond V, Banche G,Cuffini AM.2021. Positive and Negative Ions Potently Inhibit the Viability of Airborne Gram-Positive and Gram-Negative Bacteria. Microbiol Spectr9:e00651-21. doi: 10.1128/Spectrum.00651-21
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