Gregory's Server@isotopp @pezmico @dean For the school contexts that I'm thinking about, home-made won't do – it'd have to be a commercially supplied one from the HVAC company. These things have been around for years; what I'm wondering is whether there is an important reason why they're not being promoted while filtration is.
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2 comments
 @mmlvx @isotopp @pezmico @dean I didn't think to check Wikipedia before, but it turns out that they have a broad-and-thin, inconclusive, but at least reasonably current, summary https://en.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation#Air_disinfection |
@libroraptor @isotopp @pezmico @dean
I get the impression that inside the HVAC ducts, UV is expensive and not super effective, bc air circulates through quicker than viruses get destroyed. You can add more UV lighting inside the ducts, but that gets even more expensive (and adds maintenance and safety issues -- UV shining out of grates, etc.). So high-quality mechanical filtration tends to be more effective. (But UV may be good for reassuring ppl.)