The article blathers on for page after page after page talking about technology is back in the '60s and '70s, an experimental technology using UV wavelengths that supposedly don’t bother humans. And systems that only point up in a room like the UV light isn’t going to get reflected into your eyeballs. I get the feeling the author doesn’t have much of a background and was really just trying to stitch a bunch of research together without really understanding most of it.

You can safely blast the shit out of central air ducts, but it doesn’t do anything for infected breathing viruses into the air sitting next to you or the people that touched the bathroom door handle.

I suspect if we see any real non biased studies come out of any of this equipment the difference will be close to within the error bar.

The article talks about this specifically. Far-UV (222nm) doesn’t penetrate skin or eyes and is harmless to humans. The usual UV-C used for disinfection is 254nm and is quite dangerous.

This article is a longer version of “bleach kills it fast - what if that could be brought inside the body somehow?”

Will there be any benefit to say putting it in the air duct? Like on a forced air system the main exhaust from the unit (I’m guessing it’s exhaust but that sounds wrong). I know some air filters are supposed to filter out airborne viruses and whatnot but I have no way of testing that. But I know what ultraviolet will do. And I’d have to assume sitting in the metal ductwork wouldn’t really hurt anything.