Comment by vbelenky

You can filter viruses with mechanical air filters, but based on the available data, far-UVC can do this much faster than even a high-CADR air filter. The best filter I'm aware of can deliver 200 CFM of clean air quietly or 400 CFM loudly, one high-quality far-UV lamp can deliver the equivalent of ~1000 CFM--silently. That seems like the main advantage to me--plus not taking up the floor space that a large, quiet air filter would require. Basically it's the more dakka solution. But it's recommended to use far-UV with at least one source of mechanical air mixing like an air filter anyway just to make sure its maximally effective