The tricky part is that the benefit is invisible. If it works, nothing happens: people just get sick less often. That is a hard thing to sell to building owners and employers unless the evidence and standards are really solid
Nice to see they mention UV, too. Aerolamp[0] is down to ~$500. If it were $100, it'd be easy to get into offices, too. Heck, if I worked in person, I'd buy a $100 one as an employee.