Far-UVC Lights Deactive Majority of Airborne Pathogens

UVC Germicidal Fixtures today are placed inside of the HVAC system to protect people from the the UV light. They use Mercury lamps (λ = 253.7 nm). This can only clean the air that passes through the HVAC and so only works while the HVAC is running.

Looks like this paper is saying we could put up filtered Kr-Cl excimer lamps like standard light fixtures and get more benefits.

My understanding is that UV light can create ozone, which is toxic. So that's a problem. Not saying it is insurmountable.