What was the rationale behind cleaning the air above people’s heads—was eye safety the main concern for you?
To clean the air between the people you need UVC on the ceiling pointed down, and you need a lot of lamps. This isn’t something we’d be able to set up in a hall we don’t own. Additionally, the efficacy of UVC is proportional to the distance the rays traverse, so we’re getting a lot more benefit from an emitter aimed above people than we would from downward facing ceiling-mounted ones.
Eye safety is something we’re thinking about, but the risk is at close range. With all of the options we’re considering the lamps are at least five feet from anyone’s eyes, which is more than enough for safety.
Did you also do any prior modeling of the space before the setup?
To clean the air between the people you need UVC on the ceiling pointed down, and you need a lot of lamps. This isn’t something we’d be able to set up in a hall we don’t own. Additionally, the efficacy of UVC is proportional to the distance the rays traverse, so we’re getting a lot more benefit from an emitter aimed above people than we would from downward facing ceiling-mounted ones.
Eye safety is something we’re thinking about, but the risk is at close range. With all of the options we’re considering the lamps are at least five feet from anyone’s eyes, which is more than enough for safety.
We did a little modeling on the UV setup, yes!