5 ms·
Can someone explain how a garden-varity HEPA filter duct-taped to a boxed fan is not a complete solution to airborne COVID droplet air filtration? This device
by DenisM 6y ago
Can someone explain how a garden-varity HEPA filter duct-taped to a boxed fan is not a complete solution to airborne COVID droplet air filtration?
This device cleans up a medium size room from forest-fire smoke in 15 minutes and scrubs it squeaky-clean in a few hours (as measured with a laser particulate counter).
- Pulcinella 6y agoNot fast enough. The threat is not being exposed to droplets hours after someone with COVID was in the room, the threat is them expelling COVID particles at your face because to are right next to them.
- sp332 6y agoHEPA filters are a good idea, but they can be in short supply and they need to be replaced on a regular basis. Box fans are not good for attaching filters too because they are not designed to deal with static pressure from a filter. The gaps between the blades and the case mean if you put much/any obstacle in the way, it will just recirculate unfiltered air.