Debbie Goldsmith 🏳️‍⚧️♾️🇺🇦Jun 7, 2023
@[email protected] @mekkaokereke I have two big HEPA air filter machines (one downstairs, one upstairs) as well as a particulate monitor. The filter machines were running on their highest setting during the California fires. I had to wear noise-cancelling headphones to sleep.
Show threadJames Widman
@dgoldsmith @[email protected] @mekkaokereke
note, a corsi-rosenthal box with an array of PC fans should be quieter *and* filter more air:
https://twitter.com/joeyfox85/status/1612263292927369216
Joey Fox on Twitter

“Look at this. 556 CFM at less than 45 dB. That's 4.4 air changes per hour in a classroom. To put that in context, classic box fan CR box is 275 CFM at 52 dB. (5x as loud, but still beats almost all HEPA filters) This is the classic CR Box on steroids. https://t.co/3cdJa5moPz”

Twitter
Jun 7, 2023 at 9:56amWeb