More DIY COVID fan plus filter from @DavidElfstrom $CDN55 plus tax! We are all E12Ts now part 8888 or something :-) Bonus link: Michael Kalus's DIY fan setup

Discovered Aug 24, 2021. @DavidElfstrom FINAL OPTIMIZATION! Box fan single filter with 400 CFM measured at 120V. Estimated clean air delivery rate is 248 CFM CADR. Power is just 53 W, placing it well into Energy Star level for air cleaners. Room size: 384 sqft (8’ ceilings). Cost: $CDN55 plus some tape. /1
Bonus link: See also my friend Michael Kalus’s blog post on his DIY fan + filter setup: Improving the air in my place
Previously:
- DIY Air Filters For Classrooms? Experts Are Enthusiastic — And A Citizen Scientist Makes It Easy <— we are all epidemiologists e12ts:-) now via this tweet: Great article with Dean Richard Corsi @CorsIAQ on how to build a cheap, effective air purifier. Included are instructions on how to build an air purifier yourself. <– not sure this will be the most effective but I bet something cheap and cheerful like this will work well!