#crboxes

RE: https://social.ridetrans.it/@Andres4NY/116931466428900883 Tagging this thread for #SolarPunkSunday... Discussions about building one's own #CorsiRosenthalBox from folks who have built them. These ones use computer fans, which is a lot quieter than the box fans recommended in the original instructions by Corsi. #DIY #CRBoxes #AirCleaners

Scientists Tested a DIY Air Cleaner – And It Beat Expensive Filters By American Chemical Society, March 24, 2025 Excerpt: "As Corsi highlights during his presentation, he and his colleagues recently tested the durability and performance of #CRBoxes by installing units in four locations across the UC Davis campus. They ran them for 2,500 hours — the equivalent of two K-12 school years. "The CR Box filters performed as well or better than comparable #HEPAFilters. The #DIY system was also more effective at clearing particles 1-3 micrometers in diameter than particles 0.35-1 micrometers. For a sense of scale, typical smoke particles are smaller than 1 micrometer, whereas dust and pollen are 0.5-3 micrometers. "Although HEPA filters are more efficient at removing particles in a single pass than the HVAC filters used in the DIY system, Corsi explains, much more air passes through the CR Boxes, leading to more particles being removed from the air. Although the CR Boxes’ effectiveness diminished over time, they still performed better than new and more expensive HEPA air filters for the larger particle size and performed competitively with HEPA for smaller particles over the extended study period." Read more: https://scitechdaily.com/scientists-tested-a-diy-air-cleaner-and-it-beat-expensive-filters/ #DIYAirCleaner #CorsiRosenthalBox #CorsiRosenthalBox #AirCleaners #AirFilters #DIY #WildfireSmoke