@jimrosenthal5.bsky.social
Interested in filtration and indoor air quality. Lifelong learner.
Yes, these are relatively large particles. Your CR box will easily filter out any airborne pastel dust.
October 1, 2025 at 4:07 PM
Yes, these are relatively large particles. Your CR box will easily filter out any airborne pastel dust.
Reposted
Easy, inexpensive ( at largely under $100) and certified effective by 3M, others, for the last five years. CR boxes used in schools and universities across the country and around the world, thanks to co-inventors @corsiaq.bsky.social and @jimrosenthal5.bsky.social
youtu.be/hIuH-2naozI?...
youtu.be/hIuH-2naozI?...
How to Build a Corsi-Rosenthal Box
YouTube video by UC Davis College of Engineering
youtu.be
September 25, 2025 at 11:56 AM
Easy, inexpensive ( at largely under $100) and certified effective by 3M, others, for the last five years. CR boxes used in schools and universities across the country and around the world, thanks to co-inventors @corsiaq.bsky.social and @jimrosenthal5.bsky.social
youtu.be/hIuH-2naozI?...
youtu.be/hIuH-2naozI?...
Agreed the standardized tests are a very valuable to assess additive air cleaners. The choice to use a picture of a CR Box - an air cleaner that removes contaminates - is unfortunate.
September 5, 2025 at 2:08 PM
Agreed the standardized tests are a very valuable to assess additive air cleaners. The choice to use a picture of a CR Box - an air cleaner that removes contaminates - is unfortunate.
The same type of charlatans are active in the indoor air world. There are plenty of cures for the air very few of which work, but the theory is the same costly non-effective and and wasting time.
July 9, 2025 at 2:23 PM
The same type of charlatans are active in the indoor air world. There are plenty of cures for the air very few of which work, but the theory is the same costly non-effective and and wasting time.
It is pretty hard to beat the particle counter you have for price. (less than $100). I also like it because it gives the size bins by number - not just PM. It's not the most accurate, but OK for most purposes. I also use Dylos, Qingping and Air Knight. Dylos works the best for me.
January 16, 2025 at 4:43 PM
It is pretty hard to beat the particle counter you have for price. (less than $100). I also like it because it gives the size bins by number - not just PM. It's not the most accurate, but OK for most purposes. I also use Dylos, Qingping and Air Knight. Dylos works the best for me.