Jim Rosenthal:
"In thinking about the program, the one thing I wish I would have said is that engineers should not be afraid to challenge accepted assumptions. It took 2 years to overcome the "#droplet dogma".
We have always "assumed" that a #HEPA air cleaner with a 99%+ efficiency on <1 um particles would outperform a #MERV13 with 50% efficiency. We were wrong as shown here.
Awesome info there. Do you have a link to a study on this?