IIRC, increased surface area reduces pressure. From what I remember from reading the thread, it appeared to have pretty decent CFM through the use of more and l

IIRC, increased surface area reduces pressure. From what I remember from reading the thread, it appeared to have pretty decent CFM through the use of more and larger filters. EDIT: I found the thread. See https://twitter.com/davidelfstrom/status/1429526273009889286?s=10 https://twitter.com/davidelfstrom/status/1429526273009889286... Thread shows the difference between using 1 and 2 filters. I think he has a separate thread in his Twitter feed measuring a 4/5 filter setup too.