So this chart is only measuring air thru a filter only no other in line restrictions? I would have not guessed a 25% increase in filter area (14x3 to 14x4) would only gain a much less percentage of air flow. Actually i would have guessed more, thinking the media mounting ends would disrupt air flow, and a taller filter would have less turbulence.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.