That is correct. Fiberglass media is practically worthless though.
Recently purchased a custom made aluminum frame filter with screen and hinged sides. Am I correct in assuming that the direction of air flow should be first through the filter material and then screen with screen closest to coil
I've discovered a natural law - everything gets progressively worse. Things only break down and become depleted. Life isn't worth living and everything is going to hell.
Death is the messiah. Everything else is irrelevant and arbitrary.