Viskon-Aire 464-120 Series 55 Internal Wire Intake Panel Filter | 8 pc

The Viskon-Aire Series 55 self-seal panel filters are manufactured from high quality synthetic 2-ply polyester fibers. The media is progressively structured and the internal wire supports and heat sealed seams eliminate media flutter and particle migration. The internal steel wire frame is welded and springs into place with a force fit into the filter holding frame eliminating any air bypass around the filter. Quantity: 8 filters per case  Size: 20" x 48" x 7/8" T filters. Exclusive PBT 32TM tackifier on downstream layer Two layers of 100% polyester media Heat sealed to a 11 ga internal support frame External gasketing for a tight, no by pass fit Optimizes plenum pressurization for even air flow Self-extinguishing media Panel filters self-seal to eliminate any air by pass