Flexible frames are available for applications where a rigid frame cannot be used. Flexible framed filters have a 1/2" polyester layer and an resin stiffener applied between 2 layers of polypropylene and a polypropylene webbing frame which is sewn around the edge. These 5/8" thick filters fit most 1" applications.

The 0.08 inch W.G. initial resistance of the FLEX 82 will assure sufficient air flow to minimize concerns about freezing coils or overheating heat exchangers.