Washable Foam Air Filter
Permatron's foam air filter consists of 1/2" thick
20 PPI polyether polyurethane foam supported by expanded metal mesh
on both sides. Two models are
available: Model FFA has a 1" thick aluminum frame and
expanded aluminum mesh support grids. Model FFG comes in
either a 1/2" or 1" thick galvanized steel frame and expanded metal
mesh support grids. Standard and custom sized furnace air
filters available.