The Rigid Cell Filter is a rigid, extended surface, medium to high efficiency filter. Superior performance in high humidity applicationscombined with the elimination of media fiber shedding make this a smart choice over traditional fiberglass high efficiency products. Its high loft ultra fine synthyetic media provides excellent dust holding capacity and coupled with its rigid construction virtually eliminates dust particle unloading downstreamof the filter. A galvanized steel frame, diagonal support bracing, moisture resistant media contour stabilizers and metalspport grid enhance the durability of the filter. This durabiltiy eliminates media oscillation and media pull-away. The media of the filter is adhesively bonded to all four sides of the frame to eliminate air by-pass. The Rigid Cell Filter is available in ASHRAE 40-45%, 60-65%,80-85% and 90-95% efficiencies.