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Manufactured in South Africa, the Filtaire S.A. cc Washable Wire Support Panel Filter, class Merv 8 according to ASHRAE Standard 52.2-2007, equivalent to class G4 to EN 779:2002 (30% ≤ Em < 35%).

Manufactured from a polyester non-woven fine filament that is mechanically pleated and heat set to form a consistent, uniform pleat.


The filter media shall be genuine WIRECOR progressive efficiency type comprising a first stage of
120g/m² high lofted uncoated needled polyester fibre mat followed by a second stage of 230g/m²
acrylic coated needle polyester fibre mat which shall allow full depth dust loading negating the
face loading tendency of most continuous efficiency media.

The first and second stage media shall be permanently bonded together by hot melt coated
1,2mm diameter galvanized wire spaced at intervals of no more than 50mm by the WIRECOR
media manufacturing process.

The lateral internal heavy duty wire support when pleated shall keep the pleat in shape after
washing and prevent pleat vibration and collapse, a tendency of self-supported panel filters
after washing and under high airflow conditions.

The effective filter media area shall be not less than 3,4m² of media per m2 of filter face area and shall contain not less than 42 pleats per linear m for a 50mm deep filter.  For 150mm deep media area shall be not less than 7,9m² per m² of filter face.

Initial pressure drop at 2,5 m/s approach velocity shall not exceed 60 – 80Pa for 50mm deep and 30 – 40Pa for 150mm deep.  The filter media shall have an average ASHRAE arrestance of 90%.  The media shall be colour coded for correct directional placement in filter bank, white for first stage and blue for second stage.


The enclosing frame shall be modular type, the components manufactured from corrosion resistant steel with a minimum thickness of 0,5mm.  The sides shall have returned edges of at least 10mm for extra strength and safety when handled.

The corner pieces shall guarantee during manufacture that the finished filters are always square.  The inside periphery of the enclosing frame shall be permanently bonded to the media pack with expanded urethane thus eliminating the possibility of air bypass.

A permanent identification and airflow direction label shall be affixed to the filter frame.