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This high quality F7 filter captures pollens, dust and allergens from the air. Over its life the filter will, as an average, have an 80-90% arrestance on particules 0.4 microns in size and above.
The filter cassette is held in a frame of silicon impregnated cardboard which is fitted with two plastic neck adapters to facilitate maintenance and replacement. This design also permits a range of duct sizes for the same filter cassette.
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The G4 grade sock filter is a quality filter, to filter out dust and pollens from the air. Over its life the filter will, as an average, have 90% arrestance of particles of 5 microns in size and above.