Pre-filter roll
Application: ≥5μm , Filter dust (especially used in the train or the subway, where the place has air-conditioner), pre-filter through air filter program
Type: pads or rolls size
Media: synthetic fiber with gradual density.
Washable: about 2-3 times
EN779 class: G2
Average arrestance:75%（ASHRAE52.1-1992）
EUROVENT4/5 class: EU2
DIN53438 Non-flammability Standard: F1
Final resistance: (suggested) 100Pa-(max)200Pa
Max. Dust holding capacity: 430g/㎡
Temperature resistance: 100℃
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