Glass Fiber Roll Filters are manufactured from odorless, non-flammable glass fiber with a condensed clean air side; due to their structure, they cannot be washed and reused. It is used as a pre-filter in a cassette in ventilation systems and as a floor filter in paint booths to retain paint mist. Dust collection efficiencies vary between 82% and 97%. There are also high temperature resistant types used in circulation air filtration in drying ovens and paint booths. Filter class varies between G3-F5 according to EN 779.