Fiber filter grilles are used as suction grilles in ventilation systems. They retain the undesired particles that are present in the extracted air. Also they prevent the particles to be accumulated in the duct and harm the devices. They are used in surgery rooms, clean rooms and in the hygienic ambiances in textile industry. Pore structure is in accordance to DIN 4185 standard requested for textile products. Also, filter section can be easily cleaned up by demounting due to its cover openable with bolt.