Air filters and scrubbers play an important role in health and safety control in new industries. If dust or other hazardous particulate matter generated by industries is released and diffused in the air, it can easily travel to different parts of the building and colonize on walls, ducts, clothing, or furniture and contaminate clean areas. If released externally (e.g., via a smokestack) they can travel to distant geographic regions, spreading air pollution [Page 13]far from the original source. Air filters and scrubbers can help remove the hazardous particles from the air and bring the level of these particles in the air to a safe level, continuously cleaning the air and providing a clean, healthy, and productive environment. Air filters also are used in the home ...