Air filters are devices designed to remove solid particulates and molecular contaminants for the purpose of improving air quality in a system or environment. Air filters typically consist of a sturdy frame, filled with some type of filter media, which is sealed to prevent leaks between the frame and media. Some filters may also have a faceguard — a screen attached to the filter to protect the media during handling — and/or a gasket to prevent leaks between the filter frame and its housing.
Air filters can be used in any application requiring the use of clean air. Devices and locations that use air filters include air conditioners, industrial and commercial buildings, hospitals, pharma manufacturing, electronics manufacturing, and food processing equipment.