A baghouse, bag filter or fabric filter is an air pollution control device that removes particulates out of air or gas released from commercial processes or combustion for electricity generation. 

Power plants, steel mills, pharmaceutical producers, food manufacturers, chemical producers and other industrial companies often use baghouses to control emission of air pollutants. The filter materials used are woven or non-woven fabrics made from natural or man-made fibres as well as inorganic fibres (glass, mineral).