VPM Engineers offers Bag House Filter Made of Special Fibers. VPM Engineers is the manufacturer of turnkey solutions for air pollution control equipment which are essential for all the solid fuel burning boilers. Bag House Filter Made of Special Fibers is made of special fibres, used to eliminate intermediate and large particles greater than 20 microns in diameter]. Bag House Filter Made of Special Fibers operates like the bag of an electric vacuum cleaner entrapping the solid particles on the surface of the fabric. With a wide range of available fabric filter media the baghouse can be easily adapted to various operating conditions.