Optech manufacture and supply primary filters ( Pre filters ) and Secondary Filters ( Fine filters ) for all air handling systems. We supply our filters to various type of ventilation systems used in Power generators, Turbine air intake systems, all clean rooms and general ventilation air handling units. Our pre and fine are manufactured from polyester High loft , high strength , thermal bonded media supported with both side HDPE mesh or One side HDPE mesh and other side Aluminium expanded mesh which are used for rigidity and suitable for washing. Since the filter media is manufactured in multy layer progressive density fibers, it offers higher dust holding capacity which offers longer service life.