Also known as fine filters or 5 micron 3 micron filters, & are suitable for both EU-5 and EU-6 operations.Superior quality non-woven synthetic filter media with regular labyrinthine structure being built of synthetic fibres, which are bonded together by a special resin. This media is sandwiched between two layers of HDPE mesh, which acts as a retainer.These filters can be directly installed in AHUs or mounted in banks in separate single skin plenums.