Industrial AHU Filters We also meet the requirement of replacement AHU Filters which are widely used for filtering the air and thus, ensure clean air for healthy breathing. Our assortment of AHU Filters is used for proper ventilation & suctions of AHUs installed at hospitals, hotels, malls and other such establishments.Salient Features:Pre -Filter:Efficiency: 90% down to 5 to 25Media: Non-woven synthetic that is washable with soap, water, or solventInitial pressure drop: 2.5mm WG or as per requirementFine Filter:Efficiency: 99.9% down to 1 to 5Media: Non-woven synthetic (cleaned by dry air)Initial pressure drop: 6.5mm WG or as per requirement