Used for general ventilation Our AZL are used in general ventilation system and efficiently grades of the filters include,F6,F7,F8,F9 and F10,equivalent to Chinese classification of“medium”,”high-medium” and European EU6-EU10. Main characteristic* Large effective filtering area ; low resistance ; long service life* Materials of AZL/1 filters are 100% inflammable and the product is environment-friendly * Small in size and suitable for compact central airconditioning systems aAZL/1 filters use super-thin polypropylene material as filtering media . all materials of AZL/1 filters are in flammable and this is beneficial to environmental protection and rubbish treatment . this material is not easily broken and price of filters is also relative low . AZL/...