Viledon Filter is a filter media commonly used in AHU filters, either as a pre filter or installed in the filter medium section. Viledon air filters that are sold in the market are usually sold in roll units, where one roll has a size of 2 x 20 meters with a thickness or thickness that varies, ranging from 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, to 30 mm. Viledon filters are usually used in ac central or AHU units in commercial buildings such as malls, plazas, hotels, hospitals, offices, factories and others.