The air filter replacement is mainly used to purify the intake air and remove the dust particles. In addition, the exhaust gas of some production processes contains fine pollutants (such as radioactive substances, oil mist, etc.) although this type of purification belongs to exhaust gas purification, due to its high purification requirements, an air filter is also required. The characteristics of air purification are low dust concentration and fine dust particles in the treated air, and the required purification efficiency is high. http://www.jinmifilter.com/air-filter-replacement/