If there is no air conditioning filter filter, but these particles into the compartment, not only make the car air conditioning pollution, cooling system performance is reduced, and the human body after inhaling dust and harmful gases make people have allergic reaction, lung damage, by ozone stimulation and mood irritable, and the impact of smell, all affect driving safety. And high quality air filter can absorb powder tip particles, reduce respiratory pain, reduce the irritation of allergic people, driving more comfortable, air conditioning cooling system is also protected. Please note that there are two kinds of air conditioning filter, one is no active carbon, the other is containing active carbon (consult clear before purchase), air conditioning filter containing active carbon not only has the above functions, but also absorb a lot of odor and other effects. The general replacement cycle of air conditioning filter element is 10,000 kilometers.