Cabin Air Filters are fitted to up-market production cars. There are three ways in which the filter works. The first is by mechanically filtering out solid particles through fine pores in the non-woven fabric. The second is by imparting an electrostatic charge to the fibre, which then attracts solid particles electrostatically. The third mechanism is by the use of activated carbon, which adsorbs gases and also capable of removing odours. This is a passenger compartment filter medium installed in the dust system to filter out pollen and dust particles, which enter the interior of the vehicle. Cabin air filters have the ability to remove up to 95 percent of all particles that are 3 microns or larger. The cabin air filter is generally located at the fresh air intake under the hood or under the dash on the passenger side of the vehicle.