Even people with allergies can breathe easy – the role of the passenger compartment filters is to absorb impurities in the air and remove pollutants from the outside air entering the passenger compartment. This enhances the efficiency of the air conditioning system. Among passenger compartment filters, a distinction is made between dust and pollen filters and combined activated carbon filters.
The dust and pollen filter consists of a prefilter for trapping coarse particles and a microfibre layer for trapping particles that can get into the lungs.
The filter consists of three layers. The first layer is the prefilter for filtering out coarse particles from the air. The second layer is a microfibre layer. It removes from the air the tiny particles that can get into the lungs. The third layer, which is separated off from the first two protective layers, is the activated carbon layer. It subsequently filters out unpleasant gases and odours better.
The larger the filter area, the better. This requires an ingenious folding technique to be deployed. For daily use, it is also essential that the filter has a high degree of resistance (to high/low temperatures, humidity and chemicals such as road salt, etc.). This will also ensure a long service life.