Polluted air from the ventilation system.
Allergic reactions, asthma attacks and headaches: if the cabin air filter fails or is of poor quality, vehicle occupants don’t have much to smile about.
Cabin air filters ensure that drivers and passengers breathe in as few pollutants as possible from the outside air. And depending on where you happen to be, the levels of these can be very high. The air that flows into the vehicle through the ventilation ducts during driving, which can be as much as 540,000 litres per hour, contains around five times more exhaust gases, pollutants and allergens than the air by the side of the road. The sole and, therefore, the most important barrier between this cloud of pollutants and the occupants of the vehicle is the cabin air filter in the ventilation system.