Allergies and asthma can be greatly affected with a blocked pollen filter. Other dangers include carbon particulates, exhaust emissions, industrial dust and fungal spores which can settle in the air passages of a vehicle.
Air conditioning pipework can become blocked. This, combined with heat from the engine can help bacteria and mould spores to grow in the system. If the filter is blocked this can lead to condensation on the windows in winter.
Having the air conditioning and pollen filter checked by Phil Gilbert Toyota can help to prevent these problems and maintain the system.