Filters 33 www.aftermarketonline.net FEBRUARY 2026 Clogged filters can restrict airflow, potentially damaging components Clean air tech choices a breath of fresh air motorists will thank workshops for Regularly replacing the cabin air filter is a simple, but effective way to improve air quality inside a vehicle, as well as to extend the life of its air conditioning system DENSO, a world leader in AC and thermal management technology, is keen to help owners and professional technicians understand the key issues, by clearly explaining how the system works and what can go wrong. Unfiltered air, particularly when driving in a city or heavy traffic, can contain harmful particulate matter. This can not only affect the health of the occupants, but also have a heavy, negative impact of the efficiency of the vehicle’s AC system. The vehicle’s entire heating and ventilation system is designed to operate with a clean and unrestricted air flow, which is what a new DENSO cabin air filter provides. Without this, particulate matter naturally suspended in the air outside the vehicle would be drawn through the system and stick to the leading edges of the fan and the surfaces within the unit, which affects system performance. However, even if the vehicle is fitted with an OE-quality cabin air filter, it will over time become less effective due to the quantity of dirt it stops and collects. Just like a vacuum cleaner bag needs to be regularly emptied and the filter cleaned, the cabin air filter will need replacing every 10-15,000 km, annually or at the very least, in line with vehicle manufacturer service schedules. A clogged or dirty cabin air filter can restrict airflow, causing a drop in air pressure, which will make the AC system work harder — potentially damaging its internal components and reducing cooling efficiency, increasing energy consumption and causing premature wear. In line with ongoing product innovation, DENSO offers two highly effective — particle and combination — designs. The new ClearAir+ cabin air filter utilises five active layers that incorporate the latest developments in filtration technology. Through the ultra-efficient removal of pollutants, ClearAir+ filters ensure the cabin is free of airborne pollution. It helps prevent dust, pollen, and debris from reaching the evaporator core. When the AC system runs efficiently, it puts less strain on the engine, which can help reduce fuel consumption and lower exhaust emissions. Regularly replacing the cabin air filter also reduces the workload on the blower motor and other AC components. This represents a great opportunity for workshops to offer customers a superior cabin air filter solution. Visit https://www.denso-am.eu/ products/filtration for details.
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