Dust, soot, rubber particles, abrasive substances, ozone, nitrogen oxides, sulfur and carbon dioxide, benzene, and plant pollen in spring and summer enter the car through the vents with the air. Due to the enclosed space, the concentration of these substances inside the cabin can be several times higher than outside. Inhaling polluted air can tire the lungs and cause allergic reactions. The cabin filter (or pollen filter) is designed to solve this problem. Here is our advice for choosing a high-quality filter suitable for your car.
Why it is important to replace this part in due time
A pollen filter is a consumable part, so it must be replaced regularly. It is recommended to change it at least once a year or every 15,000 km. If you live in a big city and are often stuck in traffic jams or, conversely, if you drive on dusty country roads most of the time, you may need to replace it more often.
A dirty filter can reduce the efficiency of the air conditioning, heating, and ventilation systems, as the filter’s resistance to airflow increases due to dirt buildup. Windows fog up heavily in rainy weather, and over time, pathogenic bacteria and fungi begin to grow on the surface of the filter element.
Sometimes the filter element deforms, and the airflow bypasses it, allowing all contaminants to enter the cabin.
The different types of cabin filter
Nowadays, the following types are popular:
- Conventional barrier filter. These are dust traps. They are made of special paper or synthetic fibers. They usually consist of several layers. Each is designed to trap particles of a certain size. It is worth noting that using synthetic fibers as the filtering material is preferable because they can ensure effective cleaning without offering resistance to airflow. In high-quality filters, one of the layers may use an electrostatic charge that allows its fibers to capture even the smallest dust particles.
- With absorbent layers. Each of these layers has a textile base with activated carbon granules up to 0.5 mm. The granules have a porous surface that absorbs molecules of toxic substances that enter the car through the air. Such filters are more expensive but guarantee finer cleaning. Additionally, they neutralize unpleasant odors.
- With an antibacterial layer. This layer is made of a bactericidal material, usually polyphenol. It binds and neutralizes bacteria and allergens and inhibits mold growth by several dozen times. These parts are the most expensive as they guarantee maximum protection.
4 tips from AUTODOC on choosing and using cabin filters
- Choose products from reputable manufacturers. We recommend Mann-Filter, Bosch, Mahle Original, Stark Automotive, Knecht, K&N, and Ridex. In low-quality items, less material is used for the filter layers, which results in better air purification. Poor-quality products may even have a fake carbon filter that is actually just a conventional dust filter with one of its layers painted black.
- Check the condition of the pollen filter if you notice any of the following:
- an unpleasant smell inside the car;
- it is cold in the car even when the heater is on or hot when the air conditioning is activated;
- dust starts to accumulate on the dashboard.
- Choose the replacement part in strict accordance with your vehicle’s specifications. It is impossible to install components larger than necessary. Parts smaller than standard ones allow unfiltered air to enter the cabin.
- When installing the filter, make sure to position it correctly. The airflow direction should be marked on the side of the part, which is particularly important for carbon and anti-allergy filters.
Conclusion
The pollen filter does not directly affect the operation of the car’s basic systems and assemblies, such as the engine or transmission. For this reason, some car owners do not bother to replace it in a timely manner. This can be dangerous for your health. High-quality components are capable of trapping up to 99% of dust and allergens. That is why you should not skimp on this part. By following our simple tips, you will ensure a comfortable and safe car environment for a long time.