Cabin filters, also known as heater filters or interior filters, are very important and sensitive components used in modern vehicles. Their importance comes from their direct connection to human health.

In older cars, air entered the cabin through special ducts. At that time, there was no air filtering element, so dust and pollution directly entered the car cabin, putting the passengers’ lungs at high risk.

To solve this problem, a filter called the cabin filter was added to vehicles. This product is placed in the path of the air entering the car cabin and works similarly to an air filter. However, there are some differences in its design, as highlighted below:

1. Cabin air filters must use special adhesives (free of harmful industrial substances for the human respiratory system), and resin adhesives must be strictly avoided. If low-quality adhesives or resin enter the vehicle’s ventilation system, they can severely endanger the occupants’ health.
2. The filter paper in cabin filters can be antibacterial and include activated carbon (to neutralize bad odors), whereas engine air filters do not require these features.

What Happens if the Cabin Filter Does Not Work Properly?

If the filter size does not match the cabin filter housing (too small or too large), or if the filter paper cannot perform effective filtration, dust and suspended particles can bypass the filter and enter the car’s ventilation system. Over time, this causes clogging of the ventilation blades, reducing the efficiency and airflow of the cabin system. Moreover, the accumulation of dust and particles can compromise passenger health.

Types of Cabin Filters

• Standard Cabin Filter:

This type of cabin filter prevents dust and suspended particles in the air from entering the car’s interior.

• Activated Carbon Cabin Filter:

These filters have an additional carbon layer compared to standard filters. Besides performing the normal functions of a cabin filter, they block unpleasant odors from entering the cabin and absorb harmful gases such as nitrogen oxides, sulfur dioxide, and ozone.

• Biofunctional Cabin Filter:

These filters, in addition to the functions of the previous two types, include a special layer that prevents allergens and microbes from entering the cabin to a high degree.

Advantages of Biofunctional Filters:

1. Capture up to 99% of allergens.
2. Reduce mold and bacteria growth by more than 98%.
3. Almost completely block fine particles as small as 2.5µm.