What Is a Microfilter Used for in a Car?

by Michael Signal

A microfilter, also known as the cabin air filter, is completely separate and different from the engine air filter, though they basically serve the same purpose. Whereas the engine air filter cleans the air for your engine to "breathe" more easily, the microfilter cleans cabin air so that the passengers can breathe more easily.

Operation

Clogged microfilters lead to poor ventilation.

The microfilter is placed within the heating, ventilation and air conditioning (HVAC) system. Air cannot enter through the car's air vents without passing through the microfilter. The paper filter traps contaminants, often with the help of an electrostatic charge or activated charcoal.

Location

The microfilter is usually easy to locate. It is usually readily accessible through or under the dashboard, behind a panel. It is also often located just under the upper portion of the dashboard and accessible through the engine compartment.

Other Benefits

In addition to creating a cleaner breathing environment for passengers, microfilters can also increase the life and reliability of electrical components because the filters limit the dust and debris that could harm delicate electronics.

About the Author

Michael Signal began writing professionally in 2010, with his work appearing on eHow. He has expert knowledge in aviation, computer hardware and software, elementary education and interpersonal communication. He has been an aircraft mechanic, business-to-business salesman and teacher. He holds a master's degree in education from Lesley University.

Photo Credits

  • photo_camera The automobile filter for air clearing image by Dzmitry Halavach from Fotolia.com