The cabin filter began to be used not so long ago (it first appeared on a production car in 1991). It is needed to clean the incoming air from contaminants that enter the interior.
If we compare the amount of pollution on the road and on the sidewalk, then their concentration on the roadway is simply enormous. To prevent drivers and passengers from breathing these toxic substances, they began to use a filter to clean the air in the cabin.
It protects not only from the exhaust of other cars but also from poplar fluff, pollen, and various dust that gets into the cabin. Also copes with odors from products from which winter washer fluids are made.
If you breathe for a long time in non-freezing vapors with a high content of harmful substances, you will experience headaches, irritation of the respiratory system, and sensitivity of the eyes. A particularly high concentration of chemicals occurs for the first time in 5 seconds when an anti-freeze liquid is applied to the glass.
A cabin filter containing activated carbon reduces the concentration of isopropanol by several times. For example, a conventional dust filter element performs worse at this task. But even the best carbon filter does not completely “kill” all harmful substances from “frost freeze.” So, it is recommended to use it only on the move or to pre-enable recirculation.
NO2 or nitrogen dioxide is also a hazard to the driver and passengers. When a small amount is inhaled, airway resistance increases – even healthy people will find it harder to breathe. A quality carbon-filled cabin filter reduces its concentration by 25-100 times.
They also cut by half the concentration of CH hydrocarbons, which, together with nitrogen dioxide, make up the basis of urban smog.
Why A Carbon Filter is Better
Micropores of activated carbon adsorb large molecules of toxic gases from the air: nitrogen dioxide, light hydrocarbons (methane, propane, butane), aromatic hydrocarbons, and alcohol vapors (both methyl and isopropyl). If the question is which one is better to buy, you need to take coal.
Activated carbon is not a marketing hoax, but a working thing when it comes to quality filters from well-known companies.
Yes, it does not capture carbon monoxide and other harmful substances with small molecules. But to combat them, many modern cars have air quality sensors that automatically control the recirculation flap.
A simple air conditioning system does not reduce the pollutants in the cabin. They only create a false illusion of safety: only the temperature and humidity of the air are comfortable, and the concentration of harmful substances inside is higher than outside!
To combat toxic gases, you need to use a special system that automatically switches the air intake to recirculation mode.
When to Change the Cabin Filter
There should be no exact date for replacement. The service life does not depend on the kilometers traveled, but on how often the “stove” and air conditioning system works, as well as on the place where the machine is used.
For example, in large cities with a large number of cars, it is recommended to change the cabin filter element once a year. It must be remembered that the activated carbon inside the filter works only when air flows through it. If there is no air, then it does not work – its resource is not reduced.
Pay attention to the weight – the heavier it is, the more activated carbon inside, which means it will have a longer service life.
By the way, the resource of the “heater” fan motor can be extended by removing and vacuuming the filter twice a year. In autumn after the end of leaf fall and in summer after the season of poplar fluff with pollen. This will slightly lower its resistance.