The filters are made of different materials, including fiberglass, polyester and cotton. The type of material affects how effectively the oven filters the air. This is the most common type and material used for almost all factory production cars. The “paper” used is a little different from the material you put in your printer (does anyone still use them?) - it is a very compacted wood pulp that is joined together to make a much stronger material, which is then folded into an accordion shape to give more surface area and is joined to a rectangle of foam.
It is cheap and efficient, which is why the use of this type of filter is so widespread. However, over time, dirt will begin to clog in the folds of the material, which will restrict air flow. With that in mind, it will eventually have to be placed in the trash can to get a new one. The exact time you change it will vary depending on driving conditions, but you can usually expect a paper filter to last about one to two years or between 10,000 and 20,000 miles.
Probably the first port of call for most people who change their standard filter is a cotton-based part. They feature layers of cotton gauze sandwiched between an aluminum mesh, which provides a less dense material for air to penetrate than paper. Since it is not as dense, it should theoretically be less restrictive, allow more air to enter and increase power. However, any bump in the start is likely to be small; a possible change in induction noise will be the only noticeable change in the driving experience.
Cotton air filters can last the life of the car, although they need to be cleaned and re-greased once they are sufficiently dirty. You should ensure that you do not over-lubricate the filter, as this can cause oil to enter the mass flow sensor. Foam air filters are even less restrictive, using multiple layers of foam with different densities to stop contaminants, plus a wire mesh to help maintain the filter's shape. The downside, again, is that there are fewer restrictions, which means it won't be as effective a filter, but under most conditions, this is unlikely to cause a problem for your engine.
As with cotton filters, many use an oil application to trap incoming dirt. Also like cotton filters, it's possible to purchase one as a flat “panel filter” that fits inside your existing airbox. Metal filters, made of stainless steel mesh layers, often look great and do not need to be greased. In addition, with larger gaps between filter material, a metal filter will be less restrictive than cotton and foam designs.
However, once again, with fewer restrictions, comes less filtration. This design will naturally let more dirt through, although the particles are not likely to be large enough to cause problems. The engine or cabin air filter that comes with your car is most likely a paper filter. Since the filter needs to be changed every 12,000 to 30,000 miles, it's made to be as affordable as possible.
Woven wood pulp provides good airflow while reducing the amount of dust and debris that can enter the engine and wrinkle construction sites. Automatic paper filters are relatively inexpensive and are made to be disposed of after each use. Finally, you can find a foam filter or filter wrap in the automotive filter replacement section of your local parts store. This is the least popular type of filter, as foam does not offer the same trapping capacity as paper and can restrict airflow.
Foam is also the least environmentally friendly type of element. You'll often find foam filters on farm and lawn equipment. In many of these applications, the foam part is coated with a special oil that increases the filter's ability to remove debris. If you live in a very dusty area, your service center may suggest adding a foam filter wrap to your standard paper filter to help reduce the amount of debris in the engine.
Ultimately, most drivers looking to take care of their daily driver will be satisfied with the cost and performance of a paper air filter. To improve long-distance performance or for extreme conditions, you may want to invest in a reusable foam or cotton air filter replacement. Air filter material, or media, is the filter component used in air filters. The type of air filter material used depends on the application.
There are many different types of air filter materials that can be selected; each designed to capture different types of recirculated particles. Permatron manufactures air filters with a wide range of air filter materials. Charcoal air filters are commonly used in air purifiers, range hoods (along with aluminum screens), bathroom fans, and microwaves. They also have lower efficiency due to their larger open pores and have less filter material that throttles particles.
Fiberglass air filters provide better airflow in HVAC units and are suitable for capturing only large particles. Dust holding capacity is the average weight of dust that an air cleaner can hold when loaded with synthetic dust incrementally under specified test conditions. The first and simplest engine air filters were made of paper, and some still are, but you can also get filters made of premium cotton, synthetic foam, and cotton soaked in oils that trap even more contaminants. Air filters are found in many homes, offices, retail spaces, laboratories, clinics, and hospitals.
Therefore, they are commonly used in conjunction with HEPA and electrostatic air filters to improve air quality. Activated carbon air filters are effective in removing gaseous pollutants, fumes, vapors and odors present in the air. Air compressor filters, or air filters, are installed on condensed overhead lines, which are used to remove water, solid particles, oil, and other contaminants in a multi-stage filtration process. Early cars did not have air filters in the engine, automotive pioneers quickly discovered that debris entered the engines, damaging performance and shortening life.
Because they are so easy to replace, engine air filters are an excellent maintenance item for a beginner DIYer. . .