It is common to find Air Cleaner Filters in cars and rooms in needing recycling of air. These cleaning devices are used to purify and clean the air. The most popular use of air cleaner filters is to purify the air of solid harmful particles. Examples of these particles would include harmful microbes such as bacteria as well as dust and pollen mould. With particles like these removed the air is made cleans and fresh.

Air filter cleaners are very important in gas turbine engines as using clean air will notably increase the efficiency of the engines.

There are many methods which are used by air cleaner filters to remove unwanted particles from the air. The most common method is to use fiber elements in the air cleaner filter to which the dust and other particulate matter will stick to thereby cleaning the air.

There are other complex methods like the static electric charge method. In this method the air cleaner filters use static electricity to attract dust and other particles thereby filtering out clean air. Oil bath filters were used earlier but now due to sophistication in technology these have fallen out of favor.

There have continued to be advancements in the air cleaner filter industry brought about by advances in fluid science. With modern air cleaner filters air conditions and gas turbines work efficiently promoting healthy human health. Some popular air filter materials include cotton filters and paper foam filters. Air filters have to be cleaned and changed regularly and periodically to get optimum performance.

There is much research done on the flammability of the air filters. These air filters are classified into class one and class two types based on their flammability. The class 1 filters do not become fuel when they are exposed to flame. This means they produce only negligible amount of smoke when they are burnt. The class 2 filters however become ready fuel when exposed to the flame. These produce moderate amounts of smoke while burning.

Air filter come in shapes and sizes matching the air flow area. As they work to clean the air they easily get clogged with dirt from the air. They thus need regular cleaning and changing. This clogging reduces the efficiency of the air filters, causes impure air to pas through and reduces air flow.

In an engine such a clogging would cause a drop in performance. Applications of air filters are wide and varied. Common applications of air cleaner filters include air conditioners for rooms and cars, internal combustion engines and gas turbines.

Paper is one of the most common materials that are used for air cleaner filters in automobiles. This is mainly because they are cost effective as well as efficient. Also these are easily replaceable. Oil wetted foam elements are also known to be used as air filters in automobiles. Foam was a known choice for air cleaners in many applications before the improvement in air cleaning technology.