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About Air Filters

4/16/2013 2:44:02 PM | by Anonymous

Filters: Air

An air filter is known as a device which prevents solid particulates such as dirt, dust, mold etc., from entering the air inlet of an internal combustion engine. The quality of air we breathe in daily is very essential to our health. Often times, pollution which comes in the form of dust, particulates, bacteria, pollen, and mold from air accumulate a huge amount that they enter the lungs and cause damage to the respiratory system. Thus, air filters is a device which removes such contaminants from air that passes through it. Air filters are commonly found in ventilation systems and in engines. Some types of engines include gas compressors, gas turbines, diving air compressors and internal combustion engines. Man-made structures such as satellites and space shuttles as well as buildings and aircrafts use mechanical air filters and they consist of cotton, foam, paper and synthetics.


Air filters are known to be very efficient in removing pollutants from air so much so that the United States Environmental Protection Agency and the American Lung Agency have endorsed the use of filters for people who are suffering from asthma and allergies. As mentioned previously, mechanical air filters is one such type of air filter. This filter works by moving air toward a unique screen which removes pollen, dust mites and allergens. Such air filter is even capable of screening tobacco smoke.


Another type of air filter is known as the electronic filter. This filter makes use of electrical charges to trap and absorb irritants and allergens. On the other hand, a type of air filter that has elements of both, mechanical and electrostatic filters is known as the hybrid filter. A gas-phase filter is functioned to trap non-particulate pollution such as gases from building materials, paint and perfume. Smoking gas can also be removed by gas-phase filters. The inability to remove allergens is one drawback to a gas-phase filter.


To determine which type of air filter is best suited for your usage, you must be sure of what you need to utilize the filter for. In choosing the correct air filter, one must consider the area in where the filter would be installed. Generally, these are the following features to consider before purchasing such air filters: Size, Cost, Layers of filtration, square footage covered, ease of filter removal, noise level, frequency of cleaning and efficiency for both large and small particles.


Heating and air-conditioning systems are kept clean by the use of air filters. Air filters ought to be built right into the air handling system if your house is either air-conditioned or heated. A system which manages to cover the whole house at the same time can be space-efficient. It could also reduce the noise-level in a house.


Residential air filters should have a Minimum Efficiency Reporting Value (or MERV) of 1-12. MERV ratings are indicative of the size of the particles the filter is able to remove from the air passing through it. This is the standard rating for residential filters. Generally, a filter which comes with a rating of 8 is able to trap 70-85 percent of air-borne particles it encounters. A rating of 11 or higher means that the air which passes through the filter is 95 percent cleaner when it gets released from the filter than it was when it went into it. Filters must be cleaned on a regular basis. Filters are normally changed monthly. However, one could purchase a filter that lasts up to three months. The efficiency of particles it catches increases once the filters get dirty. This is because the buildup of the fibers reduces the openings the air passes through and allows the air filter to trap more particles.

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