The life cycle of air filters depends not only on their own advantages and disadvantages, such as: filtration system, total area of consideration, overall design, original friction resistance, etc., but also related to the value of the concentration of fumes and dust in the air, the detailed application of the exhaust volume, the final friction resistance of the setting and other elements.

Air filter is the pivotal equipment of the air purification system system software, the filter produces friction resistance to the gas, along with the promotion of the filter accumulation of dust, the filter friction resistance may also follow the expansion.

When the air filter accumulates too much dust, the friction resistance is too high, it may make the air filter reduce according to the air discharge, or the air filter sector is through, therefore, when the friction resistance of the filter device expands to a certain value, the filter device will be destroyed. Therefore, it is important to use the air filter at the appropriate cycle time. If the air filter is not destroyed, the friction resistance is generally used to determine the service life.