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How often do HEPA filters need to be replaced?
How often do HEPA filters need to be replaced?The replacement cycle of the HEPA filter is not fixed and will be affected by a variety of factors, generally between 6 months and 3 years, the following is a specific introduction:According to different use environments and device type General clean room: Under normal use, the service life of HEPA filters is usually about 1-2 years. If the front-end primary effect filter is well maintained, its life can be extended to more than 2 years. Adhesive electronic purification workshop: Due to the high cleanliness requirements and the production process that may produce more pollutants, HEPA filters are generally recommended to be replaced once a year. Cosmetic clean workshop: If the air quality requirements in the workshop are high, or the HEPA filter is used frequently, it is recommended to replace it once every 6 months to 1 year to ensure that the air quality is up to standard. Dust-free workshop: under normal use and proper front-end maintenance, the life of the HEPA filter can exceed 1 year, or even up to 2 years. In clean areas with harsh environments and frequent use, the replacement cycle will be relatively short. Ultra-clean table: The HEPA filter of the ultra-clean table is generally replaced once every 1-2 years. According to different monitoring and evaluation methods Pressure difference monitoring: When the pressure difference of the high-efficiency filter increases to a certain extent, such as reaching 2-3 times the initial resistance, it should be considered replaced. It is one of the more common and accurate methods to determine the replacement time through the prompt of the differential pressure meter. Wind speed detection: If it is detected that the wind speed in the operating area of the clean workbench or purification booth is significantly reduced, and the influence of other factors such as the fan is excluded, it may be caused by the blockage of the high-efficiency filter, and the filter needs to be replaced at this time. Appearance and performance inspection: regularly check the appearance of the filter, if it is found that there is obvious damage, rupture, pollution or deformation, or indoor air quality decline, odor, dust, and other problems, and other factors have been eliminated, should also be replaced in time. |
