The air conditioning filter is usually replaced every 2-3 months and every six months, so the service life of the air conditioning filter can generally be more than 2 years; But in order to protect the use of high-level filters in the later stage and ensure the safe operation of the clean room, many smart homeowners replace the initial efficiency every month, replace the medium efficiency and sub high efficiency every 3 months (or use high efficiency as a protective filter in the last section of the wind cabinet as mentioned earlier), which can ensure the service life of the high-efficiency filter for more than 5 years (or even 10 years). Moreover, because the resistance of the new filter after replacement is small, the air conditioning load is greatly reduced, and the cost of replacing the filter is far less than the electricity cost required for air conditioning operation. Frequent replacement of the pre filter in the previous stage actually allows the air conditioning to operate under low resistance load, saving a lot of electricity costs;

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