How long does the primary filter change?

1, according to the cleanliness of the environment, regular (early effect filter is generally 1 to 6 months) replacement.
2, on a regular basis (usually once every two months) with a dust particle counter to measure the cleanliness of the product with the cleanliness of the cleanliness of the region, when the measured cleanliness and cleanliness requirements do not match, you should identify the reasons (whether there is leakage , High efficiency if there is failure, etc.) If the high efficiency filter has failed, you should replace the new high efficiency filter, and the best early effect filter replacement.
3, the replacement of the initial effect of the filter should be shut down.