How can I tell if it's time to change my HEPA filter?

How to determine whether the high-efficiency air filter should be replaced? I think this question is a lot of people are more confused, the next small to answer a simple.

　　Here, we should say, not the more expensive product is better, of course, it is for the product sales market disorganization, then how to identify the product is not to be removed and replaced? We should go from the following content to determine:

　　1, first of all, we have to observe, carefully observe the high-efficiency air filter itself, is not a light color, or gray-black, if the product is obviously black, then this time, the filter should be removed and replaced.

　　2, the same must we go to carefully observe, usually about to damage the filter is the condition of the air, if we find this situation, then we must dismantle the replacement.

　　3, the third point is attributed to maintenance, if we find that the product has a lot of dust around, then this time we must clean up the following, if cleaned up after the filter is not very effective, then it is necessary to dismantle the replacement.

　　The product in the application of a period of time, is to be cleaned up, on the one hand is to ensure that the application of good results, on the other hand, in order to avoid suction of harmful substances on the natural environment constitute a second damage. In the cleanup what is important to clean up, what in the cleanup process is to pay attention to, for different conditions, it must constitute enough attention.

　　I will say that is should be cleaned when the main performance of high-efficiency air filters, usually in the company's cleanup, can use high-pressure gas machine to scrape away the surface layer of dust. If it is particularly dusty conditions, you can apply the hand-washing method, soak it in water for ten minutes after the detergent diluted in water, after cleaning, and then the water to drain, and lay flat for drying can be.