Selection of air filter for central air conditioning
The service life of the HEPA filter at the end of the clean room should be 5~15 years, and the most important factor affecting the service life is the advantages and disadvantages of the prefilter.
In general, the last level of central air conditioning air filter determines the level of air purification, at the upstream of the filter only play a protective role, it protects the downwind end of the filter so as to prolong their service life, or the protection of the air conditioning system in order to ensure their normal work.
In the design of air conditioning, should first clean according to the requirements of users to determine the efficiency of the last stage of central air conditioning air filter and select protective filters, if the filters also need protection, an additional filter in its upper end.
The efficiency of air filters for central air conditioners should be well matched. If the efficiency of the two adjacent filter specifications are too large, then the first level can not play a role after the protection; if the difference between the two levels is not large, the latter level is too small.
