1 Primary air filter should not use oil-soaked type

2 The medium efficiency filters should be installed in the purification section of an air conditioning system

3 HEPA filter or sub-HEPA filter should be set at the end of the cleaning chamber

4 Medium, sub-HEPA and HEPA air filters should be chosen as per the rated air flow

5. Resistance and similar filters should be installed in the same clean workshop

6 For the HEPA filters,they should be installed by convenient, easy to check and replace