How often do the filters change at all levels?
For the replacement frequency of the filter at all levels, the following recommendations:
1, the initial effect of the filter is generally 4-8 weeks replacement time;
2, the efficiency of the filter is generally 7-9 weeks to replace a;
3, sub-efficient filter is generally 5-6 months replacement time;
4, high efficiency filter is generally 1-2 years replacement time;
5, ultra-efficient filters generally clean room cleanliness to determine the replacement frequency.
The above recommendations are for general reference only. The actual replacement frequency of the filter depends on the environment, cleaning requirements, monitoring status, test conditions and cost considerations.