⑴The filter area mentioned here is the area of the filter material of the filter. The filter area of a filter is often several times, dozens of times, or even hundreds of times the windward area of the filter.

⑵The larger the filter area, the lower the airflow velocity through the filter material, the smaller the resistance of the filter, and the more dust it can hold. Therefore, increasing the filter area is the most effective method to prolong the service life of the filter.

⑶Experience has shown that for filters of the same structure and same filter material, when the final resistance is determined and the filtration area increases by 50%, the service life of the filter will increase by 70-80%. When the filtration area doubles, the service life of the filter will be three times that of the original.

⑷The size of the filter area has little effect on the filter efficiency.

⑸For end users, it is definitely cost-effective to choose a filter with a large filtration area.