1. W-shaped structure provides larger ventilation area and smaller negative pressure
2. Modular structure facilitates installation
3. The pressing rod structure makes it convenient to disassemble and has good sealing effect
4. Can be washed with water
5. Can realize filtering at different heights
1. U-shaped corridor structure increases the filtration area and reduces the negative pressure
2. Easy to disassemble and replace
3. Firm frame structure
1. Shell splicing structure provides good sealing effect
2. Lightweight design meets the field installation conditions to the greatest extent
3. Simple structure, simple and quick to install on site
4. There are two installation options: installation of four primary filters or installation of four primary filters and four sub-high efficiency filters at the same time
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