This cylindrical filter is made of primary filter sponge, which meets the requirements of the US Safety Standards Organization (UL). UL certification ensures the reliability of products in terms of fire accident and electrical safety. It is suitable for the front air filtration of the filter section that requires fire protection. The low resistance of the cartridge helps to ensure the free flow of air during the filtration process, thereby reducing the burden on the system and energy consumption. The design of the filter cartridge increases the filtration area and is also more and more popular.

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