The metal mesh washable primary filter for air conditioning system is made of high-quality nylon mesh and a metal frame, which can also be covered with PU. The thickness of this kind is usually 5mm or 8mm. The metal frame and PU effectively enhance the structural stability of the filter, ensuring that it can effectively filter airborne particles such as dust and pollen. This flexibility and enhanced construction make the central air conditioning system's primary filter ideal for delivering fresh air and gaining long-term stable system operation.

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