{"id":1319,"date":"2025-08-21T17:30:23","date_gmt":"2025-08-21T09:30:23","guid":{"rendered":"https:\/\/szfengheng.com\/?post_type=product&p=1319"},"modified":"2026-06-15T15:16:56","modified_gmt":"2026-06-15T07:16:56","slug":"ventilation-fan-filters","status":"publish","type":"product","link":"https:\/\/szfengheng.com\/ko\/product\/ventilation-fan-filters\/","title":{"rendered":"25mm 30mm 40mm 50mm 60mm 70mm 80mm 90mm 120mm 172mm 200mm 220mm Ventilation Fan Filters"},"content":{"rendered":"

This fan louver is specifically designed for cooling fans, cabinet vents, duct fans, and other applications. It’s a functional panel that integrates protection, dust prevention, backflow prevention, and aesthetics. Utilizing a self-closing gravity structure or optional electric actuator, the louvers automatically open under the pressure of airflow when the fan is running, achieving efficient ventilation. After the fan stops, the louvers automatically close under their own weight, effectively preventing dust, insects, and moisture from entering the equipment through the air outlet. Available in flame-retardant ABS plastic or aluminum alloy, with a smooth surface and customizable colors, it’s widely used in industrial cabinets, 3D printers, fresh air systems, power modules, and other applications. It’s an ideal upgrade accessory to replace traditional metal mesh covers and enhance equipment protection.<\/h4>\n
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DUST FILTER<\/span><\/h2>\n
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Size\uff1a<\/td>\n25mm 30mm 40mm 50mm 60mm 70mm 80mm 90mm 120mm 172mm 200mm 220mm<\/td>\n<\/tr>\n

<\/p>\n

Product Name\uff1a<\/td>\nFan blinds<\/td>\n<\/tr>\n

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Colors:<\/td>\nBlack \/ White \/ Gray<\/td>\n<\/tr>\n

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Compatible fan size:<\/td>\n40\u00d740 \/ 60\u00d760 \/ 80\u00d780 \/ 92\u00d792 \/ 120\u00d7120 \/ 172\u00d7172 \/ 200\u00d7200<\/td>\n<\/tr>\n

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Mounting hole spacing:<\/td>\nMatching the corresponding fan hole spacing, or custom-made according to the cabinet openings.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Automatic Opening and Closing Design: Self-closing gravity louvers, zero power consumption, no noise, automatically operate with the fan’s start and stop; the motorized version can be controlled by a signal for forced opening and closing.<\/p>\n

Dustproof and Backflow Prevention: When closed, the blades overlap to form a labyrinth seal, effectively blocking dust, oil, and insects, and preventing external airflow backflow.<\/p>\n

Low Wind Resistance Ventilation: When fully open, the louvers have lower wind resistance than a mesh cover, having minimal impact on fan airflow and producing no additional wind noise.<\/p>\n

Rugged and Durable: The frame is made of ABS engineering plastic (flame retardant UL94 V-0 optional) or die-cast aluminum alloy, impact-resistant and anti-aging, suitable for long-term outdoor use.<\/p>\n

Aesthetically Pleasing and Clean: The flat louvered appearance conceals the internal fan and cables, giving the cabinet, chassis, and equipment enclosure a more professional look.<\/p>\n

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FAQ<\/h2>\n
\nDoes it really keep out dust when closed?<\/strong><\/summary>\n

When closed, the louvers overlap, blocking most settled dust and flying insects. For a higher dustproof level, a nylon filter can be installed inside the louvers for double protection.<\/p>\n<\/details>\n

\nWill installing louvers affect the fan’s airflow?<\/strong><\/summary>\n

The impact is minimal. When open, the louvers are nearly parallel to the airflow, resulting in a much lower drag coefficient than ordinary dust filters. Airflow loss is generally less than 2%.<\/p>\n<\/details>\n

\nHow do I attach it to the fan?<\/strong><\/summary>\n

We offer three common methods: adhesive-backed (attached to the outer frame of the fan air inlet), press-fit (directly embedded into the groove on the fan air inlet surface), and screw-fixed (align with the fan holes and tighten with screws). Please specify your preferred method when ordering.<\/p>\n<\/details>\n

\nAre there matching mounting screws?<\/strong><\/summary>\n

Generally, a set of mounting screws (the length is suitable for standard installation thicknesses) is included with the mesh cover<\/a>. If a special length is required, please specify separately.<\/p>\n<\/details>\n<\/div>","protected":false},"excerpt":{"rendered":"

Product Specifications<\/strong><\/h3>\n

Product Name<\/strong>: Fan Louver \/ Self-closing Air Outlet Grille<\/p>\n

Structure Type:<\/strong> Self-closing gravity louver (actuator optional)<\/p>\n

Frame Material:<\/strong> ABS engineering plastic (flame retardant V-0 optional) \/ Aluminum alloy<\/p>\n

Blade Material:<\/strong> ABS<\/p>\n

Number of Blades:<\/strong> 3~7 (depending on specifications)<\/p>\n

Opening Method:<\/strong> Opens by fan airflow, closes by gravity when fan stops<\/p>\n

Applicable devices\uff1a<\/strong><\/h3>\n