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The Thesvin aluminum pre-filter is a 100% metal panel filter built from multi-layer corrugated expanded aluminum or stainless steel mesh held in an aluminum, stainless steel or ABS frame. It installs in the first filtration stage of commercial air-handling units, ventilation intakes, cooling towers and industrial exhaust systems, trapping coarse dust, lint, hair, fibers and oil smoke before they reach finer filters. It is made for facility engineers, HVAC contractors and equipment OEMs working in humid, high-temperature or corrosive plant environments where a washable, flame-retardant panel makes more sense than a disposable one.
Fitment comes first with a metal panel filter, because a frame that does not sit squarely in its track lets air bypass the mesh and defeats the stage. Thesvin builds this filter to the nominal face size and depth of the host device or duct opening: the standard depths are 1 inch (21 mm) and 2 inch (46 mm), and the common face sizes are 12×24 inch (287 × 592 mm) and 24×24 inch (592 × 592 mm). The rigid frame keeps the panel flat across the opening, so the mesh face stays fully exposed to the airstream instead of bowing under negative pressure.
Where a standard size does not match the holding frame, the panel is made to length, width and thickness from your drawing or an old part. Because the frame is metal or ABS rather than card, the panel holds its edges through repeated removal for washing, which matters in tracks that are opened often. The multi-layer corrugated mesh supports the filter face across its span and gives the panel a self-supporting body that keeps its shape when it is lifted out, rinsed and slid back in.
For duct and louver intakes in factories, the same panel serves as a coarse insect and leaf screen. In oil smoke service it is mounted where grease-laden air is drawn, so the metal construction can be cleaned without the media breaking down. Tell us the frame or track dimensions and the available depth, and the panel is built to that interface.
The Thesvin aluminum pre-filter is a coarse-stage filter rated G2–G4 to EN 779 or MERV 1–8 to ASHRAE 52.2, capturing particles larger than 5 μm — dust, hair, fibers, lint and similar debris. It is used in commercial central air-conditioning and ventilation systems, fresh-air units, cooling towers and electronic equipment cooling intakes, and as a protective pre-filter ahead of medium- and high-efficiency filters, which extends the service life of the stages behind it.
Because the filter is all metal, it suits conditions where disposable media fail: high-humidity and high-temperature industrial exhaust, corrosive acid and alkali workshop ventilation, and oil smoke extraction. The mesh is flame-retardant and resistant to acid and alkali, and it carries a low initial resistance. Multi-layer corrugated construction gives a large dust-holding capacity for a coarse filter, so the panel takes longer to load and the pressure drop climbs more slowly between washes. The filter is washable with circulating water and can be returned to service repeatedly, which lowers the cost of consumables over the life of the installation. Mesh layer count, frame material and filter grade can be specified for the application.
| Item | Detail |
|---|---|
| Product name | Aluminum pre-filter (metal mesh filter) |
| Core filter material | Multi-layer corrugated expanded aluminum mesh or stainless steel mesh; layer count customizable |
| Frame material | Aluminum profile frame, stainless steel frame or ABS plastic frame |
| Physical properties | Low initial resistance, flame-retardant, acid and alkali resistant, reusable after water washing |
| Typical applications | High-humidity and high-temperature industrial exhaust; pre-filtration in commercial central air conditioning; coarse insect and leaf screening for plant rooms; ventilation in acid and alkali workshops |
| Standard depths | 1 inch (21 mm) / 2 inch (46 mm) |
| Common sizes (W × H × D) | 12×24×1 inch (287 × 592 × 21 mm); 24×24×1 inch (592 × 592 × 21 mm); 12×24×2 inch (287 × 592 × 46 mm); 24×24×2 inch (592 × 592 × 46 mm) |
| Customization (OEM/ODM) | Any length, width, thickness and metal mesh layer count made to order; plant of 50,000 m²; ISO/IATF16949 certified |
Thesvin has held IATF 16949 automotive quality management certification since 2024 and works to ISO 9001, ISO 14001 and ISO 45001. Dimensional consistency is controlled through IQC, IPQC and OQC: incoming mesh and frame material are checked on receipt, panels are inspected in process, and finished filters are checked against the approved drawing before packing. That routine is what keeps successive batches of a metal panel interchangeable in the same track.
The in-house laboratory is CNAS-accredited and can issue test reports covering filtration efficiency, dust-holding capacity and resistance. Production runs in a 50,000 m² facility that includes 6 clean workshops totalling 20,000 m², with multiple automated lines and monthly capacity in the millions of pieces. Products meet REACH and RoHS requirements and compliance documents can be supplied. With more than 20 years of filter development and manufacturing, the company has exported to Europe, the United States, Japan and Korea for over two decades and has developed more than 1,000 filter solutions. OEM/ODM covers size, structure, filter grade, frame material, logo and packaging. The plant is in Zhongshan, Guangdong, China.
To quote the Thesvin aluminum pre-filter, send the device or vehicle model it serves, the frame size or a drawing, the airflow, the operating conditions (temperature, humidity, oil smoke or chemical mist) and the quantity you need. If no drawing exists, send the old part and we will work from it. Start here: contact our team.
The Thesvin aluminum pre-filter is built to the face size and depth of your holding frame or duct opening. Standard options are 1 inch (21 mm) and 2 inch (46 mm) depths, with common sizes of 12×24 inch (287 × 592 mm) and 24×24 inch (592 × 592 mm). Send your frame dimensions or a drawing and the panel is made to that interface.
Yes. An old panel, or a photo of the filter sitting in its frame, is often the clearest way to confirm fitment. We measure from it and confirm the mesh material, layer count and frame before making a sample.
The filter is a coarse stage rated G2–G4 to EN 779 or MERV 1–8 to ASHRAE 52.2, capturing particles larger than 5 μm such as dust, hair and fibers. It is used as a pre-filter ahead of medium- and high-efficiency stages to extend their service life. The exact grade can be specified for your application.
Yes. The all-metal mesh and frame are washable with circulating water and can be returned to service repeatedly. In a typical commercial air-conditioning environment the panel is cleaned on a 3–6 month cycle depending on air quality, and the overall service period can reach 1–2 years.
Standard sizes typically start at 500–1,000 pieces, and custom sizes are agreed case by case with flexible starting quantities. Tell us your size and annual volume and we will confirm the MOQ for that specification.
Standard stock items ship in about 7–10 days. Custom orders generally take 25–35 days depending on quantity and complexity. Multiple automated lines and a 50,000 m² plant support large orders.
Yes. Standard-size samples are provided free of charge with freight paid by the customer; custom samples carry a charge based on tooling and production complexity, refundable against a bulk order. Sample lead time is usually 3–7 working days.
The metal panel is cleaned rather than replaced on a short cycle — typically every 3–6 months in commercial air conditioning, depending on air quality. When the frame or mesh is damaged, a replacement panel is made to the same drawing. Send us your specification to start an inquiry.