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This washable metal primary filter mesh is a reusable pre-filter for HVAC and appliance air intakes, built from layered aluminium, stainless steel or galvanised wire mesh. It captures particles of 5 μm and larger at G1–G2 efficiency, protecting downstream coils and filters. It suits homeowners, facility managers and OEM buyers who want low running cost and long service life, and it is manufactured by Ranveth in Zhongshan, Guangdong, China.
The filter's performance comes from how its media and layers are paired. Three to seven layers of corrugated or pleated expanded metal are stacked in an offset pattern. This creates a deep, three-dimensional capture structure that holds dust across the depth of the mesh rather than only on the surface. As a result, the filter maintains a low airflow resistance of ≤50 Pa at a face velocity of 2 m/s, and airflow decay stays below 5% over its service interval.
The choice of metal sets the filter's operating envelope. Aluminium foil mesh is the general-purpose option for most HVAC and appliance applications. 304 stainless steel mesh is specified for coastal or high-humidity installations where salt spray accelerates corrosion of lesser metals. Galvanised iron wire mesh provides an economical solution for dry, less demanding environments. In each case, the metal is selected to match the operating conditions, so the filter delivers stable efficiency without premature clogging or structural failure.
This pairing also determines service life. The rigid metal layers resist compression and deformation during cleaning, so the filter can be washed and reused for many cycles. The physical capture mechanism is complemented by a weak electrostatic effect that helps hold fine particles until they are removed by washing. The result is a filter that combines G1–G2 efficiency with a working temperature range of -20°C to 250°C, making it suitable for demanding thermal environments as well as everyday air conditioning.
| Item | Detail |
|---|---|
| Core filter media | Aviation-grade aluminium foil mesh (general-purpose); 304 stainless steel mesh (coastal corrosion resistance); galvanised iron wire mesh (economical) |
| Filter class and efficiency | G1–G2 (primary filtration); high-efficiency capture of particles ≥5 μm |
| Structure and frame | 3–7 layers of corrugated/pleated expanded mesh stacked in an offset pattern; aluminium alloy, galvanised or stainless steel frame (1.0–2.0 mm thickness, reinforced corners) |
| Operating performance | Operating temperature: -20°C to 250°C; airflow resistance: ≤50 Pa (at 2 m/s face velocity); airflow decay <5% |
| Installation and maintenance | Snap-fit or magnetic design for easy installation and leak prevention. Recommended cleaning every 1–3 months (every month during dusty seasons) with low-pressure clean water and neutral detergent. |
| Applications and sizes | Residential and commercial air-conditioner outdoor units, heavy grease environments, high-humidity salt-spray areas. Standard sizes (e.g., 500×500×10 mm) and fully customised sizes available. |
This filter mesh is used in residential and commercial air-conditioner outdoor units, where it protects coils from dust, leaves and debris. Its resistance to grease makes it suitable for kitchens and heavy-oil-mist environments, and its stainless steel variant is chosen for coastal or high-humidity areas where salt spray is a concern. The filter is also used as a pre-filter in ventilation systems, helping extend the life of secondary filters. Because it can be washed and reused, it is often specified for applications where regular filter replacement would be costly or inconvenient.
To build a filter to your requirements, please provide the following information:
With these details, Ranveth can recommend the appropriate layer count, media and frame to meet your performance and cost targets. Our team has developed more than 1,000 filter solutions and supports OEM/ODM customisation of size, structure, filter class, frame material, logo and packaging.
Ranveth's approach to filter design is backed by testing and manufacturing discipline. Our in-house laboratory is accredited by CNAS, and we can issue test reports for filtration efficiency, dust holding capacity and airflow resistance, so media choices are supported by measured data rather than assumption.
Production takes place in a 50,000 m² plant in Zhongshan, Guangdong, China, which includes six cleanrooms totalling 20,000 m². The factory operates under IATF 16949 (achieved in 2024), ISO 9001, ISO 14001 and ISO 45001 systems, and products comply with REACH and RoHS requirements, with documentation available on request. With more than 20 years of experience in filtration and continuous export to Europe, the US, Japan and Korea, Ranveth combines materials expertise with reliable, scalable manufacturing. Multiple automated production lines support monthly output of millions of pieces, and IQC, IPQC and OQC checks run throughout the process.
To discuss your requirements, please send us your device or vehicle model, required size or drawing, airflow or water flow data, operating conditions and estimated quantity. We will respond with a tailored proposal and sample options. Visit our contact page to get in touch.
The filter uses layered metal mesh: aviation-grade aluminium foil as standard, 304 stainless steel for coastal or high-humidity areas, or galvanised iron wire for economical solutions. These layers are stacked in a 3–7 layer corrugated pattern to create a deep capture structure.
The offset stacking of 3–7 corrugated layers increases dust-holding depth while maintaining low airflow resistance. At a face velocity of 2 m/s, resistance is ≤50 Pa, and airflow decay remains below 5%, supporting G1–G2 efficiency for particles ≥5 μm.
Yes. Ranveth offers full customisation of size, layer count, media type (aluminium, stainless steel or galvanised), frame material and thickness, as well as logo and packaging. Provide your device model or drawing and operating conditions, and we will recommend a specification.
Clean the filter every 1–3 months, or every month in dusty seasons. Use low-pressure clean water and a neutral detergent, then allow it to dry before reinstalling. The snap-fit or magnetic design makes removal and reinstallation straightforward.
The filter operates from -20°C to 250°C, making it suitable for a wide range of HVAC and appliance applications, including high-temperature environments.
Yes, samples are available for evaluation. Lead time depends on the specification and order quantity; please contact us with your requirements for a precise schedule. For standard sizes, we can often ship from stock.
MOQ varies by product and customisation level. For standard sizes, we support flexible quantities; for custom builds, MOQ is determined by the specific design. Please inquire with your estimated annual usage.
Because the metal layers resist compression and can be washed repeatedly, this filter offers a long service life with no replacement media to buy. It maintains efficiency over many cleaning cycles, reducing waste and ongoing cost compared with disposable filters.