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The Thesvin washable metal primary filter mesh is a reusable pre-filter that installs in air-conditioning units and similar air-handling equipment to capture coarse particles. It filters airborne debris down to 5 μm using layers of expanded aluminium, stainless steel, or galvanised wire mesh held in a rigid frame. It suits homeowners, facility managers, and OEM engineers who need a durable, low-maintenance first stage of filtration that can be washed and reinstalled.
The filter is designed to drop into the existing filter slot of an air-conditioning unit or duct. The frame is made from aluminium alloy, galvanised steel, or stainless steel with a thickness of 1.0–2.0 mm, and the corners are reinforced to keep the panel square during handling. The mesh pack consists of 3–7 layers of expanded metal that are staggered and compressed, creating a stable core that resists sagging.
Installation uses a snap-fit or magnetic catch system, so the panel seats firmly without tools and can be removed for cleaning. This reduces air bypass around the edges that would otherwise let unfiltered air slip past. The rigid frame also protects the mesh layers from deformation when the filter is washed and reinserted.
Because the filter is customisable, the outer dimensions, frame material, and layer count can be matched to your unit’s opening. Standard sizes such as 500 × 500 × 10 mm are available, and custom sizes are produced to your drawing or sample. The result is a filter that locates positively, seals against the housing, and maintains its shape over repeated cleaning cycles.
This is a primary (pre-filter) element rated G1–G2, aimed at capturing particles of 5 μm and larger, including dust, lint, pollen, and other coarse debris. The staggered expanded-metal layers create a tortuous path that physically intercepts particles, while a weak electrostatic effect helps hold smaller fibres. It is not a fine filter and is not intended to replace HEPA or high-efficiency stages; rather, it protects downstream components and improves the life of secondary filters.
Typical applications include outdoor units of residential and commercial air conditioners, environments with heavy oil mist, and coastal or high-humidity areas where salt spray accelerates corrosion. For those corrosive settings, a 304 stainless steel mesh is available. The filter operates in temperatures from -20 °C to 250 °C, and at a face velocity of 2 m/s the resistance is ≤50 Pa, with airflow decay of less than 5% after repeated washing.
| Item | Detail |
|---|---|
| Filter medium | Aviation-grade aluminium foil mesh (general use), 304 stainless steel mesh (coastal corrosion resistance), or galvanised wire mesh (economical option) |
| Filtration class | G1–G2 (primary filtration), captures particles ≥5 μm |
| Construction | 3–7 layers of staggered expanded mesh; aluminium alloy, galvanised, or stainless steel frame, 1.0–2.0 mm thick, with reinforced corners |
| Operating temperature | -20 °C to 250 °C |
| Airflow resistance | ≤50 Pa at 2 m/s face velocity |
| Airflow decay | Less than 5% |
| Mounting | Snap-fit or magnetic catch, tool-free removal |
| Cleaning | Wash with low-pressure clean water and neutral detergent every 1–3 months (monthly in dusty seasons) |
| Standard size | 500 × 500 × 10 mm (other sizes available) |
| Customisation | Fully custom dimensions, frame material, and layer count to drawing or sample |
Thesvin controls dimensional consistency through IQC, IPQC, and OQC checks at each production stage. The company is certified to IATF 16949 (obtained in 2024) and holds ISO 9001, ISO 14001, and ISO 45001 certifications. A CNAS-accredited laboratory is available for filtration efficiency, dust-holding capacity, and resistance testing. Manufacturing takes place in a 50,000 m² facility that includes 20,000 m² of clean workshops across six rooms. Products comply with REACH and RoHS, and compliance documents can be provided.
To receive a quotation, please provide the following details:
With these details, we can confirm fitment and propose the most suitable mesh and frame combination. Contact our team to start your inquiry.
The filter is available in standard sizes such as 500 × 500 × 10 mm and in fully custom dimensions. To confirm fit, measure the filter slot and compare with our drawing, or send us the old filter for reference. We will match the frame size and mounting style to your unit.
Yes. You can send a used filter as a sample, and our engineers will measure it and produce a matching drawing for your approval. This is often faster than creating a drawing from scratch.
It is rated G1–G2 for primary filtration, capturing particles of 5 μm and larger. It is designed as a pre-filter and is not a substitute for fine or HEPA filters. Efficiency can be verified through our CNAS-accredited laboratory.
Clean the filter with low-pressure water and neutral detergent every 1–3 months, or monthly in dusty seasons. With proper maintenance, the metal mesh can be reused for a long service life. Replace it if the mesh is damaged or airflow resistance rises significantly.
Yes, samples can be provided for evaluation. Please specify the size and material you require, and we will prepare a sample according to your specifications. Sample lead time and cost will be confirmed with your inquiry.
MOQ depends on the size and customisation level. For standard sizes, the MOQ is lower; for fully custom filters, a higher quantity may apply. Please contact us with your requirements for a specific quote.
Lead time varies with order quantity and customisation. Standard sizes typically ship within 2–4 weeks after order confirmation, while custom projects may take longer. We will provide a precise schedule with your quotation.
Yes. For salt-spray or high-humidity environments, we recommend the 304 stainless steel mesh option. The frame can also be supplied in stainless steel to resist corrosion. This extends service life in harsh conditions.