The Zanxis metal frame non-woven fabric pre-filter is a coarse-grade air filter built on a separable double-frame (sub-frame and main frame) design, using high-toughness polyester fiber media. It is specified for commercial HVAC, fresh-air handling units, high-humidity exhaust, cleanroom make-up air, and as a pre-filter ahead of higher-efficiency stages. It suits facility engineers, HVAC contractors, and OEM buyers who need verifiable G3/G4 performance and controlled replacement cost.
| Item | Detail |
|---|---|
| Product name | Metal double-frame primary filter (metal sub-frame and main frame) |
| Core filtration media | High-toughness, high-humidity-resistant polyester fiber |
| Frame material options | Aluminum profile / galvanized steel / plastic |
| Extreme operating tolerance | Maximum operating temperature 50°C; maximum operating relative humidity 100% |
| Main thickness options | 46 mm / 69 mm / 96 mm (approximately 2 in, 3 in, 4 in) |
| Core applications | Central air-conditioning pre-filtration in factory workshops, high-humidity exhaust environments, fresh-air intakes for cleanrooms, air handling units (AHU) |
| Common standard sizes (W × H × T, mm) | 594 × 289 × 46 / 69 / 96; 594 × 492 × 46 / 69 / 96; 594 × 594 × 46 / 69 / 96 |
| Customisation (OEM/ODM) | 50,000 m² plant and CNAS-accredited laboratory; ISO/IATF16949 certified. Non-standard sizes and frame thicknesses fully supported. |
Before you approve a specification, confirm the filter class against EN 779 (G3 or G4, corresponding to ISO 16890 Coarse) and the particle size your project targets; the media is designed for good interception of particles ≥5 μm. Verify the actual face dimensions and thickness against your AHU rail or holding-frame drawing, since 46 mm, 69 mm, and 96 mm depths are not interchangeable in every housing. Check the maximum operating conditions: 50°C and 100% relative humidity are the stated limits, so confirm that your supply-air or exhaust temperature does not exceed them. Ask for the initial resistance at your design airflow, because a pre-filter that is selected only by size can raise fan energy or reduce airflow. Finally, agree on the replacement or cleaning interval with your maintenance team; in normal conditions the service life is about 2–3 months, depending on local dust loading, airflow, and running hours, and some versions can be washed and reused.
The filter is built around a separable frame: a sub-frame holds the polyester fiber media, and the main frame supports it in the air handling unit. When the media reaches the end of its service life, the sub-frame can be replaced while the main frame is retained, which reduces consumable cost compared with replacing the whole filter. The polyester fiber media is selected for toughness and resistance to high humidity, so the filter can operate in exhaust or fresh-air streams where relative humidity reaches 100%, provided the temperature stays at or below 50°C. The frame is available in aluminum profile, galvanized steel, or plastic, and the three standard depths (46 mm, 69 mm, 96 mm) cover common AHU rail sizes.
Typical installations include central air-conditioning pre-filtration in factory workshops, high-humidity exhaust systems, cleanroom fresh-air intakes, and air handling units. In these positions the filter captures coarse dust, hair, and fibers, protecting downstream medium- and high-efficiency filters and the core coils of the unit. Because the media is non-woven polyester, it does not shed loose fibers readily, which helps keep the downstream ductwork clean. The high wind-pressure resistance of the frame assembly helps the filter hold its shape when airflow is high, protecting the core unit from bypass or media rupture.
For selection, match the filter class and airflow to the fan curve, and confirm that the frame depth fits the holding frame without forcing. Where washable versions are used, establish a cleaning procedure and a drying step before reinstallation. Zanxis supports OEM/ODM customisation of size, structure, media grade, frame material, logo, and packaging, and has developed more than 1,000 filtration solutions.
Zanxis operates a self-built laboratory accredited by CNAS (China National Accreditation Service for Conformity Assessment), which can issue test reports for filtration efficiency, dust holding capacity, and resistance. These reports let you verify the values that matter for a pre-filter before you place a volume order. Production runs under IQC, IPQC, and OQC controls, so incoming materials, in-process dimensions, and outgoing performance are checked against the approved sample. The company holds IATF 16949 (obtained in 2024) and ISO 9001, ISO 14001, and ISO 45001 certifications, and products comply with REACH and RoHS requirements, with compliance documents available on request. Manufacturing takes place in a 50,000 m² plant in Zhongshan, Guangdong, China, which includes six clean workshops totaling 20,000 m², and multiple automated production lines support monthly output in the millions of pieces. With more than 20 years of filtration R&D and manufacturing experience, Zanxis has exported to Europe, the United States, Japan, and South Korea for over two decades.
To receive an accurate quotation and the right sample, please send the device or vehicle model, the required size or a drawing, the design airflow or water flow, the operating conditions (temperature, humidity, and dust loading), and the quantity you plan to order. With those details, Zanxis can confirm the filter class, frame material, and depth, and propose a sample and test-report package for your validation. Contact us to start the specification review.
Zanxis can provide test reports from its CNAS-accredited laboratory covering filtration efficiency, dust holding capacity, and resistance. These reports are issued for the relevant product and can be shared with B2B buyers during evaluation. Contact us with your target specification to request the matching report.
Standard-size samples can usually be dispatched quickly after confirmation, and custom samples require additional development time that depends on the drawing and frame complexity. Zanxis typically provides custom samples within 7–10 days after specification approval. Courier transit time is additional and is borne by the customer for free standard samples.
The metal frame non-woven fabric pre-filter is typically supplied in G3 or G4 according to EN 779, corresponding to ISO 16890 Coarse. It is designed for good interception of particles ≥5 μm, including coarse dust, hair, and fibers. Confirm the class against your project requirement before ordering.
Yes. Zanxis supports OEM/ODM customisation of dimensions, frame thickness, frame material (aluminum, galvanized steel, or plastic), media grade, logo, and packaging. Standard depths are 46 mm, 69 mm, and 96 mm, and non-standard sizes are produced to drawing. Send your AHU model and dimensions for a fit check.
For standard specifications the MOQ is generally 500 pieces, while custom specifications typically start at 1,000 pieces, subject to project discussion. Standard orders are usually delivered in 15–25 days, and custom orders in 25–35 days. Zanxis produces in Zhongshan, Guangdong, China, and can arrange sea, air, or express shipment.
Under normal conditions the service life is about 2–3 months, depending on local air cleanliness, airflow, and running hours. Some versions can be washed and reused, which further reduces operating cost. Establish a pressure-drop or scheduled replacement interval with your maintenance team.
For B2B customers with a clear purchase intent, Zanxis can provide standard-size samples free of charge, with the customer covering international courier costs. Custom samples may incur a small fee depending on development complexity, which can be credited against volume production. Test reports can be provided alongside the samples.
The approved sample is used as the reference for IQC, IPQC, and OQC inspections throughout production. Zanxis holds IATF 16949 and ISO 9001 certifications and operates a CNAS-accredited laboratory for performance verification. Each batch is checked for dimensions, media integrity, and resistance before shipment. Contact us to discuss your verification requirements.