The Zanxis washable primary efficiency filter is a reusable pre-filter built on a high-strength aluminium frame and a high-throughput, abrasion-resistant PET (polyester fibre) media. It removes coarse dust, hair, fibres and insects ahead of cooling coils, AHUs and downstream fine filters, and is rated at G3, G4 or M5, so it serves HVAC, industrial, food, pharmaceutical, automotive, energy, data-centre and cleanroom pre-filtration duties. It is intended for facility engineers, HVAC contractors, OEM/ODM buyers and maintenance teams who need a pre-filter they can wash and refit rather than replace. Its design point is high airflow at low resistance, rated at 2.5 m/s for large-volume industrial fresh-air systems.
| Item | Detail |
|---|---|
| Product name | Washable primary/medium air filter |
| Efficiency class | G3 / G4 / M5, matched to pre-filter and medium-filter duty |
| Media | High-throughput, abrasion-resistant PET (polyester fibre) filter mesh |
| Frame | Corrosion-resistant aluminium frame |
| Rated operating face velocity | 2.5 m/s, optimised for high-airflow industrial fresh-air systems |
| Typical applications | Industrial plant HVAC systems, high-humidity exhaust environments, pre-filtration in heavy-dust workshops, central air-conditioning intakes in commercial buildings |
| Standard sizes (W × H × D) | 12×24×2 in (289 × 594 × 46 mm); 16×20×2 in (390 × 492 × 46 mm); 20×20×2 in (492 × 492 × 46 mm); 20×24×2 in (492 × 594 × 46 mm); 24×24×2 in (594 × 594 × 46 mm) |
| Customisation (OEM/ODM) | Non-standard sizes, thicknesses and efficiency classes supported; produced in a 50,000 m² plant with a CNAS-accredited laboratory; ISO and IATF 16949 certified |
| Washability | Supports repeated water washing (rinse-and-reuse maintenance) |
Before you approve a specification, confirm the four values that decide whether this filter performs in your system. First, efficiency class: G3, G4 and M5 are all available, and the correct choice depends on the dust load and on what the downstream filter is protecting. Second, rated velocity: the 2.5 m/s figure is the design point for this media and frame; if your duct velocity differs, confirm the resulting resistance and efficiency with us rather than assuming the rated value carries over. Third, dimensional fit: the five standard sizes run from 289 × 594 × 46 mm to 594 × 594 × 46 mm, and any non-standard size, thickness or efficiency can be customised, so give us the actual opening and depth. Fourth, wash regime: because the media is PET and the frame is aluminium, confirm your cleaning method, water temperature and drying practice against our maintenance instructions so that repeated washing does not shorten service life.
We recommend approving this filter through samples and measurement rather than datasheet alone. A typical sequence:
The filter pairs a corrosion-resistant aluminium frame with a PET polyester fibre mesh chosen for high throughput and wear resistance. The aluminium frame is intended to hold its shape under pressure and resist corrosion in humid exhaust and fresh-air service, while the PET media tolerates repeated washing — the combination that makes this a reusable pre-filter rather than a disposable one. In practice it is fitted at the intake of central air-conditioning systems, in AHU and fresh-air units, in heavy-dust workshop pre-filter stages and in high-humidity exhaust paths, where it captures the coarse fraction before air reaches coils or finer filters. Because it is rated at 2.5 m/s, it suits large-volume industrial ventilation where low resistance matters to fan energy. Typical service covers commercial building HVAC, pharmaceutical and food processing areas, automotive and machinery plants, energy and metal smelting sites, energy-storage facilities, AI computing and data centres, semiconductor and microelectronics facilities, and medical and cleanroom pre-filter stages.
Verification starts with our own laboratory. Zanxis operates a CNAS-accredited laboratory that issues test reports covering filtration efficiency, dust holding capacity and resistance, so the values on a quotation can be traced to measurement rather than catalogue copy. Production runs under IQC, IPQC and OQC controls across the process. The company holds IATF 16949 automotive quality management certification, obtained in 2024, together with ISO 9001, ISO 14001 and ISO 45001 system certification, and products meet REACH and RoHS requirements with compliance documents available. Manufacturing takes place in Zhongshan, Guangdong, China, in a 50,000 m² plant that includes six clean workshops totalling 20,000 m², with multiple automated production lines and monthly capacity reaching millions of pieces. With more than 20 years of filtration development and manufacturing experience and continuous export to Europe, the United States, Japan and Korea, we support OEM/ODM customisation of size, structure, media grade, frame material, logo and packaging, and have developed more than 1,000 filtration solutions.
To move from specification to verified supply, send us: the device or vehicle model (or AHU/duct model), the size or a drawing of the frame opening, the airflow or water flow through the unit, the operating conditions (temperature, humidity, dust load), and the quantity you expect per order and per year. With those details we can confirm the right efficiency class and dimensions, propose a sample plan and issue the matching laboratory reports. Start the conversation through our contact page.
Yes. Our CNAS-accredited laboratory issues reports covering filtration efficiency, dust holding capacity and resistance for the agreed specification. We send these alongside samples so you can compare measured values with your system requirements before batch production.
This filter is available in G3, G4 and M5. The right class depends on your dust load and on the downstream filter you are protecting, so confirm it with us when you send the device model and operating conditions. The rated operating face velocity is 2.5 m/s.
Send the frame opening, required depth and a drawing if available, and we will match it to one of the five standard sizes — from 289 × 594 × 46 mm to 594 × 594 × 46 mm — or define a custom size and thickness. Samples are then supplied for a physical fit check in your unit.
Sample lead time depends on whether the specification is standard or custom, and we confirm it when the request is defined. The sequence is sample request, fit and performance check, report review, then specification lock and batch production.
MOQ and custom-size terms are set per project and confirmed with your quotation. We support OEM/ODM customisation of size, thickness, efficiency class, frame material, logo and packaging, drawing on more than 1,000 filtration solutions developed to date.
The filter supports repeated water washing, and the interval depends on dust load and site conditions rather than a fixed calendar period. We recommend defining a wash interval from observed resistance rise during sample validation and following our maintenance instructions for washing and drying.
Yes — sample verification is part of our standard workflow. We supply samples of the agreed specification together with the relevant laboratory reports, and after your sign-off we lock media, frame, dimensions, class, labelling and packaging for production.
Please provide the device or vehicle model, the size or a drawing, the airflow or water flow, the operating temperature, humidity and dust load, and your expected quantity. Send these through our contact page and we will respond with a specification and sample plan.