This cylindrical HEPA filter is a 360° radial-flow filter element designed for car air purifiers. It captures PM2.5, pollen, dust and other airborne particles, and can be customised with additional activated carbon for odour and formaldehyde reduction. It suits automotive OEM and aftermarket brands, as well as desktop and humidifier-purifier applications. Zanxis manufactures it to order in Zhongshan, Guangdong, China, with efficiency grades from H11 to H13 and full dimensional customisation.
| Item | Detail |
|---|---|
| Product name | Cylindrical HEPA Filter for Car Air Purifier |
| Structure | 360° annular air inlet, high-density pleating, maximised effective area |
| Core filter media options | PP melt-blown layer / PP+PET composite / PTFE high-efficiency material |
| Filtration efficiency | Customisable HEPA grades H11–H13 according to end-device requirements |
| Composite upgrade options | Inner or outer pre-filter layer; built-in columnar or modified activated carbon layer for formaldehyde and odour removal |
| Core applications | OEM and aftermarket car air purifiers, desktop compact purifiers, humidifier-purifier combinations |
| Dimensions | Tooled to customer requirements: outer diameter, inner diameter, height and base sealing flange |
| Quality system | Produced in a 20,000 m² clean workshop; IATF 16949 automotive quality management system and ISO 9001/14001 certified |
Before a sample is built, we confirm the parameters that determine fit and filtration performance. These include the target HEPA grade (H11, H12 or H13), the particle size and efficiency specification, the media type (PP, PP+PET or PTFE), and the airflow resistance at the intended operating flow rate. Because the filter is custom-tooled, the outer diameter, inner diameter, height and base sealing flange dimensions must be agreed from a drawing or physical sample. If a carbon stage is required, the carbon type (columnar or modified), the target gas (formaldehyde, odours) and the acceptable pressure drop are also confirmed. These values are recorded on the specification sheet that accompanies each sample.
The filter is built around a 360° annular inlet that draws air through the entire circumference, which increases the effective filtration area within a compact envelope. High-density pleating raises the media area further, supporting a higher CADR in the end device while keeping resistance within the purifier's fan curve. The media choice is matched to the application: PP melt-blown for cost-sensitive H11–H12 duties, PP+PET composite for balanced efficiency and dust holding, and PTFE for higher efficiency grades or demanding environments.
For combined particle and gas filtration, we can add an inner or outer pre-filter layer to capture coarse dust, or integrate a columnar or modified activated carbon layer targeting formaldehyde and odours. The cylindrical format is suited to car air purifiers mounted in cup holders, centre consoles or under seats, as well as desktop purifiers and humidifier-purifier combinations. Because each element is tooled to the customer's drawing, the base sealing flange and overall dimensions are matched to the purifier housing to avoid bypass.
Zanxis operates a self-built laboratory accredited by CNAS (China National Accreditation Service for Conformity Assessment), which issues test reports on filtration efficiency, dust holding capacity and resistance. These reports allow brand owners to verify the values quoted for each filter grade before mass production. Quality control follows IQC, IPQC and OQC stages: incoming media and components are inspected, in-process pleating and sealing are monitored, and finished filters are checked against the signed sample.
The production base covers 50,000 m², including six clean workshops totalling 20,000 m², which support contamination-controlled assembly and packaging. The company has held IATF 16949 automotive quality management system certification since 2024, and also holds ISO 9001, ISO 14001 and ISO 45001 certifications. Products comply with REACH and RoHS requirements, and compliance documents can be provided. With more than 20 years of filtration R&D and manufacturing experience and over 1,000 filtration solutions developed, Zanxis supports OEM/ODM projects covering dimensions, structure, media grade, frame material, logo and packaging. Multiple automated production lines allow monthly output in the millions of pieces. The company is located in Zhongshan, Guangdong, China.
To receive samples and the corresponding test reports, please provide the following: your device or vehicle model, the required dimensions or a drawing, the target airflow or water flow, the operating conditions (temperature, humidity, pollutant profile), and your estimated quantity. Send these details through our contact page and our engineers will respond with a specification proposal and sample lead time.
Yes. Zanxis issues test reports from its CNAS-accredited laboratory covering filtration efficiency, dust holding capacity and resistance for the agreed specification. These reports are provided with samples and can be referenced for mass production acceptance. Please share your target grade and airflow so the correct test conditions can be confirmed.
For existing specifications, samples are typically dispatched within 3–5 working days. Custom-tooled samples usually take 15–25 working days, depending on drawing complexity. After you receive the sample, we recommend installing it in your purifier and confirming fit, airflow and noise before sign-off.
The filter can be customised to H11, H12 or H13 grades, with efficiency verified by our CNAS-accredited laboratory according to the agreed particle size and test method. The 360° annular inlet and high-density pleating increase effective media area, which supports a higher CADR in the end device. Efficiency grade, media type and resistance are confirmed on the specification sheet before production.
Yes. Dimensions are fully tooled to customer requirements, including outer diameter, inner diameter, height and base sealing flange design. We also offer pre-filter layers and built-in activated carbon for formaldehyde and odour removal. Please provide a drawing or physical sample so the fit and sealing can be confirmed.
The standard MOQ for the cylindrical HEPA filter is typically 1,000 pieces; custom tooling may require a different MOQ depending on complexity. Bulk lead time is generally 25–35 days after sample approval and receipt of deposit. Peak-season orders are best placed in advance to secure production slots.
Under normal in-car use, we recommend replacement every 6–12 months, depending on air pollution levels and daily operating hours. The high dust holding capacity of the pleated media helps maintain performance between changes. We can provide life-test data from our laboratory to help you set a replacement schedule for your market.
Yes. Zanxis products comply with REACH and RoHS requirements, and compliance documents can be provided. The production system is certified to IATF 16949, ISO 9001, ISO 14001 and ISO 45001. Please specify your destination market so the relevant documentation can be prepared with your order.
Send your device or vehicle model, required dimensions or drawing, target airflow, operating conditions and estimated quantity through our contact page. Our engineers will review the requirements and respond with a specification proposal, sample plan and quotation. We aim to provide a clear, test-based response so you can evaluate the filter against your purifier's requirements.