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This is a composite HEPA filter for fresh air systems and fresh air air conditioners, combining polypropylene (PP) media with a modified activated carbon layer to capture fine particles such as PM2.5 and pollen while adsorbing formaldehyde, TVOC, and other odours. It is offered by Ranveth in efficiency classes from F7/F8/F9 (medium efficiency) up to H11/H12/H13 (HEPA), and is intended for appliance makers, HVAC OEMs, and air-quality equipment brands that need a filter matched to their unit. The design pairs media and layer structure deliberately so that efficiency, airflow resistance, and service life stay in balance.
At the core of this filter is a composite PP filter paper. PP fibres are chosen for their consistent diameter and resistance to moisture, which helps the media hold its efficiency across a wide range of operating conditions. The paper is combined with a modified activated carbon layer with a high iodine value, giving the filter two functions in one component: fine particle removal and odour adsorption. The activated carbon is not an afterthought; it is integrated into the layer build so that the pressure drop stays predictable and the carbon is not bypassed by the airflow.
The layer structure is arranged so that larger particles are captured first, protecting the HEPA layer behind and slowing the rise in resistance. This is why the same nominal efficiency can be offered in different configurations to suit the airflow and service life targets of a given unit. Because the filter is fully customisable, the media grade, layer order, and pleat geometry can be adjusted during development. Ranveth tests each build for airflow resistance and filtration efficiency before shipment, so the media pairing is verified rather than assumed. The result is a filter that delivers the required particle removal without excessive load on the fan, and an activated carbon stage that stays effective for the life of the filter.
| Item | Detail |
|---|---|
| Product name | Fresh Air System / Air Conditioner Composite Filter |
| Core filtration media | Composite PP (polypropylene) filter paper + modified odour-removal activated carbon |
| Particle filtration efficiency | F7 / F8 / F9 (medium efficiency) up to H11 / H12 / H13 (HEPA) |
| Core performance | Dual action: removal of fine particulate matter (PM2.5, pollen) + deep adsorption of formaldehyde, TVOC, and other odours |
| Product application categories | Fresh air system odour-removal filter, fresh air air conditioner high-efficiency filter, fresh air machine HEPA composite filter |
| Main application scenarios | Household wall-mounted fresh air machines, floor-standing fresh air air conditioners, household and commercial central fresh air systems (HVAC) |
| Customisation | Tooling and production fully according to customer unit requirements (flat panel, V-bank folded, and composite configurations supported) |
| Quality and certification | Strict airflow resistance and filtration efficiency testing before shipment. Production follows ISO 9001 quality management and IATF 16949 international certification; materials are environmentally safe. |
This filter is designed for the air path of fresh air systems and fresh air air conditioners, where outdoor air is drawn in and conditioned before entering the room. Typical installations include household wall-mounted fresh air machines, floor-standing fresh air air conditioners, and household or commercial central fresh air systems (HVAC). In these systems, the filter is usually the final barrier before supply air, so the balance between efficiency and resistance is critical. The activated carbon layer is particularly useful in urban environments where outdoor odours and traffic-related pollutants are present. Because the filter can be built as a flat panel, V-bank, or composite unit, it fits both compact residential units and larger central systems. Ranveth supplies this filter to appliance OEMs and HVAC equipment makers who need a reliable, test-backed component that matches their unit's dimensions and performance targets.
To develop a filter that fits your unit and meets your performance goals, we need a few key details. Please provide as much of the following as possible:
With these inputs, our engineering team can propose a media pairing and layer build, provide samples for evaluation, and quote accordingly. We also support OEM/ODM projects with custom logos and packaging.
Ranveth is a filtration manufacturer based in Zhongshan, Guangdong, China, with more than 20 years of experience in filter development and production. We support customers who need filters that are both effective and reliable.
Our in-house laboratory is accredited by CNAS (China National Accreditation Service for Conformity Assessment), and can issue test reports for filtration efficiency, dust holding capacity, and airflow resistance. This means the media choices we propose are backed by test data, not just specifications on paper. Our production base covers 50,000 m², including six cleanrooms totalling 20,000 m², where HEPA filters are assembled in a controlled environment to avoid secondary contamination. We are certified to IATF 16949 (achieved in 2024) and hold ISO 9001, ISO 14001, and ISO 45001 certifications. Our products comply with REACH and RoHS environmental regulations, and we can provide compliance documentation. With multiple automated production lines, monthly capacity reaches millions of pieces. Quality control follows IQC, IPQC, and OQC throughout the process. We have developed over 1,000 filtration solutions and have been exporting to Europe, the US, Japan, and South Korea for more than 20 years. For buyers who value test-backed media selection and consistent quality, Ranveth is a practical partner.
We welcome the opportunity to discuss your filter requirements. To request samples or a quotation, please contact us and include the device or vehicle model, dimensions or drawing, airflow or water flow rate, operating conditions, and estimated quantity. Our team will respond with a proposal and, where appropriate, samples for your evaluation.
It uses a composite PP (polypropylene) filter paper combined with a modified activated carbon layer with a high iodine value. This pairing provides dual action: fine particle removal (PM2.5, pollen) and adsorption of formaldehyde, TVOC, and other odours.
The filter is available in F7, F8, and F9 (medium efficiency) and H11, H12, and H13 (HEPA) classes. The specific class is selected based on your unit's airflow and filtration requirements.
Yes. We offer full customisation, including dimensions, layer structure, media grade, frame material, and packaging. We can produce flat panel, V-bank folded, and composite configurations to match your unit's design.
Under standard fresh air system conditions, the typical service life is 6–12 months, depending on air quality, operating hours, and pre-filter configuration. Using a G4 pre-filter and F7/F8 medium filter can extend the HEPA filter's life.
For standard products, the MOQ is typically 500–1000 pieces. For custom products, the MOQ is negotiated based on specification complexity. We also support small trial orders for new customers.
Standard stock products ship within 7–15 days. Custom products typically take 25–35 days for the first order and 15–25 days for repeat orders. Our 50,000 m² facility provides ample capacity for large orders.
Yes, we encourage sample testing. Standard samples are available quickly, and custom samples typically take 7–15 days. We can include CNAS laboratory test reports with key parameters such as efficiency, initial resistance, and dust holding capacity.
Please <a href="/en/contact">contact us</a> with your device or vehicle model, dimensions or drawing, airflow or water flow rate, operating conditions, and estimated quantity. Our team will respond with a proposal and samples for evaluation.