Fresh Air System & Fresh Air Air Conditioner HEPA Filter

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.

Media Pairing and Layer Build

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.

Specification Sheet

Where It Is Used

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.

What to Send Us for a Custom Build

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:

• Device or vehicle model, and the location where the filter is installed.
• Dimensions or a drawing, including any frame or interface details.
• Required airflow rate or water flow rate (if applicable) and allowable pressure drop.
• Operating conditions such as temperature, humidity, and exposure to specific pollutants.
• Target efficiency class (e.g., F7, H11, H13) and expected service life.
• Estimated annual quantity and any packaging or branding requirements.

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.

Why Source from Ranveth

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.

Request Samples and a Quote

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.