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Contact Oltaven's fresh air HVAC HEPA filter is a composite air filter that combines polypropylene (PP) media with modified activated carbon to capture fine particles such as PM2.5 and pollen while…
FILTER MEDIA / ROLLS · SHEETS · DIE-CUT
Oltaven's fresh air HVAC HEPA filter is a composite air filter that combines polypropylene (PP) media with modified activated carbon to capture fine particles such as PM2.5 and pollen while adsorbing formaldehyde, TVOC, and other odours. It is designed for residential wall-mounted fresh air units, cabinet-style fresh air air conditioners, and central HVAC systems, and is available in efficiency classes from F7 to H13. As a finished filter manufacturer, Oltaven supplies complete filters—not just media—so you receive a product engineered for fit, airflow, and service life.
Media selection is the starting point, but the finished filter's behaviour is determined by how that media is pleated, framed, and sealed. Oltaven builds each filter around a composite PP core that provides mechanical filtration for PM2.5 and other fine particles, combined with a high-iodine-value activated carbon layer for odour and gas-phase adsorption. The pleating process sets the surface area available for dust loading; the frame provides structural integrity and dimensional stability; and the sealing method prevents air bypass around the media pack. These three elements—media, pleating, and framing/sealing—are chosen together to meet the target efficiency, initial resistance, and dust-holding capacity for each application.
Efficiency, resistance, and capacity are not properties of the media alone. They emerge from the interaction between media grade, pleat geometry, frame design, and the quality of the seal. A higher-efficiency media (for example, H13 rather than H11) will capture a greater share of submicron particles, but it also tends to increase resistance if the pleat count and depth are not adjusted. Oltaven balances these factors during development, using pleat patterns that provide enough media area to keep resistance within the air handler's capability while achieving the required efficiency class. The activated carbon layer adds gas-phase adsorption capacity, but its position and loading are controlled so that it does not unnecessarily restrict airflow. The result is a finished filter whose performance is repeatable and matched to the device's airflow and space constraints.
These filters are used in residential wall-mounted fresh air systems, cabinet-style fresh air air conditioners, and residential and commercial central fresh air (HVAC) systems. They are suitable for projects where both particle removal and odour control are needed, such as urban homes, offices, and light commercial spaces. Oltaven supplies filters in flat, V-bank, and composite configurations, with dimensions and frame types customised to the客户's equipment. The filters can be specified in efficiency classes from F7/F8/F9 (medium efficiency) up to H11/H12/H13 (HEPA), allowing one supplier to cover multiple product lines.
| Item | Detail |
|---|---|
| Product name | Fresh air / fresh air air conditioner composite filter |
| Core media | Composite PP (polypropylene) filter paper + modified odour-removing activated carbon |
| Particle filtration efficiency | Covers F7 / F8 / F9 (medium efficiency) to H11 / H12 / H13 (HEPA) grades |
| Core performance | Dual function: 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 | Residential wall-mounted fresh air machines, cabinet-style fresh air air conditioners, residential and commercial central fresh air systems (HVAC) |
| Customisation | Tooling and production fully according to customer's complete unit requirements (flat, V-bank, and composite customisation supported) |
| Quality and certifications | Strict air resistance and purification efficiency testing before shipment. Production complies with ISO 9001 quality management system and IATF 16949 international certification; materials are environmentally safe. |
Oltaven's core strength is OEM/ODM capability: we have developed more than 1,000 filtration solutions and support customisation of size, structure, media grade, frame material, logo, and packaging. Our production base covers 50,000 m², including six cleanrooms totaling 20,000 m², where HEPA filters are assembled in controlled environments. We operate a CNAS-accredited laboratory that can issue test reports for filtration efficiency, dust-holding capacity, and resistance. The company holds IATF 16949 (achieved in 2024) and ISO 9001, ISO 14001, and ISO 45001 certifications, and our products comply with REACH and RoHS environmental regulations, with compliance documents available. With over 20 years of filtration R&D and manufacturing experience, we have been exporting to Europe, the United States, Japan, and South Korea for more than two decades.
To receive a tailored quotation, please provide the following details: your device or vehicle model, required size or drawing, airflow or water flow (as applicable), operating conditions (temperature, humidity, contaminants), and estimated quantity. Our team will respond with a proposal and lead time. Contact Oltaven to discuss your filter requirements and how we can support your product development.
Resistance depends on the media grade, pleat count, pleat depth, and the quality of the seal, not just the external dimensions. A filter with more pleats or deeper pleats has more media area and generally lower resistance for the same efficiency. Oltaven balances these factors during development to match the air handler's capability.
An OEM project starts with your requirements: device model, dimensions or drawings, target efficiency, airflow, and operating conditions. Oltaven's engineering team evaluates these and proposes a design, followed by sampling for your validation. Once samples are approved, we finalise specifications and move to production.
This filter is available in efficiency grades from F7/F8/F9 (medium efficiency) to H11/H12/H13 (HEPA). The choice depends on your particle removal target and the airflow capacity of your system. Oltaven can advise on the appropriate grade during the project evaluation.
Yes, Oltaven provides full customisation of size, structure (flat, V-bank, or composite), media grade, frame material, logo, and packaging. We develop filters according to your complete unit requirements, including tooling if needed. With over 1,000 filtration solutions developed, we can often adapt an existing design or create a new one.
We welcome sample requests for evaluation. Standard samples may be provided free of charge with freight collect; custom samples may incur a fee that can be credited against a bulk order. Quotations are prepared based on your specifications and quantity, and we respond promptly with pricing and lead time.
MOQ for standard specifications is typically 500–1,000 pieces; for customised filters, MOQ is generally 1,000–3,000 pieces depending on specifications and packaging. Standard lead time is 15–25 days, while customised filters (including tooling) take 30–45 days. Oltaven has scalable production capacity to meet large orders.
In typical residential use, we recommend replacing the filter every 6–12 months, depending on air quality and operating hours. The activated carbon layer may exhaust its adsorption capacity sooner in high-odour environments. Regular inspection helps determine the right interval for your application.
Oltaven's production complies with ISO 9001 and IATF 16949, and the company holds ISO 14001 and ISO 45001 certifications. Products meet REACH and RoHS requirements, and our CNAS-accredited laboratory can issue test reports for efficiency, resistance, and dust-holding capacity. These documents support market entry and customer validation.