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Fale conosco 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…
FILTER MEDIA / ROLLS · SHEETS · DIE-CUT
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 odours. It is made by Oltaven for appliance makers and HVAC equipment suppliers who need finished filters that fit their units and meet defined efficiency classes. The filter is available in F7/F8/F9 (medium efficiency) through H11/H12/H13 (HEPA) grades, with dimensions, frame and configuration customised to your unit.
A filter is more than its media. The same PP media can become a low-resistance panel for a wall-mounted fresh air unit or a high-capacity pleated cartridge for a central HVAC system, depending on how it is pleated, framed and sealed. Oltaven sells finished filters, not just media, so we control those steps and can tune the finished product to your device.
Pleating increases the media area inside a given frame. More pleats generally mean more dust-holding capacity and lower initial resistance, but the pleat height and spacing must suit the airflow path and pressure budget of the unit. Framing gives the pleat pack mechanical stability and defines how the filter seats in the housing. Sealing closes the edges so that air does not bypass the media. Each decision interacts: a tighter pleat pack may raise resistance; a more open pack may reduce efficiency if the media grade is not matched. Oltaven offers flat panel, V-bank folded and composite configurations, and we work from your unit’s dimensions and airflow target to choose the combination.
Three outcomes matter to the appliance maker: particle efficiency, resistance and capacity. In this product, the PP media and the activated carbon layer are selected together. The PP side is chosen for the target class (F7/F8/F9 or H11/H12/H13) and for the pressure drop it will produce at the design airflow. The activated carbon layer is chosen for its iodine value and odour-removal behaviour; a high iodine value supports deeper adsorption of formaldehyde and TVOC. Because the two layers sit in one filter, the finished resistance is the sum of both, and the frame and seal must be designed so that air passes through the media rather than around it.
Forming choices then set how that media behaves in service. Pleat count and depth determine how much dust the filter can hold before resistance rises to the change-out point. The frame type and sealing method affect fit and bypass. Oltaven tests finished filters for resistance and efficiency before shipment, and the production system follows ISO 9001 and IATF 16949. The practical result is that two filters of the same outer size can perform differently if their pleating, framing or sealing differ, which is why we design to the unit rather than to a catalogue size alone.
This filter is used in household wall-mounted fresh air machines, floor-standing fresh air air conditioners, and residential or commercial central fresh air systems (HVAC). It is also suitable for fresh air systems that require odour removal, high-efficiency fresh air air conditioners, and composite HEPA cartridges for fresh air machines. Because it combines particle removal and odour adsorption, it suits units where a single filter stage must address both PM2.5 and gaseous contaminants.
| Item | Detail |
|---|---|
| Product name | Fresh air system / fresh air air conditioner composite filter |
| Core filtration media | Composite PP (polypropylene) filter paper with modified odour-removal activated carbon |
| Particle filtration efficiency | Covers F7 / F8 / F9 (medium efficiency) through H11 / H12 / H13 (HEPA) grades |
| Core performance | Dual action: removal of fine particles (PM2.5, pollen) plus deep adsorption of formaldehyde, TVOC and odours |
| Application categories | Odour-removal filters for fresh air systems, high-efficiency filters for fresh air air conditioners, composite HEPA cartridges for fresh air machines |
| Main applications | Household wall-mounted fresh air machines, floor-standing fresh air air conditioners, residential and commercial central fresh air systems (HVAC) |
| Size and configuration | Tooling and production fully according to customer unit requirements; flat panel, V-bank folded and composite configurations available |
| Quality and certification | Resistance and efficiency tested before shipment; production follows ISO 9001 quality management and IATF 16949; materials meet environmental safety requirements |
Oltaven supports OEM/ODM projects and has developed more than 1,000 filtration solutions. Our plant covers 50,000 m², including six cleanrooms totalling 20,000 m², where HEPA filters are produced to limit secondary contamination. We operate a CNAS-accredited laboratory that can issue test reports for filtration efficiency, dust-holding capacity and resistance, and our quality system is certified to ISO 9001, ISO 14001 and ISO 45001, with IATF 16949 added in 2024. Products comply with REACH and RoHS, and we can provide compliance documents. With more than 20 years of filtration manufacturing experience, we have exported to Europe, the United States, Japan and Korea for over two decades. Our address is Zhongshan, Guangdong, China.
To quote accurately, please tell us your device or vehicle model, the size or drawing, the airflow or water flow, the operating conditions, and the quantity you expect. If you already have a target efficiency class or a sample filter, include that as well. Our team will respond with a proposed configuration and next steps. Contact Oltaven to start your custom filter project.
Resistance depends on how the media is pleated, framed and sealed, not only on the outer dimensions. A tighter pleat pack or a different media grade can raise or lower pressure drop at the same airflow. Oltaven designs the pleat and frame together with the media to meet your unit’s resistance target.
It covers F7/F8/F9 (medium efficiency) through H11/H12/H13 (HEPA) grades. The grade is selected with the media and pleating during design, and finished filters are tested for resistance and efficiency before shipment.
It starts with your device or vehicle model, size or drawing, airflow or water flow, operating conditions and expected quantity. Oltaven then proposes a media, pleat and frame configuration and provides a sample for evaluation before production.
Yes. Sizes and configurations are made fully according to your unit requirements, including flat panel, V-bank folded and composite types. Frame material, logo and packaging can also be customised as part of the OEM/ODM scope.
Yes. Standard samples can be provided quickly, and custom samples typically take 7–15 days. We can include CNAS laboratory test reports covering efficiency, initial resistance and dust-holding capacity so your technical team can evaluate the filter.
Standard products usually have an MOQ of 500–1,000 pieces, while custom products are quoted according to specification complexity; small trial orders are supported. Standard stock ships in 7–15 days, custom first orders usually take 25–35 days, and repeat orders 15–25 days.
Under standard fresh air system use, typical service life is 6–12 months, depending on outdoor air quality, running hours and pre-filtration. Using G4 pre-filters and F7/F8 medium filters ahead of the HEPA stage can extend the main filter’s life.
Production runs in a 50,000 m² plant with six cleanrooms totalling 20,000 m², under ISO 9001 and IATF 16949 systems. IQC, IPQC and OQC checks cover incoming materials, in-process production and outgoing goods, and finished filters are tested for resistance and efficiency. For a project review, <a href="/en/contact">contact Oltaven</a> with your requirements.