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The Celrith Fresh Air HVAC HEPA Filter is a composite PP and activated carbon filter for fresh air systems, wall-mounted fresh air units, cabinet fresh air air conditioners and residential or commercial central HVAC. It captures fine particulate matter such as PM2.5 and pollen while the high-iodine-value carbon layer adsorbs formaldehyde, TVOC and odour. It is built for appliance makers and HVAC brands that need a dual-effect filter matched to their own unit. Celrith supplies it as a fully customisable part, from F7/F8/F9 medium-efficiency grades to H11/H12/H13 HEPA grades.
Fresh air entering a home or a commercial space is never clean. It carries fine dust and PM2.5, pollen in season, and the odours and gases that come with urban air, new furniture and interior finishes. Indoors, the same air loop picks up formaldehyde and TVOC released slowly from boards, adhesives and coatings. A single-layer dust filter does little against these gases, and a carbon-only pad does little against fine particles. The result is a filter that appears to work while the air still smells, or air that smells acceptable while fine dust passes through.
The Celrith filter is built around that split. A composite PP medium handles the particles; a modified deodorising activated carbon layer with a high iodine value handles the gases and odours. Both functions sit in one part, so the appliance does not need two separate filter stages to cover dust and smell.
Contaminants do not only affect the air; they load the equipment. Fine particles collect on coils, fans and duct surfaces, and a loaded filter raises resistance, which pushes the fan to work harder and can reduce delivered airflow. Odour and gas loads are less visible but no less real: they shorten the useful life of any carbon stage and return as smell once the carbon is saturated.
For appliance makers, the wrong filter also loads the design. A filter that does not match the unit's cavity forces adapters, reduces airflow or adds noise. That is why Celrith treats fit and filtration as one problem: the medium controls the particle and gas load, while the custom forming controls the mechanical load on the unit.
The composite PP medium is the particle barrier. Depending on the grade selected, the filter is supplied at F7, F8 or F9 medium efficiency, or at H11, H12 or H13 HEPA efficiency. The same construction carries the modified activated carbon layer for deep adsorption of formaldehyde, TVOC and odours, giving dust removal and odour removal in a single part.
Celrith builds the filter to the customer's unit rather than to a catalogue size. Flat panel, V-bank folded and composite formats are available, and the size, structure and filter grade are set by the appliance requirement. Every unit is tested for airflow resistance and purification efficiency before it leaves the factory.
The contrast is simple: one filter stage instead of two, a matched fit instead of an adapter, and a tested part instead of an unverified one.
| Item | Detail |
|---|---|
| Product name | Fresh air system / fresh air air conditioner composite filter |
| Core filter media | Composite PP (polypropylene) filter paper plus modified deodorising activated carbon |
| Dust filtration efficiency | F7 / F8 / F9 (medium efficiency) through H11 / H12 / H13 (HEPA) |
| Core performance | Dual effect: removal of fine particulate matter (PM2.5, pollen) plus deep adsorption of formaldehyde, TVOC and odours |
| Product application categories | Fresh air system deodorising filter, fresh air air conditioner high-efficiency filter, fresh air machine HEPA composite cartridge |
| Main application scenarios | Household wall-mounted fresh air units, cabinet fresh air air conditioners, household and commercial central fresh air systems (HVAC) |
| Specification and size customisation | Tooling and production fully to the customer's complete-unit requirements (flat panel, V-bank folded and composite customisation supported) |
| Quality and certification | Airflow resistance and purification efficiency tested before shipment; production under ISO 9001 quality management and IATF 16949, with environmentally safe materials |
Celrith supplies this filter to fresh air appliance manufacturers, air conditioner brands and HVAC system integrators. Typical installations are household wall-mounted fresh air units, cabinet fresh air air conditioners, and household or commercial central fresh air systems. Because the filter is made to the unit, it also suits brands developing a new model that needs a matched composite stage for both particles and odours.
Buyers usually come with one of two needs: a replacement part for an existing platform, or a new filter design for a unit still in development. Both are handled through the same custom process, from size and format to filter grade.
Celrith products meet REACH and RoHS environmental requirements, and compliance documents can be provided. The company holds ISO 9001, ISO 14001 and ISO 45001 system certifications, and added IATF 16949 automotive quality management certification in 2024.
Testing is carried out in the company's own laboratory, which is CNAS-accredited and issues reports on filtration efficiency, dust holding capacity and resistance. Production runs in a 50,000 m² plant that includes 6 cleanrooms totalling 20,000 m². With more than 20 years of filter development and manufacturing experience and exports to Europe, the United States, Japan and South Korea over that period, Celrith supports OEM/ODM customisation of size, structure, filter grade, frame material, logo and packaging, backed by a library of more than 1,000 developed filtration solutions.
To quote accurately, tell us the device or vehicle model the filter fits, the required size or a drawing, the airflow or water flow of the system, the operating conditions, and the quantity you plan to order. Send these details through the contact page and our team will respond with a matched specification and quotation.
It removes fine particulate matter such as PM2.5 and pollen through the composite PP medium, and adsorbs formaldehyde, TVOC and odours through the modified activated carbon layer. Both functions are combined in one filter, so dust and odour are handled in a single stage.
The filter is supplied from F7, F8 and F9 medium efficiency through H11, H12 and H13 HEPA efficiency. The grade is selected to match the appliance and its airflow requirements. Every unit is tested for airflow resistance and purification efficiency before shipment.
Yes. Celrith makes the filter to the customer's complete-unit requirements, including size and structure, and supports flat panel, V-bank folded and composite formats. Size, structure and filter grade are set by the appliance design rather than by a fixed catalogue.
Yes. Share the device model, size or drawing, airflow, operating conditions and expected quantity through the contact page, and the team will confirm the specification and quote. Sample arrangements follow the agreed specification for your unit.
MOQ depends on the specification and format agreed for your unit, since this is a custom-made part. Provide your size, grade and quantity and the team will confirm the MOQ for that configuration.
Lead time is confirmed with the quotation, as it depends on the custom specification and order quantity. The 50,000 m² plant and its 6 cleanrooms totalling 20,000 m² support volume production once the specification is approved.
Replacement depends on the air quality and running hours of the installation; the carbon layer saturates over time and resistance rises as particles collect. Monitor odour return and airflow drop as the practical signals, and set a replacement interval for your model accordingly.
It is used in household wall-mounted fresh air units, cabinet fresh air air conditioners, and household and commercial central fresh air systems. It suits both replacement parts for existing platforms and new filter designs for units in development. Contact us with your model details to confirm the match.