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The Celrith Fresh Air / Fresh Air Conditioning HEPA Filter is a composite panel filter that combines polypropylene (PP) media with a modified activated carbon layer to capture fine particles such as PM2.5 and pollen while adsorbing odours, formaldehyde and TVOCs. It is designed for residential wall-mounted fresh air units, cabinet fresh air conditioners, and central HVAC systems. Celrith offers this filter in efficiency classes from F7 to H13, with full customisation to fit your equipment.
Fresh air systems and air conditioners draw in outdoor air that carries more than just dust. Fine particulate matter — especially PM2.5 — penetrates indoor spaces and can remain suspended for hours. Along with particles, outdoor air brings odours from traffic, industry and vegetation, plus gaseous pollutants such as formaldehyde and volatile organic compounds (TVOCs) that can be released from building materials and furnishings. In urban or industrial areas, these contaminants accumulate quickly, and without effective filtration they compromise indoor air quality and put extra strain on the entire ventilation system.
Standard particle filters capture some dust but do little against gases and odours. Conversely, carbon-only filters may adsorb odours but let fine particles pass. The dual challenge requires a filter that addresses both solid and gaseous contaminants in a single stage, without creating excessive pressure drop or shortening the life of downstream components.
When particles and gases are not effectively removed, the consequences ripple through the system. Dust buildup on fans, coils and heat exchangers reduces heat transfer efficiency and can lead to higher energy consumption. Odours and gases that bypass the filter may corrode electronic components or leave persistent smells in the conditioned space. In fresh air systems, a clogged or saturated filter increases resistance, forcing the fan to work harder and potentially reducing airflow below design specifications. Over time, this added load can shorten motor life and increase maintenance frequency.
For homeowners and facility managers, the result is a system that delivers less fresh air, consumes more energy and requires more frequent servicing. For equipment manufacturers, inadequate filtration can lead to customer complaints and warranty claims. Selecting a filter that balances high efficiency with low pressure drop and adequate dust-holding capacity is therefore critical to protect both indoor air quality and the equipment itself.
The Celrith Fresh Air / Fresh Air Conditioning HEPA Filter tackles both contaminant types in one composite construction. The core filter media is a composite PP material that provides high particle capture efficiency, ranging from F7/F8/F9 (medium efficiency) up to H11/H12/H13 (HEPA). This allows the filter to remove fine particles such as PM2.5 and pollen with a measured efficiency that can be tailored to your requirements.
Behind the particle layer, a modified activated carbon layer with high iodine value adsorbs formaldehyde, TVOCs and other odorous gases. This dual-action design means a single filter stage addresses both particulate and gaseous pollutants, simplifying system design and reducing the number of components. The carbon layer is specifically treated to enhance its adsorption capacity for common indoor air pollutants, helping to maintain a fresher indoor environment.
Celrith manufactures these filters with full customisation in mind. We can produce panel, V-bank folded, or composite configurations to match your exact equipment requirements. Whether you need a drop-in replacement for an existing fresh air unit or a custom-designed filter for a new air conditioner model, our engineering team works with you to optimise dimensions, media grade, frame type and carbon loading. This flexibility ensures a proper fit and optimal performance in your specific application.
| Item | Detail |
|---|---|
| Product name | Fresh Air / Fresh Air Conditioning Composite Filter (Fresh Air System / Air Conditioner Filter) |
| Core filter media | Composite PP (polypropylene) filter paper + modified odour-removal activated carbon |
| Particle filtration efficiency | Covers F7 / F8 / F9 (medium efficiency) to H11 / H12 / H13 (HEPA) grades |
| Core performance | Dual-action: removes fine particulate matter (PM2.5, pollen) + deeply adsorbs formaldehyde, TVOC and other odours |
| Product application categories | Fresh air system odour-removal filter, fresh air conditioner high-efficiency filter, fresh air machine HEPA composite filter |
| Main application scenarios | Residential wall-mounted fresh air units, cabinet fresh air conditioners, residential and commercial central fresh air systems (HVAC) |
| Specification and size customisation | Fully customised moulding and production according to customer's complete unit requirements (supports panel, V-bank folded, and composite customisation) |
| Quality and certification assurance | Strict air resistance and purification efficiency tests before shipment. All production complies with ISO 9001 quality management system and IATF 16949 international certification; materials are environmentally safe. |
This filter is used by manufacturers of residential wall-mounted fresh air units, cabinet fresh air conditioners, and central fresh air systems for homes and commercial buildings. It is also suitable for air conditioning OEMs that integrate fresh air functions into their products. Property developers, facility management companies and HVAC contractors specify this filter for projects where both particulate and odour control are required. The customisation options make it a practical choice for both standard production lines and retrofit applications.
Celrith manufactures this filter in a 50,000 m² production facility that includes six cleanrooms totalling 20,000 m², where HEPA filters are assembled in a dust-controlled environment to avoid secondary contamination. Products comply with REACH and RoHS environmental regulations, and compliance documentation is available upon request. The company holds ISO 9001, ISO 14001 and ISO 45001 certifications, and was awarded IATF 16949 automotive quality management system certification in 2024. Our in-house laboratory is CNAS-accredited and can issue test reports covering filtration efficiency, dust-holding capacity and resistance. With over 20 years of experience in filtration and more than 1,000 filter solutions developed, we support OEM/ODM projects with tailored dimensions, structures, media grades, frame materials, logos and packaging. Multiple automated production lines enable monthly capacity in the millions of pieces, and a three-stage IQC, IPQC, OQC quality control process helps ensure batch-to-batch consistency. Our address is Zhongshan, Guangdong, China.
To receive a tailored quotation for the Celrith Fresh Air / Fresh Air Conditioning HEPA Filter, please provide the following details: your device or vehicle model, required size or drawing, airflow or water flow (if applicable), operating conditions (such as temperature, humidity and contaminant load), and estimated quantity. Our team will respond promptly with a proposal. Contact us to discuss your project.
It removes fine particulate matter such as PM2.5 and pollen through its composite PP media, and adsorbs formaldehyde, TVOCs and odours via the modified activated carbon layer. The dual-action design addresses both solid and gaseous contaminants in one filter stage.
Celrith offers this filter in F7, F8 and F9 (medium efficiency) as well as H11, H12 and H13 (HEPA) grades. The specific grade can be selected based on your air quality requirements and system design.
Yes. We provide full customisation of dimensions, frame type (panel, V-bank or composite), media grade and carbon loading to match your fresh air unit or air conditioner. Our engineering team can work from your drawings or unit specifications.
Under standard fresh air system conditions, the typical replacement interval is 6 to 12 months, depending on outdoor air quality, operating hours and pre-filtration. Using a G4 pre-filter and an F7/F8 medium filter upstream can extend the HEPA filter's life.
The MOQ for standard products is typically 500 to 1,000 pieces; customised products are negotiated based on complexity. Lead time is 7–15 days for standard stock items, 25–35 days for first custom orders, and 15–25 days for repeat orders.
Yes, we welcome sample testing. Standard samples are available quickly, and custom samples typically take 7–15 days to develop. We can include CNAS laboratory test reports covering efficiency, initial resistance and dust-holding capacity with the samples.
Celrith holds IATF 16949 certification (awarded in 2024) and can supply filters for automotive fresh air conditioning systems. We support PPAP documentation and custom structural development for specific vehicle models.
Filters are produced in a 50,000 m² facility with 20,000 m² of cleanrooms, and each batch undergoes IQC, IPQC and OQC inspections. Our CNAS-accredited laboratory performs efficiency, resistance and dust-holding capacity tests to verify performance.