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The Thesvin Fresh Air HVAC HEPA Filter is a composite filter that combines polypropylene (PP) media with modified activated carbon to capture fine particles and adsorb odours. It is designed for fresh air systems, fresh air air conditioners, and central HVAC systems, filtering PM2.5, pollen, dust, formaldehyde, and TVOC. This filter is intended for HVAC engineers, appliance manufacturers, and distributors who need a drop-in or custom-fit filtration solution with documented efficiency grades from F7 to H13.
Fitment is the first consideration in any air filter project. The Thesvin filter is built to match the host unit’s physical interface: the frame, dimensions, and media pleating are configured to the drawing or sample you provide. Whether the filter is a flat panel, a V-bank, or a composite assembly, the goal is to locate correctly in the existing slot, seal against the housing, and maintain the intended airflow path without bypass.
Because every fresh air system has its own tolerances, we manufacture to your specified dimensions. This means the filter’s outer frame, thickness, and pleat count are not generic off-the-shelf values but are set to your unit’s requirements. The composite structure combines a PP media layer for fine particle capture and an activated carbon layer for odour and gas removal within the same envelope. The filter can be supplied in flat, V-shaped, or composite configurations to suit different installation spaces.
For OEM and ODM projects, we work from 2D drawings or 3D models to ensure the filter interfaces correctly with the housing. The frame material, pleat height, and gasket (if specified) are all defined during the design phase, so the finished part is a direct fit. If you are replacing an existing filter, sending us the old part is often the fastest way to replicate the geometry and sealing characteristics.
Correct fitment also affects performance. A filter that is too small or has an inadequate seal will allow unfiltered air to bypass the media, reducing overall efficiency. By matching the filter’s dimensions and frame to the host unit, we help ensure that the rated efficiency is achieved in service. This is particularly important in fresh air systems, where even small leaks can compromise indoor air quality.
The Thesvin Fresh Air HVAC HEPA Filter provides two-stage filtration in a single product. The composite PP media captures fine particulate matter such as PM2.5, pollen, and dust. The modified activated carbon layer adsorbs odours, formaldehyde, and TVOC, helping to improve indoor air quality in residential and commercial spaces.
The filter is available in efficiency grades from F7/F8/F9 (medium efficiency) up to H11/H12/H13 (HEPA). This range allows specifiers to select the appropriate level for the application. For example, H11 to H13 grades are suitable for applications requiring high particle removal, while F7 to F9 grades may be used in less demanding situations or as pre-filters. The activated carbon layer targets gaseous contaminants that particulate filters alone cannot remove, making the filter a dual-function solution.
Typical applications include wall-mounted fresh air units, cabinet-style fresh air air conditioners, and central fresh air systems in homes, offices, and commercial buildings. The filter is not intended for use in environments with high concentrations of corrosive gases or where the activated carbon may be quickly exhausted. For such cases, a different filter configuration may be recommended.
| Item | Detail |
|---|---|
| Product name | Fresh Air System / Air Conditioner Composite Filter |
| Core filter media | Composite polypropylene (PP) filter paper + modified activated carbon for odour removal |
| Particle filtration efficiency | Available in F7 / F8 / F9 (medium efficiency) up to H11 / H12 / H13 (HEPA) grades |
| Core performance | Dual function: removal of fine particulate matter (PM2.5, pollen) and deep adsorption of formaldehyde, TVOC, and 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 units, cabinet-style fresh air air conditioners, residential and commercial central fresh air systems (HVAC) |
| Custom dimensions and specifications | Tooling and production fully according to customer’s unit requirements (flat panel, V-shaped pleated, or composite types available) |
| Quality and certification | Each filter undergoes rigorous air resistance and filtration efficiency testing before shipment. Production complies with ISO 9001 quality management system and IATF 16949 international certification. Materials are environmentally safe. |
Note: Dimensions are customised to your drawing or sample. Please provide the required size, frame type, and efficiency grade when requesting a quote.
Following these steps helps ensure that the final filter matches your unit’s fitment and performance requirements. For complex projects, our engineers can assist with design-for-manufacture recommendations.
Thesvin operates a 50,000 m² manufacturing facility in Zhongshan, Guangdong, China, which includes six clean rooms totalling 20,000 m². Production is managed under ISO 9001, ISO 14001, and ISO 45001 systems. In 2024, we obtained IATF 16949 certification, reflecting our commitment to quality in automotive and similar demanding industries.
Quality control follows a three-stage process: incoming material inspection (IQC), in-process inspection (IPQC), and outgoing quality control (OQC). Each filter is tested for air resistance and filtration efficiency before shipment. Our in-house laboratory is CNAS-accredited and can issue test reports for filtration efficiency, dust holding capacity, and pressure drop, providing documented evidence of performance.
We have over 20 years of experience in filter development and manufacturing, and our products are exported to Europe, the United States, Japan, and South Korea. We support OEM/ODM projects with custom dimensions, structures, media grades, frame materials, logos, and packaging. Our cumulative experience covers more than 1,000 filter solutions, and our automated production lines can achieve monthly output in the millions of pieces.
Standard lead times are 15–25 days for standard specifications and 30–45 days for customised products (including tooling). Minimum order quantities (MOQ) are typically 500–1,000 pieces for standard items and 1,000–3,000 pieces for customised items, depending on specifications and packaging. Please confirm details with our sales team for your specific project.
To receive an accurate quote, please provide the following information:
Our engineering team will review your requirements and respond with a proposal, including recommended specifications and pricing. Contact us today to discuss your fresh air filter needs.
Yes—every Thesvin fresh air filter is made to your unit’s dimensions. We work from your drawing or an old part to match the frame, pleat count, and sealing interface. This ensures the filter locates correctly and maintains the intended airflow path without bypass.
Absolutely. Sending an old filter is often the fastest way to replicate geometry. We measure the sample and produce a prototype for your approval before production. This approach is common for replacement filters and ensures a precise fit.
The filter is available in F7, F8, and F9 (medium efficiency) as well as H11, H12, and H13 (HEPA) grades. The choice depends on your required particle removal level and acceptable pressure drop. We can advise on the appropriate grade for your application.
The modified activated carbon adsorbs odours, formaldehyde, and TVOC. It is combined with PP media in a composite structure, providing dual-function filtration in a single filter. This helps improve indoor air quality beyond particle removal alone.
MOQ is typically 500–1,000 pieces for standard specifications and 1,000–3,000 pieces for customised filters, depending on size and packaging. Please confirm with our sales team for your specific requirements.
Standard products ship in 15–25 days. Customised filters, including tooling, require 30–45 days. We will confirm the schedule based on your order details and current production capacity.
Yes. We provide samples for testing. Standard samples are free, with freight collected. Custom samples may incur a development fee, which is refundable against a bulk order. Contact us to request your sample.
Replacement interval depends on operating conditions and runtime. In typical residential use, we recommend every 6–12 months. For demanding environments, more frequent changes may be needed. Monitor pressure drop or follow your maintenance schedule.
