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The Thesvin desktop air purifier filter is a HEPA and granular activated carbon (GAC) composite element designed for compact air purifiers, car purifiers, and small fresh-air modules. It captures fine particulate matter such as PM2.5, pollen, and dust while the GAC layer targets formaldehyde, TVOCs, and odours. It is intended for appliance brands and OEM/ODM customers who need a drop-in filter that matches a specific housing or duct. Thesvin manufactures it in Zhongshan, Guangdong, China, with full dimensional customisation.
Fitment starts with the housing, not the media. Thesvin builds each filter to the cavity dimensions you provide: any length, width, height, and thickness, with a sponge sealing edge to close the gap between filter and housing. Common form factors include rectangular flat panels, cylinders, and sector or polygonal shapes for small appliances with irregular air paths. The thin composite construction pairs a pleated HEPA layer with a granular carbon layer so the filter takes up less space inside compact units while still delivering both particle and gas-phase filtration.
For cylindrical filters, the outer diameter and height are matched to the host’s fan shroud and end caps; for flat panels, the frame and gasket are sized to the slot depth. Because Thesvin supports 100% flexible tooling, the filter can follow an existing housing without requiring the device to be redesigned. If you are replacing an old part, the original sample serves as the dimensional reference, and Thesvin will confirm the interface before quoting.
For particles, the filter uses high-precision PP polypropylene, moisture-resistant PP+PET composite, or PTFE microporous membrane. HEPA grades from F7 to H13 are available and are selected against the device airflow and target cleaning performance. The media is pleated to balance efficiency and pressure drop, which matters in small purifiers where fan power is limited.
For gases and odours, the filter is filled with high-iodine-value coconut-shell granular activated carbon or a catalyst-modified carbon for formaldehyde. The carbon is placed directionally where the airflow passes, so the gas phase contacts the carbon before leaving the filter. This dual-action design removes dust and odours in one element, which is useful in desktop and bedside purifiers where space for a separate carbon stage is not available.
| Item | Detail |
|---|---|
| Product name | HEPA & Granular Activated Carbon Filter |
| Particle media | High-precision PP polypropylene / moisture-resistant PP+PET composite / PTFE high-efficiency microporous membrane |
| Gas-phase media | High-iodine-value coconut-shell granular activated carbon / catalyst-modified activated carbon for formaldehyde |
| Particle filtration efficiency | HEPA grade selectable from F7 to H13, customised to device airflow and purification requirements |
| Common forms | Rectangular flat panel, cylindrical, sector and irregular polygonal shapes for small appliances |
| Typical host devices | Desktop/bedside compact air purifiers, car air purifiers, fresh-air ventilation modules, humidifying purifier combos |
| Customisation | 100% OEM/ODM flexible tooling: any length, width, thickness, and sponge sealing edge to match the device air path and structure |
| Quality systems | ISO 9001, ISO 14001, and IATF 16949; CNAS-accredited laboratory testing |
Thesvin operates a 50,000 m² production site in Zhongshan, Guangdong, China, including six clean workshops totalling 20,000 m². The company has held IATF 16949 automotive quality certification since 2024 and also holds ISO 9001, ISO 14001, and ISO 45001. Products comply with REACH and RoHS, and compliance documents can be supplied on request.
Dimensional consistency is controlled through IQC, IPQC, and OQC: incoming media and carbon are checked, in-process pleat and frame dimensions are monitored, and finished filters are inspected before packing. The on-site laboratory is CNAS-accredited and can issue test reports covering filtration efficiency, dust holding capacity, and resistance. With more than 20 years of filter development and manufacturing experience and over 1,000 filter solutions developed, Thesvin supports OEM/ODM orders for size, structure, media grade, frame material, logo, and packaging.
To receive a quotation, send the device or vehicle model, a drawing or the old part, the required size, the airflow or water flow (if relevant), the operating conditions, and the order quantity. Thesvin will confirm fitment and propose the matching HEPA grade and carbon fill. Start here: contact us.
Fitment is confirmed from your device model and cavity dimensions or an old part. Thesvin builds each filter to any length, width, thickness, and form—rectangular, cylindrical, or polygonal—with a sponge sealing edge to close the gap. Send the drawing and the team will verify the interface before quoting.
Yes. An original filter sample is a practical dimensional reference when a drawing is not available. Thesvin measures the sample, confirms the sealing edge and frame thickness, and builds the replacement to match. You can also send both the sample and a drawing for cross-checking.
The HEPA layer is selectable from F7 to H13, with the grade chosen against the device airflow and target cleaning performance. The granular activated carbon handles formaldehyde, TVOCs, and odours. Because the exact efficiency depends on the media grade and housing, Thesvin confirms the specification during sampling and can issue test data from its CNAS-accredited laboratory.
Yes. Thesvin supports 100% OEM/ODM customisation: dimensions, form factor, media grade, carbon type, frame material, logo, and packaging. The thin composite structure is intended for compact units where space is limited. Share the housing constraints and the team will propose a fitment.
Send the device model, drawing or old part, airflow target, operating conditions, and quantity. Thesvin reviews fitment and performance, then quotes and builds a sample to the agreed specification. Sample and tooling costs are confirmed at quotation, and mass-production details follow sample approval.
MOQ and lead time are confirmed per project because they depend on dimensions, media, and order volume. Thesvin’s automated lines support volumes up to millions of pieces per month, and delivery schedules are set at order confirmation. Contact the team with your quantity for a specific answer.
Replacement depends on ambient air quality, daily run time, and contaminant load. Thesvin can integrate an RFID tag or supply data for a host-side timer or pressure-drop signal so end users know when to change the filter. Discuss your preferred replacement indicator during sampling.
