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The Thesvin Flat Panel HEPA Filter (MAX Series) is an ultra-thin flat panel HEPA filter built to sit inside tight equipment envelopes such as air purifiers, dehumidifiers and robot exhaust ducts. It removes sub-micron particulate from the airstream, with efficiency determined by the media grade selected, from E11 up to H14/U15. It is made for appliance and equipment manufacturers, OEM/ODM brand owners and HVAC integrators who need the filter to match an existing housing rather than adapt the housing to a standard canister. Thesvin manufactures it in Zhongshan, Guangdong, China.
The MAX series is defined by its flat profile: a low-resistance panel that uses the space available rather than a deep pleated pack. That matters where the filter is a design constraint — inside a tabletop purifier, a combined humidifier-purifier, a dehumidifier or the exhaust path of a robot vacuum, the filter thickness, outline and sealing face decide how much product space is left for the fan, duct and electronics.
Because every unit is made to the customer's drawings, fitment is treated as a dimensional and sealing problem first. The panel outline, thickness and encapsulation process are produced to the host design, so the filter seats against the surface the equipment provides. Thesvin's engineering team works from your whole-machine drawing to set the panel geometry and the way the edge is encapsulated, then confirms the result against the housing interface before performance targets are locked in.
From a structural standpoint, a flat panel has to stay flat. An uneven or over-thick panel will not seat, and a panel that deflects under airflow can bypass at the perimeter. The MAX series addresses this through the flat construction itself and through process control on the encapsulated edge, which is why dimensional checks are part of the IQC, IPQC and OQC sequence rather than a final visual pass. If your unit has an existing filter pocket, gasket land or retention feature, send that geometry and the panel will be built to it.
The MAX series captures sub-micron particles from the air passing through the panel. Media choice drives both what the filter does and how it behaves in service. The available options are PP (polypropylene melt-blown), PP+PET composite moisture-resistant media, and PTFE membrane.
Efficiency follows the media grade, spanning sub-high-efficiency (E11) through ultra-high-efficiency (H14/U15). Resistance and dust holding capacity are balanced through a low-initial-resistance design that keeps a large dust load capacity, which extends service life between replacements. The result is a panel that filters fine particulate without imposing avoidable pressure drop on a small blower.
The table below summarises the published specification. Dimensions and encapsulation are made to your drawing; the figures shown are the programme parameters, not a fixed catalogue size.
| Item | Detail |
|---|---|
| Product name | Flat Panel HEPA Filter — MAX Series |
| Physical structure | MAX flat-panel format, low air resistance, high space utilisation |
| Filtration media | PP (polypropylene melt-blown) / PP+PET composite moisture-resistant media / PTFE membrane |
| Filtration efficiency | From sub-high-efficiency (E11) to ultra-high-efficiency (H14/U15); efficiency depends entirely on the selected media grade |
| Resistance and dust holding | Low initial resistance through optimised fluid dynamics, with large dust holding capacity to extend service life |
| Typical applications | Household and commercial air purifiers, desktop compact purifiers, combined humidifier-purifiers, dehumidifiers, robot vacuum exhaust outlets |
| Size and specification customisation | 100% OEM/ODM flexible customisation; any length, width, thickness and encapsulation process can be produced to the customer's whole-machine design drawing |
| Quality systems | Production certified to ISO 9001, ISO 14001 and IATF 16949; CNAS-recognised testing centre; air resistance, leak testing and efficiency indicators controlled before shipment |
Dimensional consistency is the core of panel filter quality, because a filter that does not seat is a filter that bypasses. Thesvin holds IATF 16949 certification, obtained in 2024, and runs IQC, IPQC and OQC control across the production flow so that incoming media, in-process encapsulation and outgoing panels are each checked against specification.
The company's own laboratory is accredited by CNAS (China National Accreditation Service for Conformity Assessment) and can issue test reports covering filtration efficiency, dust holding capacity and resistance. The manufacturing site covers 50,000 m², of which six clean workshops account for 20,000 m². The plant operates under ISO 9001, ISO 14001 and ISO 45001 management systems, and products meet REACH and RoHS requirements with compliance documentation available. With more than 20 years of filtration development and manufacturing, and continued exports to Europe, the United States, Japan and South Korea for over 20 years, Thesvin has built more than 1,000 filtration solutions. Multiple automated production lines support output in the millions of pieces per month. OEM/ODM covers size, structure, media grade, frame material, logo and packaging. The factory is located in Zhongshan, Guangdong, China.
To get a quotation for the MAX series flat panel HEPA filter, send the device or vehicle model, the panel size or drawing (an old part is acceptable), the airflow or water flow of the unit, the operating conditions, and the quantity you expect to order. The engineering team will confirm media grade and encapsulation and return a proposal. Contact Thesvin to start.
The MAX series is made to your whole-machine drawing, so the panel outline, thickness and encapsulation are produced to the interface your housing provides. Send the filter pocket dimensions or the old part and the fitment is built from that geometry rather than from a catalogue size. Fit is confirmed on a sample before production.
Efficiency depends on the media grade selected, spanning sub-high-efficiency E11 through ultra-high-efficiency H14/U15. Media options are PP melt-blown, PP+PET composite moisture-resistant media and PTFE membrane. Tell us the grade you need and the airflow, and the media selection follows.
Yes. For retrofits and existing appliances, a physical sample of the old filter is often faster and more reliable than a drawing. The team measures it and builds the new panel to match the housing interface. Drawings are welcome where a new unit is still in design.
OEM/ODM covers size, structure, media grade, frame material, logo and packaging, and 100% flexible customisation is supported. Thesvin has developed more than 1,000 filtration solutions, which shortens the path from your requirement to a workable design.
Send the device model, size or drawing, airflow, operating conditions and expected quantity, and the team returns a proposal. A sample is then built against your geometry and duty for validation in the unit. <a href="/en/contact">Contact Thesvin</a> with those details to begin.
MOQ, lead time and sample policy for the flat panel HEPA filter are set per project according to size, structure and media grade, so they are confirmed in the quotation rather than fixed in advance. Provide your expected quantity with the drawing and the team will state both.
Replacement interval depends on the dust load the unit sees and the media grade chosen; the low-resistance, high-dust-holding design is intended to extend service life. Because duty varies by application, confirm the interval with Thesvin against your operating conditions.
Thesvin's own laboratory is accredited by CNAS and can issue reports on filtration efficiency, dust holding capacity and resistance. Air resistance, leak testing and efficiency indicators are controlled before shipment. Request the reports with your enquiry.