Flat Panel HEPA Activated Carbon Composite Filter

Jyntrel's flat panel HEPA activated carbon composite filter is a thin, dual-layer panel that removes fine particles and odours in one pass through the air path. The HEPA layer captures particulate matter and the activated carbon layer adsorbs formaldehyde, TVOC and odour, making it a fit for household and commercial air purifiers, desktop mini purifiers, humidifier-purifier units and dehumidifiers. It is built for OEM integration, where the panel thickness, face dimensions and frame sealing are matched to the appliance cavity and to the airflow the fan can deliver.

Operating Conditions and Airflow Path

In a compact purifier, the filter sits close to the fan and the available static pressure is limited. A thick, dense element raises resistance and pulls airflow down, so the cabinet may recirculate less air than intended. The flat panel design addresses this by keeping the panel thin and the face area large, so air passes through at low resistance while the appliance keeps its intended airflow and the housing keeps its slim profile.

Two conditions shape the selection. The first is face velocity: a small face area at a given airflow means higher velocity through the media, and the media must be chosen to hold efficiency and pressure drop at that velocity. The second is the duty pattern: continuous operation in a bedroom or intermittent use in a bathroom changes dust loading and the carbon layer's service life. Both are measurable, and both should be settled before tooling.

The carbon stage behaves differently from the HEPA stage. Particulate loading builds gradually and shows up as rising pressure drop, while odour breakthrough depends on the contaminant concentration and the total volume of air processed. In a humid environment such as a combined humidifier-purifier, the carbon should be protected by the panel's structure and the operating data should state the humidity range.

Core Performance

Particle capture is delivered by PP (polypropylene), PP+PET composite or PTFE media. The carbon layer uses quality honeycomb activated carbon or modified aldehyde-removal carbon granules. Efficiency grade and CADR are set by the selected media together with the customer's fan parameters; they are not fixed in advance, because the same media behaves differently at different airflows. Jyntrel confirms the combination against the appliance data rather than quoting a figure out of context.

Commonly specified media support H13-grade performance at 0.3 µm, with H14 available on request. The carbon layer targets formaldehyde, TVOC and odour. The composite therefore handles particles and gases in a single panel, which matters in appliances where two separate filter slots are not available.

The flat structure is the defining trait: low resistance and high use of the space inside the housing. It allows designers to reduce cabinet depth without giving up filter face area, and it suits equipment that runs at modest static pressure. Frame and sealing are made to the customer's cavity, so the panel seats without bypass around the edges.

Selection and Customisation: the Data We Need

Customisation is complete: length, width and thickness are made to the appliance cavity, and the frame and sealing are handled to specification. What we need from you is a short set of operating parameters:

• Appliance or device model, with a drawing or sample of the filter cavity.
• Rated airflow and the fan's available static pressure.
• Target efficiency grade and target CADR, or the target outlet concentration.
• Contaminants to be controlled: dust, pollen, formaldehyde, TVOC, odour.
• Operating conditions: temperature, humidity, continuous or intermittent duty.
• Required service interval and any pressure-drop limit at end of life.
• Frame and sealing requirements, plus annual or per-batch quantity.

With these inputs, media grade and carbon loading are selected so that efficiency, resistance and service life line up with the appliance rather than against it.

Parameters

Typical Applications

The panel is used where space is tight and both particles and odours must be handled. That includes household and commercial air purifiers, desktop mini purifiers, combined humidifier-purifiers and dehumidifiers. In each case the panel is treated as part of the air path: the appliance fan, the cavity depth and the expected contaminant load determine the media grade and carbon charge.

In a mini purifier, the low profile lets the product stay compact without sacrificing face area. In a dehumidifier or humidifier-purifier, the composite handles dust and odour while the appliance manages moisture. When the same platform is sold in several markets, one panel design can be produced to different efficiency grades if the fan and housing allow.

Manufacturing and Testing at Jyntrel

Jyntrel operates multiple automated production lines with monthly capacity in the millions of pieces, and has exported filtration products to Europe, the United States, Japan and Korea for more than 20 years, which supports stable supply across long programmes. Production runs in a 50,000 m² plant in Zhongshan, Guangdong, including 6 clean rooms totalling 20,000 m².

An in-house laboratory accredited by CNAS issues test reports on filtration efficiency, dust holding capacity and resistance, and outgoing batches are controlled for resistance, efficiency and odour-decay indicators. The company holds ISO 9001, ISO 14001 and ISO 45001, and has held IATF 16949 since 2024. Products comply with REACH and RoHS, and compliance documents can be supplied. Quality control runs through IQC, IPQC and OQC.

Share Your Operating Conditions

Send the device or vehicle model, the cavity size or a drawing, the rated airflow or water flow, the operating conditions and your quantity. Our team will propose a media and carbon combination and confirm the specification against your fan curve. Start at our contact page.