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Celrith flat panel HEPA activated carbon composite filters are slim, dual-layer air filters that capture fine particulate matter and adsorb odours and gases in one unit. They are designed for residential and commercial air purifiers, desktop units, humidifier-purifier combinations, and dehumidifiers. The flat panel format maximises space inside the device while keeping airflow resistance low.
Indoor air carries two distinct loads: particles and gases. Particles such as PM2.5, pollen, dust mites, and bacteria circulate continuously and settle on surfaces and heat exchangers. Gases and odours—formaldehyde, TVOCs, cooking smells, and pet odours—are harder to see but often more persistent. A single-layer filter usually addresses one load well and the other poorly. The result is either a device that traps dust but leaves odours, or one that adsorbs gases but lets fine particles pass.
This composite filter tackles both loads in a flat, space-saving package. The HEPA layer is built from PP, PP+PET composite, or PTFE media, selected according to the required dust removal efficiency. The carbon layer uses high-quality honeycomb activated carbon or modified formaldehyde-removal carbon granules. Together they reduce the particle and gas burden on the equipment and on the people using it.
When particles build up on a filter, airflow drops and the fan must work harder, which increases energy consumption and noise. In purifiers and dehumidifiers, restricted airflow also reduces the effective clean air delivery rate (CADR). Gaseous contaminants do not clog the filter in the same way, but they saturate the carbon over time, after which odours pass through and the filter no longer performs its gas-removal function.
In compact devices—desktop purifiers, humidifier-purifier combinations, and slim dehumidifiers—space is at a premium. Thick filters force design compromises or reduce the filter area available for airflow. A flat panel design allows the filter to sit close to the housing, freeing volume for other components and keeping the air path short and efficient. This reduces the pressure drop across the filter and helps the device maintain its intended performance.
Celrith addresses both contaminant loads with a composite construction that combines HEPA media and activated carbon in a single flat panel. The HEPA layer captures fine particles, while the carbon layer adsorbs odours and gases. Because the filter is flat and thin, it minimises airflow resistance and allows high utilisation of the device interior space.
The filter media and carbon type are selected to match the device's fan specifications and the target CADR. Celrith offers PP, PP+PET, and PTFE media options, as well as standard honeycomb activated carbon or modified carbon for formaldehyde removal. This flexibility allows manufacturers to balance efficiency, airflow, and cost for their specific application.
Customisation is central to the design. Celrith supports 100% OEM specifications, meaning dimensions, thickness, and frame sealing can be tailored to the device cavity. Whether the requirement is a very thin panel for a desktop unit or a larger format for a commercial purifier, the filter can be built to suit. This approach helps device makers achieve their desired filtration performance without redesigning the housing.
| Item | Detail |
|---|---|
| Product name | Flat Panel HEPA & Carbon Composite Filter |
| Physical structure | Max flat design, very low airflow resistance, high space utilisation |
| Core dust removal media | PP (polypropylene) / PP+PET composite / PTFE (polytetrafluoroethylene) |
| Core odour removal material | High-quality honeycomb activated carbon / modified formaldehyde-removal carbon granules |
| Filtration performance | Dust removal grade and CADR value depend entirely on selected media and customer device fan parameters |
| Main end applications | Residential/commercial air purifiers, desktop micro purifiers, humidifier-purifier combinations, dehumidifiers |
| Customisation | 100% OEM flexible customisation. Any length, width, thickness, and frame sealing per customer cavity requirements. |
| Quality certification | ISO 9001, ISO 14001, and IATF 16949 certified. CNAS-accredited testing centre; factory controls airflow resistance, efficiency, and odour removal decay. |
This filter is used by manufacturers of residential and commercial air purifiers, desktop micro purifiers, humidifier-purifier combinations, and dehumidifiers. It suits appliances where both particle and odour removal are required, and where internal space is limited. Brands looking for a slim filter that maintains airflow while delivering dual-function filtration will find this composite panel a practical fit. It is also suitable for OEM projects where the filter must match a specific cavity and performance target.
Celrith meets REACH and RoHS environmental compliance requirements and can provide the relevant documentation. The company holds ISO 14001 and ISO 45001 certifications, reflecting its commitment to environmental and occupational health and safety management. For product verification, Celrith operates a CNAS-accredited laboratory that can issue test reports on filtration efficiency, dust holding capacity, and airflow resistance.
Manufacturing takes place in a 50,000 m² plant, which includes 20,000 m² of cleanroom space across six cleanrooms. Celrith is also IATF 16949 certified (2024), demonstrating automotive-level quality management. These resources support consistent production and reliable supply for OEM projects. With over 20 years of filtration experience and exports to Europe, the US, Japan, and South Korea, Celrith combines scale with custom engineering capability.
To get an accurate quotation for your application, please provide the following details: your device or vehicle model, required filter size or a drawing, airflow or water flow specification, operating conditions, and estimated quantity. This information helps Celrith recommend the right media and configuration for your product. Contact our team to start the conversation.
It removes fine particulate matter such as PM2.5, pollen, dust mites, and bacteria through its HEPA layer, and adsorbs odours, formaldehyde, and TVOCs through its activated carbon layer. The exact efficiency depends on the media selected and the device's fan parameters. For specific removal rates, please consult us with your requirements.
Yes, Celrith offers 100% OEM customisation. We can adjust length, width, thickness, and frame sealing to match your device cavity. Media type (PP, PP+PET, PTFE) and carbon type can also be selected to meet your performance and cost targets.
Provide your device model, required dimensions or drawing, airflow specification, operating conditions, and estimated quantity via our contact page. We will recommend a configuration and provide a quotation. Samples can be arranged for performance evaluation.
MOQ depends on the customisation level. Standard configurations typically start at 500–1,000 pieces, while fully custom sizes may require 2,000–3,000 pieces. Please confirm with our sales team for your specific project.
Standard lead time is 25–35 days after order confirmation, depending on quantity and customisation. Sample lead time is 7–10 days. We will confirm the schedule when you place an inquiry.
Replacement frequency depends on usage and contaminant levels. For typical residential use, we recommend replacing the filter every 6–12 months. In high-dust or high-odour environments, more frequent changes may be needed. Monitoring airflow and odour removal can help determine the right interval.
Yes, the filter is suitable for use in air purifiers, dehumidifiers, and humidifier-purifier combinations. The media and carbon are selected to maintain performance across a range of operating conditions. For specific humidity requirements, please share your operating conditions with us.
Celrith holds ISO 9001, ISO 14001, ISO 45001, and IATF 16949 certifications. Products comply with REACH and RoHS, and testing is performed in a CNAS-accredited laboratory. Documentation can be provided upon request.