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Celrith formaldehyde catalytic filter mesh is an air-treatment filter that destroys formaldehyde and other volatile organic compounds (TVOCs) instead of merely trapping them. Using a high-activity manganese dioxide catalyst (δ-MnO₂ and composite manganese oxides) carried on honeycomb activated carbon, porous ceramic or fibre composite media, it is made for household air conditioners and air purifiers, and for the OEM and ODM programmes of appliance makers. The brand is Celrith, manufactured in Zhongshan, Guangdong, China.
Formaldehyde is a slow-release gas. It comes from pressed wood, adhesives, coatings, textiles and furniture, and it off-gasses for months or years after a room is finished. In a closed room, the concentration can build up even when the air looks and smells clean. TVOCs — solvents, plasticisers and other organic vapours — add to the same load, and odour is often the only signal occupants get.
Conventional adsorbent filters take these gases onto their surface. That works until the pores fill, and when the material is saturated, already-captured molecules can be released back into the airstream as conditions change. For appliance designers, this means the filter's useful life is hard to predict and the end of life can look like the beginning — until the numbers fall away.
A gas filter that only stores contaminants pushes the problem downstream. Saturated media can bleed odour back into the room, and the appliance then runs longer, pulling more air through a loaded filter and raising energy use and fan noise. Service intervals are set by guesswork, so some units are replaced too early while others are left too long.
For the manufacturer, the load is also a design one: the filter has to fit a defined slot, meet a defined airflow, and hold its performance across the temperature and humidity range a real home sees. A passive material that depends on high temperature or an external energy source adds cost and complexity to the appliance. Celrith's approach is to keep the catalyst active at ordinary room conditions and to size the media to the appliance's airflow, so the filter relieves the load rather than adding to it.
The core of the filter is a high-activity manganese dioxide catalyst, δ-MnO₂ and composite manganese oxides. At ambient temperature it catalyses the breakdown of formaldehyde into carbon dioxide and water, so the pollutant is destroyed rather than held. Because the catalyst is not consumed in the reaction, the effect does not taper off in the way a plain adsorbent does, and there is no stored inventory of formaldehyde to be re-released.
No heat, UV or electrical supply is required: the catalyst works at room temperature, which keeps the appliance simple and adds no running energy. The media can be supplied in several carrier forms — honeycomb activated carbon mesh, porous ceramic core and fibre composite filter — so the same chemistry can be matched to different appliance architectures and pressure-drop targets. Formaldehyde clean-air delivery rate (CADR) is quoted at ≥ 300 m³/h and can be customised to the device, while cumulative clean-air delivery (CCM) reaches F4 grade (≥ 1500 mg) in a long-life design. The recommended working range is 5 °C to 50 °C and 30%–90% RH, and the suggested service life is 12 to 36 months depending on pollutant concentration.
| Item | Detail |
|---|---|
| Core catalytic material | High-activity manganese dioxide (δ-MnO₂) / composite manganese oxides |
| Formaldehyde CADR | ≥ 300 m³/h; customisable to the device |
| Cumulative clean-air delivery (CCM) | F4 grade (≥ 1500 mg), long-life design |
| Recommended operating conditions | Temperature 5 °C–50 °C; humidity 30%–90% RH |
| Suggested service life | 12–36 months, depending on pollutant concentration |
| Carrier forms | Honeycomb activated carbon mesh, porous ceramic core, fibre composite filter |
Celrith catalytic mesh is used in household air conditioners and air purifiers, and in OEM/ODM builds where the filter is part of another brand's appliance. Typical users are appliance manufacturers designing a formaldehyde or TVOC stage into a new unit, and buyers sourcing replacement media for an existing platform. Because the carrier form and dimensions are customisable, the filter suits compact wall-mounted units as well as larger floor-standing purifiers.
For products intended for export, the mesh can be supplied to meet the REACH and RoHS environmental requirements, with compliance documents available on request.
Celrith products are made to REACH and RoHS environmental requirements, with compliance documentation available. The company holds ISO 14001 and ISO 45001 certification, and its own laboratory is CNAS-accredited and can issue reports covering filtration efficiency, dust holding capacity and resistance.
The manufacturing base covers 50,000 m², including six cleanrooms totalling 20,000 m². Celrith has held IATF 16949 automotive quality management certification since 2024, and quality control runs through IQC, IPQC and OQC. With more than 20 years of filter development and manufacturing, and more than 20 years of continuous export to Europe, the United States, Japan and South Korea, the company has developed over 1,000 filtration solutions and runs multiple automated lines with monthly output in the millions of pieces.
To get an accurate quotation, tell us the device or vehicle model the filter will serve, the size or a drawing, and the airflow the unit is designed for. Please also describe the operating conditions (temperature, humidity, expected pollutant level), the quantity you need and whether you require OEM/ODM customisation of dimensions, structure, media grade, frame, logo or packaging. Send these details through our contact page and the team will respond.
The Celrith catalytic mesh targets formaldehyde and other volatile organic compounds (TVOCs) in the airstream. Its manganese dioxide catalyst breaks formaldehyde down into carbon dioxide and water at room temperature rather than storing it. It is designed for air conditioners and air purifiers, and performance can be matched to the device's airflow.
No. The catalyst destroys formaldehyde through a catalytic reaction instead of adsorbing it, so there is no stored pollutant to be re-released. This is why the long-life design can carry an F4 CCM grade (≥ 1500 mg) without the rebound seen with saturated adsorbents.
The formaldehyde CADR is ≥ 300 m³/h, and it can be customised to the appliance's airflow and pressure-drop requirements. Carrier options include honeycomb activated carbon mesh, porous ceramic core and fibre composite media. Share the target figures with us and we will propose a matching build.
Yes. Sizes and structures are customisable, as are media grades, frame material, logo and packaging under our OEM/ODM programme. Provide a drawing or the slot dimensions and the airflow of the unit, and the filter can be specified to fit.
Yes. Send the device or vehicle model, size or drawing, airflow, operating conditions and quantity through our contact page. The team will confirm the sample arrangement and prepare a quotation based on those details.
MOQ and lead time depend on the specification and the order volume, and are confirmed with the quotation for this product. Because dimensions and media are customisable, the production plan is set per project. Please include your quantity target when you enquire so we can advise accurately.
The suggested service life is 12 to 36 months, depending on the pollutant concentration in the room. The filter is designed to work between 5 °C and 50 °C and 30%–90% RH. In heavily polluted spaces, replacement should follow the shorter end of that range.
The product is made to meet REACH and RoHS environmental requirements, and compliance documents can be provided. Manufacturing is covered by ISO 14001 and ISO 45001, and the CNAS-accredited laboratory can issue reports on filtration efficiency, dust holding capacity and resistance. Contact us to discuss the documents you need.
