Formaldehyde Catalytic Filter Mesh

This is a catalytic filter mesh that decomposes formaldehyde at room temperature using high-activity manganese dioxide, available from Ranveth in Zhongshan, Guangdong, China. It is designed for air purifiers and residential air-conditioning systems that need continuous formaldehyde and TVOC removal without rebound. The mesh is suited to appliance makers and HVAC brands looking for a test-backed, long-life filtration component.

Media Pairing and Layer Build

The performance of this filter comes from how the catalytic media is paired with the carrier structure. The active component is high-activity manganese dioxide (δ-MnO₂) or a composite manganese oxide, chosen for its ability to oxidise formaldehyde at ambient temperatures. This media is deposited onto one of three carrier forms: honeycomb activated carbon mesh, porous ceramic core, or fibre composite mesh. Each carrier offers a different balance of surface area, airflow resistance and mechanical strength.

In a typical build, the catalytic layer is supported by a substrate that provides a high surface area for contact between the pollutant and the catalyst. The honeycomb activated carbon carrier, for example, gives a high loading of catalytic material per unit volume while keeping pressure drop low enough for residential air movers. The porous ceramic core is suited to applications where durability and resistance to moisture are important. The fibre composite mesh offers flexibility in shape and can be integrated into pleated or flat filter assemblies.

This pairing directly influences efficiency, airflow resistance and service life. A well-matched carrier ensures that the catalyst is accessible to the air stream, maximising the decomposition rate of formaldehyde. At the same time, the open structure of the carrier keeps resistance within the capability of standard fans. The choice of carrier also affects how the filter handles dust and humidity over time, which in turn determines its useful life. Ranveth works with customers to select the right combination based on their device's airflow, space constraints and target lifetime.

Specification Sheet

Where It Is Used

The filter is primarily used in household air conditioners and air purifiers. In air conditioners, it is integrated into the return air path to reduce formaldehyde emitted from building materials and furnishings. In air purifiers, it is often combined with particulate filters to provide comprehensive air cleaning. The catalytic action is continuous and does not require regeneration or power, making it suitable for devices that operate intermittently or continuously. Because the media decomposes formaldehyde rather than merely adsorbing it, there is no risk of re-release, which is a concern with purely adsorptive media.

What to Send Us for a Custom Build

To develop a custom filter for your device, please provide the following information:

• Device or vehicle model, if applicable
• Required dimensions or a drawing of the filter envelope
• Airflow rate (m³/h) or water flow rate, as relevant
• Operating conditions: temperature, humidity, and any exposure to dust or chemicals
• Estimated annual quantity

With these details, our engineering team can recommend the appropriate carrier form, catalyst loading, and filter geometry to meet your performance and lifetime targets. We can also provide samples for evaluation.

Why Source from Ranveth

Ranveth operates its own laboratory accredited by CNAS (China National Accreditation Service for Conformity Assessment), which can issue test reports for filtration efficiency, dust holding capacity, and resistance. This means the media pairing and layer build we propose are backed by measured data, not assumptions. Our production base covers 50,000 m², including six cleanrooms totalling 20,000 m², and is certified to IATF 16949 (achieved in 2024) as well as ISO 9001, ISO 14001, and ISO 45001. Products comply with REACH and RoHS, and we can supply compliance documentation. With over 20 years of filtration experience and exports to Europe, the US, Japan, and Korea, we have developed more than 1,000 filtration solutions. Our automated lines support monthly capacities in the millions of pieces, and quality control covers IQC, IPQC, and OQC.

Request Samples and a Quote

To discuss your requirements, please send us your device model, size or drawing, airflow or water flow, operating conditions, and quantity. Our team will respond with a tailored proposal. You can reach us through our contact page.