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Ranveth's washable activated carbon odor filter is a composite carbon fabric designed to remove odors and harmful gases such as formaldehyde, benzene, and ammonia. It pairs a high-surface-area activated carbon layer with a flexible polyurethane sponge, giving low airflow resistance and good mechanical strength. This filter is intended for range hoods, integrated stoves, air purifiers, HVAC pre-filtration, and automotive cabin air systems. It suits appliance makers and HVAC suppliers who need reliable odor control with the option to wash and reuse.
The core of this filter is a polyurethane sponge carrier. Activated carbon, in powder or fine granular form, is fixed to the sponge using a curing process. This creates a stable, porous structure where carbon particles are held in place while air passes freely. The sponge contributes flexibility and tear resistance, while the carbon provides adsorption capacity. The combination delivers both initial filtration of larger particles like hair and dust, and adsorption of gaseous pollutants such as formaldehyde, benzene, and ammonia.
Because the carbon is bonded to a sponge rather than sandwiched between separate pleated layers, the filter maintains low airflow resistance. This helps reduce energy use in fans and blowers. The open-cell structure also allows washing with mild detergent and warm water; surface oils and dust can be rinsed away, restoring airflow. However, the adsorption capacity of activated carbon depletes over time, so washing extends airflow performance more than odor removal life. The filter's flexibility allows it to be cut or stamped into complex shapes, fitting tight or irregular spaces in appliances.
| Item | Detail |
|---|---|
| Product name | Washable activated carbon filter (sponge type) |
| Core substrate | Polyurethane sponge |
| Adsorbent | Powdered or fine granular activated carbon, fixed by a curing process |
| Primary function | Initial filtration of large particles (hair, dust) and adsorption of formaldehyde (HCHO), benzene, ammonia, and other harmful gases |
| Physical advantages | Washable and reusable, very low airflow resistance, flexible and easy to cut, excellent air permeability |
| Typical applications | Air purifier pre-filter, fresh air system pre-filter, automotive cabin filter, central AC return air grille, industrial vacuum cleaner |
| Customization | OEM/ODM supported: thickness from 3 mm to 50 mm, pore density (PPI) and outer dimensions to specification, with stamping and forming services |
| Quality system | Produced in a 20,000 m² cleanroom; company certified to ISO 9001, ISO 14001, and IATF 16949 |
This filter is commonly specified for range hoods and integrated stoves, where it captures cooking odors and grease particles. In air purifiers, it serves as a pre-filter that protects the main HEPA stage while adding odor control. Fresh air ventilation systems use it to reduce outdoor pollutants before they enter the living space. Automotive cabin air filters benefit from its compact, flexible form. Central air conditioning return air grilles and industrial vacuum cleaners also use this filter to manage dust and odors. In each case, the washable design reduces replacement frequency and waste.
To start a custom project, please provide the following details:
With these inputs, Ranveth's engineers can recommend the appropriate carbon loading, thickness, and pore density. We also offer prototyping and testing to validate performance.
Ranveth's in-house laboratory is accredited by CNAS (China National Accreditation Service for Conformity Assessment), which means our media choices are backed by test reports for efficiency, dust holding capacity, and airflow resistance. Our production base covers 50,000 m², including six cleanrooms totaling 20,000 m² (together with the cleanroom area mentioned in our quality system, this supports controlled manufacturing). We are certified to IATF 16949 (obtained in 2024) and maintain ISO 9001, ISO 14001, and ISO 45001 systems. Products comply with REACH and RoHS regulations, and we can provide compliance documentation. With over 20 years of experience in filtration and more than 1,000 filter solutions developed, we support OEM/ODM projects from concept to mass production. Our location in Zhongshan, Guangdong, China, positions us well for export to Europe, the US, Japan, and Korea.
We welcome inquiries for samples and pricing. To help us respond quickly, please include the device or vehicle model, required size or drawing, airflow or water flow rate if applicable, operating conditions, and estimated quantity. Send your request through our contact page, and our team will follow up with tailored recommendations.
The filter uses a polyurethane sponge substrate with activated carbon (powder or fine granular) fixed by a curing process. This combination provides both particle filtration and gas adsorption. The sponge gives flexibility and low airflow resistance.
The initial odor removal efficiency can reach over 85% for typical cooking odors. Under normal household use, the recommended service life is 6–12 months. Washing can restore airflow but not fully restore adsorption capacity.
Yes, it is washable with mild detergent and warm water. Washing removes surface oils and dust, improving airflow. However, the activated carbon's adsorption capacity gradually declines, so the filter should be replaced when odor removal drops.
Yes, we offer OEM/ODM customization including thickness (3 mm to 50 mm), pore density (PPI), and outer dimensions. We can stamp or form the filter to fit your specific application. Please provide a drawing or sample.
Standard sizes typically have an MOQ of 1,000–3,000 pieces, while custom OEM projects generally start at 5,000 pieces. Lead time is 25–35 days for standard orders, and custom projects are scheduled based on production capacity.
Yes, we provide standard samples free of charge (freight collect). Custom samples are quoted separately and take 7–15 days. Samples come with CNAS laboratory test reports for performance verification.
The filter is produced in ISO 9001, ISO 14001, and IATF 16949 certified facilities. It complies with REACH and RoHS regulations. We can provide compliance documentation upon request.
Please contact us via our <a href="/en/contact">contact page</a> with your device model, required size or drawing, airflow rate, operating conditions, and estimated quantity. Our team will respond with a tailored quote.