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Contact The Oltaven rotary humidifier filter is a self-priming evaporative filter made from spunlace fabric, designed to replace the wicking wheel in cold-evaporation humidifiers. It filters out…
FILTER MEDIA / ROLLS · SHEETS · DIE-CUT
The Oltaven rotary humidifier filter is a self-priming evaporative filter made from spunlace fabric, designed to replace the wicking wheel in cold-evaporation humidifiers. It filters out calcium and magnesium ions from water to prevent white powder, resists bacterial and mould growth, and is built for long-term rotation in the water tank. It is intended for humidifier OEMs, air purifier brands with integrated humidification, and commercial HVAC humidification modules.
At Oltaven, we do not stop at supplying media. The finished filter is the result of combining the right fabric with precise pleating, framing, and sealing. The spunlace fabric provides the capillary structure that draws water upward and releases it as vapour. How that fabric is formed into a rotary wheel determines how evenly water is distributed, how much air can pass, and how long the filter lasts. Our engineers work with you to select the material grade and then design the frame, hub, and gear ring to match your device. This integrated approach is why our filters deliver consistent performance from the first unit to the millionth.
Three factors govern the efficiency, resistance, and capacity of a rotary humidifier filter: media choice, forming, and sealing.
Media choice. We use high-absorption humidifier paper or polymer humidifier fibre. The fibre's diameter, pore size, and surface treatment affect how quickly water wicks and how much mineral content is trapped. For applications where white powder is a concern, we can specify a media that physically blocks calcium and magnesium ions, so only pure water vapour is released.
Forming. The fabric is pleated or wound into a rotary shape. The pleat height, pitch, and overall diameter set the surface area available for evaporation. More area means higher capacity but also higher resistance if airflow is restricted. Our forming process includes a stiffness-enhancing treatment that gives the filter high wet stiffness, so it does not soften or collapse after prolonged immersion and rotation.
Sealing and framing. The frame, centre hub, and gear ring are injection-moulded to your drawing. A precise seal prevents water from bypassing the media and ensures that all air passes through the evaporative surface. We also apply antimicrobial and anti-mould treatments during finishing, which inhibit bacterial growth and keep the tank odour-free.
By controlling these three elements together, we can tune the finished filter for your target humidification rate, noise level, and service life. This is why two filters of the same size can perform very differently.
Oltaven rotary humidifier filters are used in:
Because every device has its own water tank, fan, and space constraints, we customise the filter's dimensions, hub interface, and fabric grade to match your unit.
| Item | Detail |
|---|---|
| Product name | Rotary Humidifier Filter / Humidifier Wheel Filter / Evaporative Humidifier Filter |
| Core filtration and humidification material | High-absorption humidifier paper / polymer humidifier fibre |
| Core purification and humidification performance | Physical interception of calcium and magnesium ions (no white powder evaporation), strong capillary water absorption for rapid evaporation, long-term inhibition of bacteria and mould |
| Physical structure and mechanical advantages | Special stiffness-enhancing treatment, very high wet stiffness, does not soften or fall apart after long-term immersion and rotation in the water tank |
| Main application end products | High-end cold-evaporation mist-free humidifiers, air purifiers with humidification modules, industrial constant-temperature and constant-humidity air handling units |
| Outer frame and size customisation | 100% OEM flexible customisation according to customer's complete device drawings. Injection-moulded plastic gear ring, centre shaft interface, humidification area and thickness can all be tooled and manufactured |
| Quality certification system | Production relies on the company's 50,000 m² clean plant and national CNAS testing centre verification. The company has passed ISO 9001, ISO 14001, and IATF 16949 international quality management system certifications |
Oltaven brings over 20 years of filter development and manufacturing experience to every project. We have developed more than 1,000 filtration solutions for customers worldwide, and our OEM/ODM capability covers size, structure, filter grade, frame material, logo, and packaging. Our 50,000 m² plant in Zhongshan, Guangdong, includes six cleanrooms totalling 20,000 m², and our in-house laboratory is CNAS-accredited, so we can issue test reports for efficiency, dust holding capacity, and resistance. We are certified to IATF 16949 (obtained in 2024), ISO 9001, ISO 14001, and ISO 45001, and our products comply with REACH and RoHS regulations. With multiple automated production lines, we can reach a monthly capacity of several million pieces. Our IQC, IPQC, and OQC processes ensure consistency from incoming material to finished filter. We have been exporting to Europe, the United States, Japan, and South Korea for over 20 years.
Starting a custom project with Oltaven is straightforward:
Throughout the process, you have a single point of contact and access to our lab for performance verification.
To receive a tailored proposal, please provide the following details:
Our team will respond with a recommendation and quotation. We look forward to partnering with you. Contact us to get started.
Resistance is determined by media choice, pleat geometry, and sealing quality. A denser fabric or a tighter pleat pitch increases surface area and capacity but can also raise resistance. Our engineers balance these factors during forming to match your device's airflow.
An OEM project starts with your inquiry, including device model, drawings, airflow or water flow, operating conditions, and quantity. We then propose a material and design, provide samples for testing, and proceed to tooling and mass production after approval.
Lead time depends on the project stage. Samples are usually available within 2-3 weeks. After sample approval, mass production typically takes 4-6 weeks, plus tooling time if new moulds are required. We confirm the schedule in your quotation.
For standard sizes, the MOQ is 1,000 pieces. For custom sizes or new tooling, the MOQ is typically 3,000 pieces. We can discuss specific requirements based on your project.
Yes, we provide samples for evaluation. For standard sizes, samples are free, and you cover the freight. For custom designs, a sampling fee applies, which is refundable against a bulk order.
Under normal household use (8 hours per day with pure or soft water), we recommend replacing the standard spunlace filter every 3-6 months. Upgraded antimicrobial versions can last 6-12 months. Actual life depends on water quality and usage.
Our production is backed by ISO 9001, ISO 14001, ISO 45001, and IATF 16949 certifications. Our CNAS-accredited laboratory can provide test reports for efficiency, resistance, and other parameters. Products comply with REACH and RoHS.
To request a quote, please provide your device model, required dimensions or drawing, target airflow or water flow, operating conditions, and estimated quantity through our contact page. Our team will respond promptly with a tailored proposal.