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The Thesvin cylindrical humidifier filter is a self-priming wick filter made from spunlace non-woven fabric, designed to draw water upward and release moisture into the air for cold-evaporation humidifiers and humidifying air purifiers. It filters the water itself, capturing calcium and magnesium ions to help prevent white dust, while its pleated cylindrical structure provides a large evaporation surface. This filter is intended for appliance manufacturers and HVAC equipment suppliers who need a drop-in or custom-fit component for household or commercial humidification systems.
Fitment is the first consideration with any wick filter. The Thesvin cylindrical humidifier filter is built as a self-supporting cylinder that seats into the water tray of a self-priming humidifier or the humidifier module of an air purifier. The pleated fabric wall holds its shape when immersed, so the filter maintains contact with the water supply and keeps the air path open. Because the filter is 100% flexible in dimensions, the outer diameter, inner diameter, height and pleat count can be matched to your existing housing or drawing. This means the filter can be specified to clear the fan shroud, fit the tank collar, and align with the air outlet without modification to the appliance.
The interface that matters most is the water pick-up and the air exit. The spunlace fabric provides a high capillary effect, pulling water up the pleats and releasing it as air passes through. The cylinder geometry ensures that the entire circumference contributes to evaporation, not just a flat face. For OEM projects, Thesvin can also apply an antimicrobial coating or adjust the fabric weight to suit the water quality and duty cycle of your target market.
This is a water-side filter as much as an air-side component. As water is drawn through the spunlace non-woven fabric, calcium and magnesium ions are intercepted within the fiber matrix, which helps reduce the fine white powder often seen when hard water is evaporated. The fabric is also treated with an antimicrobial and anti-mold process to resist the sour odors that can develop in standing water. In practical terms, the filter addresses three things: it wicks water efficiently, it retains mineral scale, and it stays fresher between replacements.
The pleated construction delivers a high evaporation area in a compact cylinder, supporting fast moisture output without a large footprint. The fabric has high wet strength, so it does not soften or collapse during long soaking periods. This is important for self-priming humidifiers where the filter sits partially submerged and must remain upright. The filter does not add chemicals to the water; its function is physical interception and evaporation support.
| Item | Detail |
|---|---|
| Product name | Cylindrical Humidifier Filter / Humidifying Core for Air Purifiers |
| Core filter material | High-absorbency humidifier paper / humidifier polymer fiber / spunlace non-woven fabric |
| Core performance | Strong water absorption and rapid evaporation; intercepts calcium and magnesium ions (helps prevent white dust); long-lasting antimicrobial and anti-mold protection; reduces tank odors |
| Physical structure | Dense pleated construction for large evaporation area; high wet stiffness; resists collapse and delamination during prolonged immersion |
| Main applications | Household cold-evaporation (no-mist) humidifiers; premium air purifiers with humidification; commercial and industrial humidity control equipment |
| Customization | 100% OEM flexible manufacturing. Outer diameter, inner diameter, height, pleat count, and optional composite antimicrobial coating can be produced to your appliance drawing. |
| Quality system | Produced in a 50,000 m² facility; company holds ISO 9001, ISO 14001, and IATF 16949 certification; CNAS-accredited testing laboratory controls quality. |
Thesvin operates under IATF 16949 (achieved in 2024) for automotive-level process discipline, and applies IQC, IPQC, and OQC controls across the production flow. Incoming spunlace fabric is checked for weight and absorbency; in-process inspections monitor pleat geometry and cylinder dimensions; outgoing checks confirm fit-critical dimensions before packing. This dimensional consistency is what allows the filter to drop into automated assembly lines without rework.
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications, and products can be supplied with REACH and RoHS compliance documentation. Manufacturing takes place in Zhongshan, Guangdong, China, in a 50,000 m² plant that includes 20,000 m² of clean rooms across six workshops. A CNAS-accredited laboratory supports filter efficiency, dust-holding, and resistance testing, so performance data can be verified before shipment. With more than 20 years of filtration experience and over 1,000 developed filter solutions, Thesvin supports OEM/ODM projects from initial drawing to stable mass production, with monthly capacity reaching millions of pieces.
To receive a quotation, please share the following: your device or vehicle model, the filter size or a drawing (or an old part for reverse engineering), the required airflow or water flow, operating conditions such as water hardness and duty cycle, and your estimated quantity. With these details we can confirm the fit, propose the fabric specification, and quote MOQ and lead time. Contact our team to start the evaluation.
It can be made to fit if the dimensions match. Thesvin produces the filter to your outer diameter, inner diameter, height, and pleat count, so it seats into the water tray and aligns with the air outlet of your humidifier or purifier. Send a drawing or the old filter and we will confirm the interface before quoting.
Yes. If you do not have a drawing, you can send an old filter and our team will measure the critical dimensions and propose a matching specification. This is common for replacement projects where the original drawing is unavailable.
The filter uses spunlace non-woven fabric with a high capillary effect. It draws water upward and intercepts calcium and magnesium ions to help prevent white dust. An antimicrobial and anti-mold treatment resists sour odors, and the fabric maintains wet strength during long soaking.
Yes, 100% OEM customization is supported. Beyond dimensions, you can specify pleat count, fabric weight, color, and optional antimicrobial coating. Packaging and logo options are also available for private-label programs.
Provide your device model, size or drawing, airflow or water flow, operating conditions, and estimated quantity through our contact page. Standard samples are free with freight collect, and custom samples are typically produced within 7–10 working days after drawing approval.
The MOQ for standard cylindrical humidifier filters is typically 1,000 pieces; custom models are quoted based on tooling and material. Mass production lead time is generally 25–35 days after deposit, with planning available for peak-season or large-volume orders.
Under normal household use of about 8 hours per day, the recommended replacement interval is 3–6 months, depending on local water hardness and usage frequency. The filter can be rinsed with clean water to remove surface minerals, but chemical cleaners are not recommended.
Thesvin holds ISO 9001, ISO 14001, ISO 45001, and IATF 16949 certifications, and production runs in a 50,000 m² facility with CNAS-accredited laboratory testing. Products can be supplied with REACH and RoHS compliance documents for European and North American markets. Contact us with your requirements to confirm the applicable documentation.