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The Thesvin cylindrical humidifier filter (water spray type) is a pleated, honeycomb-structured cylinder that fits into water-spray humidifiers and humidifying air purifiers. It draws water up by capillary action and releases moisture as air passes through, while trapping calcium and magnesium ions to reduce white dust. It is designed for appliance makers and HVAC equipment suppliers who need a drop-in filter that matches the host unit’s bore, height and pleat count.
In a water-spray humidifier the filter sits in the water tray and is located by the appliance’s own carrier or centre support. The critical fitment dimensions are the outside diameter, the inside diameter, the overall height and the pleat count; these determine whether the cylinder seats without binding, whether water can rise evenly through the pleated wall, and whether the air path remains sealed at the top and bottom faces. Thesvin manufactures to your drawing, so the cylinder is built to the interface you specify rather than to a nearest stock size.
The pleated honeycomb wall gives a large evaporation surface in a compact envelope, and the paper or fibre is chosen for wet stiffness so the cylinder keeps its shape during long immersion. Because the frame and dimensions are made to your drawing, the filter can be matched to the tray depth and to the air outlet geometry of the host device. If you are replacing an existing part, the old filter itself can serve as the dimensional reference.
The primary duty is water: the filter draws water upward through capillary action and releases it as vapour into the airstream. In doing so it intercepts calcium and magnesium ions from the water, which is the mechanism behind reduced white-powder carry-over. The media is treated for long-term antibacterial and anti-mould performance, which helps prevent the sour, stale odour that can develop in water tanks. Airborne dust and lint are also held on the wet media surface as air moves through the pleats.
Typical host equipment includes household evaporative (no-mist) humidifiers, premium air purifiers with a humidifying function, and industrial constant-temperature and constant-humidity equipment. The filter is intended for the water-spray section of these machines; it is not a replacement for a HEPA stage or a carbon stage elsewhere in the appliance.
| Item | Detail |
|---|---|
| Product name | Cylindrical humidifier filter / humidifying core for air purifiers |
| Core humidification material | High-absorption humidifier paper or polymer humidifier fibre |
| Core performance | Strong capillary water uptake and moisture release; intercepts calcium and magnesium ions to reduce white dust; long-term antibacterial and anti-mould action; removes tank odour |
| Physical structure | Dense pleated honeycomb construction for a large evaporation area; high wet stiffness so the cylinder does not collapse or come apart during prolonged immersion in the water tray |
| Main end applications | Household cold-evaporation mist-free humidifiers, premium air purifiers with humidification, industrial constant-temperature and constant-humidity equipment |
| Size and specification customisation | 100% OEM flexible manufacturing: outside diameter, inside diameter, height and pleat count, and optional composite anti-mould and antibacterial coating, all made precisely to drawing |
| Quality and certification | Manufactured in a 50,000 m² modern clean factory; company certified to ISO 9001/14001 and IATF 16949; quality controlled by a CNAS-accredited laboratory |
Dimensional consistency is the first quality requirement for a filter that must drop into a customer’s tray. Thesvin operates IATF 16949 (certified in 2024), and inspection is carried out at incoming, in-process and outgoing stages (IQC, IPQC, OQC) so that diameter, height, pleat count and coating are checked before packing. Filters are produced in a 50,000 m² facility that includes 6 clean workshops totalling 20,000 m². The company holds ISO 9001, ISO 14001 and ISO 45001 certification, and products can be supplied with REACH and RoHS compliance documentation on request.
Physical performance checks are carried out in the company’s own CNAS-accredited laboratory, which can issue test reports covering filtration efficiency, dust holding capacity and resistance. With more than 20 years of filter development and manufacturing experience and more than 1,000 filter solutions developed, the production lines support monthly output in the millions of pieces, which is relevant for appliance programmes with seasonal peaks. The company is based in Zhongshan, Guangdong, China, and has exported to Europe, the United States, Japan and Korea for over 20 years.
To receive a quotation, send the device or vehicle model, the cylinder size (outside diameter, inside diameter, height, pleat count) or a drawing, the airflow or water flow through the humidifier section, the operating conditions (water quality, temperature), and the quantity you expect per order. If you only have the old filter, send that instead — it is enough to start. Contact our team with these details and we will confirm the specification and next steps.
Fitment is determined by the outside diameter, inside diameter, height and pleat count of the cylinder. Thesvin manufactures to your drawing or to an old part you send, so the filter is built to your host unit’s dimensions rather than to a stock size. Send these dimensions and we will confirm the match before quoting.
Yes. A used filter from the unit is a practical dimensional reference. We measure the outside diameter, inside diameter, height and pleat count from the sample and use it to set the specification. If the old part has deformed in service, note that when sending so we can account for it.
The pleated honeycomb structure gives a large evaporation area and strong capillary uptake, and humidification efficiency can reach 85% or more. Under standard operating conditions the service life is 6–12 months, depending on water quality and how often the unit is used. Hard water and heavy use shorten the interval.
Yes. Outside diameter, inside diameter, height and pleat count are made to drawing, and an antibacterial and anti-mould coating is available as an option. Logo printing, colour-box design and neutral packaging can also be customised. Thesvin supports full OEM/ODM work based on your specification.
Samples are available for fit and performance testing. For custom specifications a sampling fee applies, which can be credited against production. The CNAS-accredited laboratory can supply performance test reports with the sample, covering key indicators such as water uptake and humidification efficiency.
Standard specifications typically start at 3,000 pieces, while custom products generally start at 5,000 pieces. Standard items ship in 7–15 days; custom sampling takes 7–10 days and mass production 30–45 days. Large or repeat orders can be scheduled with priority.
Replace the filter every 6–12 months under standard conditions. In hard-water areas, or where the humidifier runs continuously, check the cylinder for scale and stiffness earlier. The high wet stiffness helps it hold shape during immersion, but scale build-up still reduces performance over time.
An antibacterial and anti-mould treatment is available as an option, and the media is selected for long-term resistance to mould and odour in the water tray. This helps prevent the sour smell that can develop in tanks. Tell us your target market requirements when inquiring so the right option is specified.
