Rotary Humidifier Filter (Spunlace Fabric)

The Jyntrel rotary humidifier filter is a self-priming evaporative filter made from spunlace nonwoven fabric, designed to remove calcium and magnesium ions from water and release moisture without white powder. It filters and evaporates water in cold-evaporation, mist-free humidifiers, air purifiers with humidification modules, and industrial constant-temperature and constant-humidity air-handling units. It suits appliance OEMs, HVAC engineers, and brand owners who need a stable, custom-fit humidification filter for their own equipment. Jyntrel manufactures this filter in Zhongshan, Guangdong, China, and supports full OEM tooling based on the customer's device drawing.

Operating Conditions and Airflow Path

This filter works in a wet, rotating duty cycle. It sits partly immersed in the water tank, turns through the water, and carries a water film into the air stream, where evaporation takes place. The airflow path is therefore from the humidifier's fan, across the wetted filter surface, and into the room or duct. Because the filter is continuously wetted and rotated, its stiffness and its resistance to softening and shedding matter as much as its absorption rate.

For systems engineers, the relevant operating variables are water quality, water temperature, airflow velocity across the filter, and the number of operating hours per day. Soft water or purified water reduces scale loading and keeps the capillary structure open. The spunlace fabric is treated for long-term antibacterial and anti-mould performance, which addresses the sour odour and slime that can develop in tanks that are kept wet for long periods. The reinforced stiffness treatment is intended to keep the filter from collapsing or separating after prolonged soaking and rotation in the water trough.

The filter is not a HEPA stage and is not intended to remove fine particulate from the air. Its function is water-side: physical interception of hardness ions, fast capillary wicking, and rapid evaporation. In an air purifier with a humidification module, it should be placed after the main particle filtration stage so that the air reaching the filter is already cleaned, and so that the evaporated moisture is not carrying dust into the room.

Core Performance

The performance story is cold evaporation without white powder. As water is drawn through the humidifier paper or polymer humidifier fibre, calcium and magnesium ions are physically intercepted, so the moisture released to the air does not leave the fine white dust associated with ultrasonic humidifiers. Capillary absorption is designed to be fast, so the filter re-wets quickly on each rotation and evaporation stays even across the working surface.

The second performance axis is hygiene. Long-term antibacterial and anti-mould treatment is applied to resist bacterial growth and mould in the wet section, which helps prevent the tank from turning sour or developing odour. The third axis is mechanical durability: a special stiffness-enhancing process gives the filter high wet stiffness, so it does not soften, collapse, or come apart during long soaking and repeated rotation in the water tank.

Because output depends on the device, the airflow, the water hardness, and the filter area, Jyntrel does not quote a single efficiency figure for all applications. Instead, the filter is matched to the customer's humidifier design, and performance can be verified in the company's CNAS-recognised laboratory.

Selection and Customisation: the Data We Need

Selection starts from the device, not from a catalogue number. The filter is made to the customer's whole-machine drawing, so the gear ring, the central shaft interface, the humidification area, and the thickness are all part of the tooling scope. Injection-moulded plastic gear rings, centre shaft interfaces, and the humidification area and thickness can all be tooled and produced by Jyntrel.

To quote accurately, please provide the following:

• Device or vehicle model, or a dimensional drawing of the filter seat and drive interface.
• Required outer diameter, thickness, and humidification area, plus the centre shaft and gear ring geometry.
• Airflow through the humidifier, or the target humidification output, and the fan arrangement.
• Water flow, water source (tap, soft, or purified), and water temperature.
• Operating conditions: hours per day, duty cycle, ambient temperature and humidity, and whether the unit runs continuously.
• Estimated annual quantity and packaging requirements.

With these inputs, Jyntrel can select the humidifier paper or humidifier fibre grade, define the stiffness treatment, and propose a tooling and sampling plan.

Parameters

Typical Applications

The filter is used in high-end cold-evaporation mist-free humidifiers, where the rotating drum carries water into the air stream and releases it as vapour. It is also used in air purifiers that include a humidification module, and in industrial constant-temperature and constant-humidity air-handling units where stable moisture output is required. In each case, the filter is matched to the host device's drive interface and water tank geometry, so the same material platform can serve different appliance designs.

For HVAC engineers, the relevant point is that the filter behaves as a wet evaporative medium rather than a dry air filter. It should be specified with the water quality and the rotation duty in mind, and it should be replaced on a schedule that reflects the local water hardness and the hours of use.

Manufacturing and Testing at Jyntrel

Jyntrel has more than 20 years of filter product research, development, and manufacturing experience, and has been exporting to Europe, the United States, Japan, and South Korea for more than 20 years, which supports supply stability for long-running appliance programmes. Multiple automated production lines give a monthly capacity of millions of pieces, so volume orders and seasonal peaks can be planned.

The production base covers 50,000 m² in Zhongshan, Guangdong, China, including 6 clean workshops with a combined area of 20,000 m². The company's own laboratory is CNAS-recognised and can issue test reports for filtration efficiency, dust holding capacity, and resistance, and the humidifier filter can be verified for evaporation performance in the same laboratory. Quality control runs through IQC, IPQC, and OQC. The company holds ISO 9001, ISO 14001, and ISO 45001 certification, and obtained IATF 16949 certification in 2024. Products meet REACH and RoHS environmental requirements, and compliance documents can be provided.

OEM and ODM support covers size, structure, filter material grade, frame material, logo, and packaging. More than 1,000 filter solutions have been developed in total.

Share Your Operating Conditions

To receive a solution-oriented quote, send the device or vehicle model, the filter size or a drawing, the airflow or water flow, the operating conditions, and the estimated quantity. Jyntrel will respond with a material and tooling proposal matched to your humidifier's air path and water-side duty. Start here: contact Jyntrel.