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Key specifications
- Power
- 25 W
- Tank capacity
- 2.3 L
- Dimensions
- 19 × 20.5 × 27 cm
- Net weight
- 0.83 kg
Verified specifications
- Power
- 25 W
- Tank capacity
- 2.3 L
- Dimensions
- 19 × 20.5 × 27 cm
- Net weight
- 0.83 kg
- Controls
- mechanical
- Mist output
- 300 ml/h
- Night light
- yes
Product description
WetAir · MH-204W
A lightweight white humidifier with a night light
WetAir MH-204W has a 2.3 L tank and mechanical mist adjustment. Output of up to 300 ml/h lets you add moisture gradually, with a night light providing additional light around the unit.

- Tank capacity
- 2.3 L
- Mist output
- up to 300 ml/h
- Power input
- 25 W
- Net weight
- 0.83 kg
Product film
MH-204W in a home interior
A white body with a gently curved teardrop silhouette. A full view of the appliance and close-ups of its body and front control dial.
How it works
From tank water to a fine mist
An ultrasonic transducer creates fine droplets without boiling the water.
Water reaches the transducer
The 2.3 L tank holds water for the MH-204W and supplies its mist-generating area.
Vibration creates mist
High-frequency vibration breaks water into fine droplets; this is not hot steam from boiling.
Mist enters the room
Droplets leave the unit and evaporate into the surrounding air, adding moisture.
Settings adjust delivery
Adjust the mist with the mechanical control and check the room with a separate hygrometer.
The resultHumidity gradually rises; reduce output if surfaces become damp or condensation appears.
One control for mist output
Mechanical controls keep manual adjustment straightforward. If nearby surfaces become damp or condensation forms on a window, reduce the output and check the humidity.
A white body weighing 0.83 kg
The MH-204W measures 19 × 20.5 × 27 cm and weighs 0.83 kg net. Switch off and empty the water before moving it; do not lift a filled humidifier by its tank alone.
Getting started
Position and fill
Place on a level, stable surface away from electronics and table edges. Unplug before filling and do not exceed the maximum level.
Choose the settings
Adjust the mist with the mechanical control and check the room with a separate hygrometer.
Check the humidity
Check humidity in the occupied area, not directly beside the mist outlet. Keep mist away from walls, fabrics and furniture.
Your questions answered
Does the dial automatically hold a humidity target?
The mechanical control adjusts mist output. Check room humidity with a hygrometer and adjust the output manually.
Can I add essential oils to the water?
Do not add oils or fragrances directly to the tank unless this model’s manual explicitly allows it. Use the recommended water type.
Model manual · MH-204W
Manual and service
Model documentation and WetAir support.
Customer reviews
What customers say about this model
Short positive excerpts about this exact model with direct links to public sources.
Where to find WetAir
These links open general WetAir retailer pages and do not confirm stock for this model.
Helpful WetAir guides
Practical guidance to help you use your appliance confidently and comfortably.

