Dreo HM420S 4 L Air Humidifier

89,90 €
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Product code: 576931-1
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The Dreo HM420S ultrasonic air humidifier with a 4 L tank delivers up to 40 hours of continuous operation, quiet 28 dB performance, and smart automatic humidity control. With the DREO app and voice assistants, it offers convenient control from anywhere, while MistWave™ technology efficiently disperses a fine mist for even room humidification. Features include top-fill, aromatherapy, and a leak-safe design.

The Dreo HM420S is a powerful ultrasonic humidifier for medium-sized rooms. The 4-liter tank provides convenience without frequent refills, the auto mode maintains optimal humidity, and the 28 dB quiet operation won’t disturb sleep or work. Thanks to MistWave™ technology, the fine mist rises up to 100 cm and humidifies the space evenly.

The device can be controlled via the DREO mobile app and by voice, allowing you to set schedules, switch modes, and monitor humidity in real time. Top-fill design simplifies maintenance, special protective features prevent moisture damage to electronics, and the leak-proof construction protects your home.

For a more pleasant atmosphere, it supports aromatherapy with essential oils and is compatible with descaling cartridges that extend lifespan and maintain mist quality.

  • Long runtime: up to 30–40 hours per fill
  • Very quiet: just 28 dB in quiet mode
  • Smart features: automatic humidity control, DREO app, voice control
  • Efficient mist distribution: 5 µm particles, height up to 100 cm
  • Easy use and maintenance: top-fill, electronics protection, leak-safe construction
  • Aromatherapy and filtration: supports essential oils and descaling cartridges

Specifications

Manufacturer
Dreo
Model
HM420S
Input voltage
AC 220–240 V, 50–60 Hz
Rated power
28 W
Water tank capacity
4 L
Maximum runtime
Up to 40 hours (at minimum mist level)
Mist height
Up to 100 cm
Steam stream width
10 cm
Mist particle size
5 µm
Ultrasonic frequency
2.4 MHz
Fan speed
3900 rpm
Noise level
28 dB (quiet mode)
Operating modes
Automatic / manual / sleep mode
Control
DREO mobile app + voice control
Humidity sensor
Accuracy ±5%
Aromatherapy
Supports essential oils
Filter compatibility
Yes – supports descaling and purification filters
89,90 €