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Product Highlights
- Removable Water Tank: No
- Visible Water Level: No
- Warranty (Years): 2
- Water Tank Capacity: 3.5
Philips 4000 Series Air Humidifier, White HU4210/04

Combat dry air symptoms hygienically, powered by NanoCloud technology. Engineered to protect you and your family from inhaling harmful bacteria while enjoying all the benefits of aromatherapy, and smart app control.
Key Features:
Combat dry air symptoms
Balanced humidity levels enhance perceived air quality 1. This humidifier is designed to relieve discomfort from dry air, such as dryness of the skin, lips, nasal passages, and eyes, throat irritation, congestion, and static electricity, while also keeping indoor plants hydrated for a healthier home.
Continuous humidification
Breathe comfortably with minimal refills. The 3.5L water reservoir offers up to 21h of continuous use for your convenience. Enjoy a comfortable atmosphere with fewer interruptions.
NanoCloud Technology
There is no other technology that releases cleaner water vapor into the air than Philips NanoCloud. Its ultra-fine mist is extremely difficult for bacteria to adhere to. The advantage is air humidification with up to 99% less bacteria releases than standard ultrasonic humidifiers 4, making this humidifier an ideal solution for baby rooms.
No white dust or wet strains
NanoCloud's invisible mist does not release white dust or leave wet patches 5. Large droplets emitted by ultrasonic humidifiers may dampen the surroundings and carry minerals that leave white residue on nearby surfaces. NanoCloud particles are too small to carry minerals, effectively preventing residue and stains.
1 Wolkoff, P. (2018) Indoor air humidity, air quality, and health-and overview. Elsevier, International Journal of Environmental Health, 221 (3), 376-390.
2 Tested by GB/T 23332-2018 in a third-party laboratory. Initial temperature of 23±2° and relative humidity of 30±2% RH.
3 Calculated using AHAM HU-1-2016 Clause 7.3 based upon the humidification performance tested according to GB/T 23332-2018 in a third-party laboratory.
4 Compared to standard ultrasonic humidifier modules that do not contain additional technology to reduce the spread of bacteria, as tested by an independent lab
5 Deposition of minerals on furniture was tested by a third-part laboratory over a period of 3 hours according to DIN 44973, CAS Testing.
Specifications
Global
- Model Number: HU4210/04
General
- Colour: White
- Made In: CHINA
Features
- Aromatherapy Support: Yes
- Cooling Function: No
- Remote Control: No
- Removable Water Tank: No
- Timer: No
- Visible Water Level: No
Design
- Water Tank Capacity: 3.5
Safety Features
- Auto Off: Yes
Control Features
- Smart Control: Yes
Energy Specification/Power
- Power (W): 3watts
Sensors
- Sensor Types: Humidity sensor
Dimensions
- Depth: 222mm
- Height: 334mm
- Width: 219mm
Weight
- Box Weight (Kg): 2.35
- Weight (Kg): 1.43
In The Box & Warranty
- Included: Humidification filter, 3 x Aroma pads
- Warranty (Years): 2
Other
- Box Depth (mm): 265
- Box Height (mm): 390
- Box Width (mm): 265
Manuals
Why Buy?
Breathe easier with cleaner, healthier air all day
This Philips humidifier transforms your home into a more comfortable space by adding the right amount of moisture to dry air. Its NanoCloud technology releases 99% fewer bacteria than standard humidifiers, so you can breathe confidently knowing the air is clean.
Say goodbye to dry skin, scratchy throats, and static shocks that make winter months uncomfortable. The 3.5-litre tank runs for up to 21 hours without refills, quietly humidifying rooms up to 44 square metres. Unlike other humidifiers, it won't leave white dust on your furniture or create damp patches around the unit, keeping your home looking as good as it feels.
The compact design fits neatly on bedside tables, desks, or shelves without taking over your space. Three fan speeds let you adjust the moisture output to match your comfort needs, while the automatic mode takes care of everything for you. With minimal maintenance and easy refilling, it becomes part of your daily routine without the fuss.
Buy this if…
- You wake up with dry skin or a scratchy throat during winter
- Your home feels stuffy or static electricity bothers you
- You want cleaner humidification without bacteria concerns
- You need coverage for medium to large rooms up to 44 square metres
- You prefer low-maintenance appliances that run quietly overnight




