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Key Features
- Thorough cleaning of rooms up to 78 m2
- 3-layer HEPA filtration traps 99.97% of smallest particles
- Automatic humidification of up to 650 ml/h
- Hygienic humidification with NanoCloud technology
- Effectively reduces viruses like H1N1 (flu) from the air
Philips PureProtect Water 3400 Series Smart 2-in-1 Air Purifier and Humidifier - Black, AC3421/13

The Philips PureProtect Water 3400 Series Smart 2-in-1 Air Purifier and Humidifier is a versatile appliance designed to enhance indoor air quality by combining advanced air purification with efficient humidification.
Key Features:
3-layer HEPA filtration
3-layer filtration made of pre-filter, HEPA NanoProtect and Active Carbon captures 99.97% of particles as small as 0.003 microns 3– smaller than the smallest known virus!
Humidification rate 650ml/h
Combat dry air symptoms such as dry skin, chapped lips, irritated nose or throat, with rapid humidification up to 650 ml/h 4. The humidity is detected and automatically adjusted to your desired setting.
NanoCloud technology
No technology releases cleaner water vapor than NanoCloud. Its ultra-fine mist is invisible to the naked eye and extremely difficult for bacteria or residue to adhere to. Humidify air with up to 99,9% fewer bacteria released than standard ultrasonic humidifiers, safe to use with tap water. 5
1 CADR tested according GB/T18801-2022. Suitable purification area calculated to NRCC-54013 standard.
2 Calculated: 48m3 room, CADR of 300m3/h
3 From the air that passes through the filter, tested to DIN71460 with NaCl aerosol 0.003um and 0.3um, iUTA
4 Tested by CVC according to GB/T 23332-2018. Initial temperature of 23±2°C and relative humidity of 30±2% RH
5 Vs. standard ultrasonic humidifiers without additional technology to reduce the spread of bacteria, as tested by an independent lab
6 Microbial Reduction Rate Test by Airmid Healthgroup Ltd. with influenza (H1N1) in 28.5m3 test chamber, using turbo mode for 30-40min
7 Tested to GB21551.3-2010 with S. Albus, 30m3 chamber, 1h, Turbo mode, 3rd party lab
8 Microbial Reduction Rate Test by Antimikrop with SARS-CoV-2 in 30m3 test chamber, using turbo mode for 1h.
Specifications
Global
- EAN: 8720389040719
- Model Number: AC3421/13
General
- Colour: Black
Features
- App-Control: Yes
- Remote Control: Yes
- Timer: Yes
- Voice Control: No
Size
- Effective Area: 78 m2
Design
- Fan Speed: 5
- Water Tank Capacity: 3.2
Performance
- CADR (m³/h): 300
Safety Features
- Auto Shutoff: Yes
Energy Specification/Power
- Noise Level (dBa): 51
- Power (W): 43watts
Electrical Requirements
- Cord Length: 1..8m
Dimensions
- Depth: 285mm
- Height: 520mm
- Width: 285mm
Weight
- Weight (Kg): 6.5
In The Box & Warranty
- Warranty (Years): 2
Manuals
Why Buy?
Breathe Easier, Feel Better at Home
If the air in your home feels stale, dry, or you're constantly sneezing, this Philips 2-in-1 does two important jobs at once — purifying your air and keeping moisture levels comfortable, all without you having to think about it.
It quietly works through rooms up to 78 square metres, pulling out 99.97% of the tiny particles that trigger allergies, irritate airways, and make breathing uncomfortable — things like dust, pollen, and pet dander. It also reduces airborne viruses, including flu strains, which is genuinely reassuring during winter. On top of that, it adds clean moisture back into the air at a healthy rate, helping with dry skin, scratchy throats, and that stuffy feeling you get when heating or cooling runs all day. The humidification is hygienic too, so you're not just pushing damp air around the room.
It fits neatly into a living room or bedroom and handles itself automatically, adjusting to what your air actually needs. Less fiddling, fewer separate devices, and a noticeably more comfortable home environment day to day.
Buy This If…
- You or your family suffer from allergies or asthma
- Your home feels dry and stuffy during winter heating
- You want fewer appliances taking up floor space
- You're concerned about airborne germs and viruses
- You prefer something that works automatically without constant adjusting









