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Product Highlights
- Effective Area: 156m2
- Filters Out Viruses (%): 99.97
- Filters Out Bacteria (%): 99.9
- CADR (m³/h): 600
- Noise Level (dBa): 51.5
- Remote Control: Yes
Philips PureProtect Pro 4200 Series Smart Air Purifier, Black AC4221/11

Our best purifier, quiet and energy efficient. Effectively captures allergens, pollutants, gases
- • Impressive power in smaller size
- • Traps smells and gas pollutants
- • Quiet, even at maximum power
- • Long lasting filter for up to 1 year
- • Designed for durability and sustainability
- • Lower energy consumption than a light bulb
- • Go to sleep and wake-up with fresh, clean air.
- • Effectively reduces viruses like H1N1 (flu) from the air
- • Captures 99.99% of allergens from dust, pollen or pets.
- • Control your purifier anywhere with the Philips Air+ app
- • 4-layer HEPA filtration traps 99.97% of smallest particles
- • Intelligently senses and adapts to your indoor air quality
Key Features:
4-layer HEPA filtration
4-layer filtration made of pre-filter, HEPA NanoProtect and double Active Carbon layer captures 99.97% of particles as small as 0.003 microns 5 – smaller than the smallest known virus!
Quiet, even at maximum power
Experience 35% less noise with SilentWings technology 6. Inspired by the silent flight of owls, our fan-blade design ensures purification as quiet as 15 dB(A). Even at maximum speed, it’s quieter than normal conversation. (6)
1 Sound pressure, IEC 60704, at 1.5m. Normal conversation: 60 dB.
2 CADR vs. Philips AC1715
3 CADR tested according GB/T18801-2022. Suitable purification area calculated to NRCC-54013 standard.
4 Calculated: 48m3 room, CADR of 600m3/h
5 From the air that passes through the filter, tested to DIN71460 with NaCl aerosol 0.003um and 0.3um, iUTA
6 vs. predecessor Philips AC4236
7 From the air that passes through the filter, tested with house dust mite, birch pollen and cat allergens according to SOP 350.003 of the Austrian OFI institute
8 Allergic Rhinitis and its Impact on Asthma (ARIA) 2008, written by J. Bousquet and approx. 50 other KOL’s, Allergy 2008: 63 (Suppl. 86): 8–160
9 Microbial Reduction Rate Test by Airmid Healthgroup Ltd. with influenza (H1N1) in 28.5m3 test chamber, using turbo mode for 30-40min
10 Tested to GB21551.3-2010 with S. Albus, 30m3 chamber, 1h, Turbo mode, 3rd party lab
11 Microbial Reduction Rate Test by Antimikrop with SARS-CoV-2 in 30m3 test chamber, using turbo mode for 1h.
Specifications
Global
- Model Number: AC4221/11
General
- Colour: Black
- Filter Type: HEPA
Features
- App-Control: Yes
- Remote Control: Yes
- Voice Control: No
Size
- Effective Area: 156m2
Design
- Fan Speed: 5
Performance
- CADR (m³/h): 600
- Filters Out Bacteria (%): 99.9
- Filters Out Pm2.5 (%): 99.97
- Filters Out Viruses (%): 99.97
Energy Specification/Power
- Noise Level (dBa): 51.5
- Power (W): 54watts
Electrical Requirements
- Cord Length: 1.8 m
Dimensions
- Depth: 520mm
- Height: 285mm
- Width: 285mm
Weight
- Weight (Kg): 6.5
In The Box & Warranty
- Included: PureProtect Pro 4200 Series Smart Air Purifier
- Warranty (Years): 2
Manuals
Why Buy?
Breathe Easier Every Day with the Philips PureProtect Pro 4200
If the air quality in your home matters to you — and it really should — this air purifier from Philips does the heavy lifting so you don't have to think about it.
This unit quietly gets on with removing the stuff you can't see but definitely don't want breathing in — viruses, bacteria, allergens, dust, and airborne nasties that can affect how you feel day to day. It's powerful enough to clean the air across a very large open-plan home, so whether you're cooking, sleeping, or just going about your day, you're consistently breathing cleaner, fresher air. It runs without being a distraction too — quiet enough to have going in a bedroom or living area without it becoming annoying background noise.
It's smart enough to take care of itself, adjusting automatically based on air quality so you're not constantly fiddling with settings. It fits comfortably into a modern home without looking out of place, and it handles serious floor space — ideal if you've got a large living area or an open layout.
Buy This If…
- You or your family suffer from allergies, asthma, or hay fever
- You want cleaner air without constantly managing a device
- You have a large open-plan home that needs serious coverage
- You're conscious about airborne illness in shared spaces
- You want a reliable, set-and-forget solution for everyday air quality









