Philips PureProtect Pro 4200 Series Smart Air Purifier AC4221/11

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:



Big power in smaller size

Up to 1.5x more powerful than products of its size ², thanks to its innovative double-fan design. With powerful filtration of 600 m3/h (CADR), it can easily handle large spaces of up to 156m2 ³ and can clean a room of 20m2 in less than 5 minutes ⁴.



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)



Captures 99.99% of allergens

All-day protection for allergy sufferers. Removes 99.99% of dust mite, pollen, pet, or mold spore allergens ⁷, known triggers of allergy or hay fever symptoms ⁸. ECARF certified allergy-friendly.



Captures viruses from the air

Removes 99.9% of airborne viruses and bacteria. Independently tested to eliminate H1N1 influenza virus ⁹, Staphylococcus bacteria ¹⁰, and 99.99% of SARS-CoV-2, the cause of COVID-19 ¹¹.

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.

CADR vs. Philips AC1715
CADR tested according GB/T18801-2022. Suitable purification area calculated to NRCC-54013 standard.
Calculated: 48m3 room, CADR of 600m3/h
From the air that passes through the filter, tested to DIN71460 with NaCl aerosol 0.003um and 0.3um, iUTA
vs. predecessor Philips AC4236
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
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
Microbial Reduction Rate Test by Airmid Healthgroup Ltd. with influenza (H1N1) in 28.5m3 test chamber, using turbo mode for 30-40min
Tested to GB21551.3-2010 with S. Albus, 30m3 chamber, 1h, Turbo mode, 3rd party lab
Microbial Reduction Rate Test by Antimikrop with SARS-CoV-2 in 30m3 test chamber, using turbo mode for 1h.