• Philips PureProtect Pro 4200 Series Smart Air Purifier Metallic Black AC4221-11

    $599

    Philips PureProtect Pro 4200 Series Smart Air Purifier Metallic Black AC4221-11

    $599
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    Colour: Black
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    • Overview
    • Specifications & manuals
    • Reviews
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

    The Philips PureProtect Pro 4200 Series Smart Air Purifier (AC4221/11) delivers best-in-class air purification with powerful, quiet, and energy-efficient performance. Featuring a robust double-fan system, it offers up to 1.5x more power than similar-sized models, cleaning large spaces up to 156 m² or a 20 m² room in under five minutes — perfect for busy households, open-plan living, or allergy-prone environments.

    Its advanced four-layer filtration system, including HEPA NanoProtect and double Active Carbon layers, captures 99.97% of ultrafine particles, allergens, viruses, and gases down to 0.003 microns, ensuring superior air quality. Certified to remove 99.99% of allergens like dust, pollen, pet dander, and mould spores, it provides reliable, all-day protection for sensitive users.

    SilentWings technology, inspired by owl flight, delivers whisper-quiet operation at just 15 dB, even at full speed, making it ideal for bedrooms and workspaces. Intelligent AeraSense sensors continuously monitor PM2.5, gas, allergen, temperature, and humidity levels, automatically adjusting the purifier’s performance for optimal air quality.

    With smart connectivity, the Philips Air+ app allows remote control, real-time air quality tracking, smart scheduling, and voice command compatibility through Google Assistant and Alexa. Designed with durability and sustainability in mind, over 30% of its materials come from recycled plastics, reinforcing Philips’ commitment to eco-conscious living.
    Double-fan Compact Power

    Innovative twin-fan design delivers 1.5x more power for rapid, thorough purification, covering rooms up to 156 m² and cleaning 20 m² in under five minutes.

    4-layer HEPA & Carbon Filtration

    Captures 99.97% of particles, allergens, viruses, and gas pollutants as small as 0.003 microns, ensuring exceptionally pure and healthy indoor air.

    SilentWings Quiet Technology

    35% quieter than previous models, using owl-inspired fan blades to operate at just 15 dB, even at maximum speed, for undisturbed comfort.

    Smart Sensors & App Control

    Equipped with PM2.5, gas, and allergen sensors, integrates with the Philips Air+ app and voice assistants for effortless, adaptive, and remote air management.

    Specifications & manuals

    key Specifications
    Brand
    Philips
    Model Number
    AC4221-11
    Height (mm)
    520 mm
    Width (mm)
    345 mm
    Depth (mm)
    345 mm
    Weight (kg)
    6.5 kg
    Finish Colour
    Black
    Finish Colour Description
    Black
    warranty
    Manufacturer Warranty
    2 Years
    Use
    Not intended or designed for commercial use.
    other Features
    Features
    • Double-fan Performance: Twin-fan system delivers 1.5x more power, achieving 600 m³/h CADR to purify large rooms up to 156 m² and clean 20 m² in less than five minutes.
    • HEPA + Carbon Filtration: Four-stage filtration removes 99.97% of ultrafine particles and over 96% of harmful gases and odours, ensuring comprehensive indoor air purification.
    • SilentWings Technology: Operates at just 15 dB, making it 35% quieter than previous models — perfect for undisturbed sleep, study, or relaxation.
    • Allergen Elimination: Removes 99.99% of allergens like pollen, pet dander, and mould spores, offering ECARF-certified relief for allergy sufferers and sensitive individuals.
    • Smart Sensing & Adaption: Built-in AeraSense technology continuously monitors air quality, automatically adjusting purification speed based on PM2.5, gas, and humidity levels.
    • Philips Air+ App Control: Offers remote control, live air quality data, and voice command compatibility via Google Assistant and Alexa for seamless smart home integration.
    • Eco-friendly & Energy Saving: Operates at just 54 W and uses over 30% recycled plastic in construction, balancing high performance with sustainable, cost-effective design.
    • Virus & Bacteria Protection: Independently tested to remove 99.9% of airborne viruses and bacteria, including H1N1 and SARS-CoV-2, for enhanced home health safety.
    • Fresh Wake-up & Bedtime Modes: Automatically increases airflow before wake-up and purifies your room before bed, enhancing comfort with clean air and a cosy night light.
    • Long-lasting Filters: Delivers up to one year of filtration per set, reducing maintenance needs while maintaining peak performance and air purity over time.
    electrical Connection
    Length of cord
    1.8 m
    country of Origin
    Origin
    China

    Reviews

    Rating snapshot

    5
    35
    4
    8
    3
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    Average customer rating

    Overall
    4.8

    Appliances Online's customer reviews are independently managed by Bazaarvoice, ensuring their accuracy and honesty. Vouchers are sometimes offered to verified buyers in exchange for their unbiased review.

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    Pros
    1-3 of 43 reviews
    Lauren52025-06-14
    Love this so much!
    [This review was collected as part of a promotion.] I love that its powerful but also not ear breakingly loud either with the ability to change settings from Turbo to Sleep so it can continue to run and not disturb your sleep, i love the app that pairs with it that give you the full run down of the air quality in the home, its easy to follow and understand and watching first hand when spraying deodorant just how quickly the air purifier cleans the air, I normally wouldn't have bought one myself so being given the privilege to try one has been amazing and I can't believe I didn't have one in the home sooner especially being seasonal allergy sufferers.
    Dolphin2472025-06-18
    Good performance
    [This review was collected as part of a promotion.] Very quiet device. Good control direct via mobile phone Good performance abd air quality. We could feel the different air in our house after a few days of use. Easy to set up,use and maintainGreat 4 mode function
    Erynelizabeth72025-06-23
    Surprising
    [This review was collected as part of a promotion.] I wasn’t sure about this product at first as I wasn’t sure if I could gage if it was working or not but this really surprised me. I feel like the air is cleaner in the room especially with little kids. It’s scary to think of how much dust/dirt/pollution. I was vacuuming one day and the lights lit up red to let me know there was a lot of dirt etc in the air. It was great to know it was working. My kids have been less sneezy/coughing which is great. I would recommend this product for anyone with small kids or just to have more purified air to help you sleep better at night.

    Legendary service

    The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
    I have been telling friends
    Michael, Australia
    I will use your service again in the future
    Reinilda ,
    Wow! What great service
    Ross, West Ulverstone, TAS

    Delivery, services & returns

    Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.

    Questions & answers

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