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Air purifier

4000i Series

Purifies the air in less than 5 min (1)

With just one push of a button, the air purifier filters the invisible viruses, allergens or pollutants in your home, to keep it clean and safe. It purifies quickly and effectively, thanks to its clean air delivery rate (CADR) of 610 m³/h.

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AC3858/51 |

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Purifies the air in less than 5 min (1)

99.9% virus, allergen & pollutant removal (3,4,7)

  • Purifies rooms up to 73 m²
  • 610 m³/h clean air rate (CADR)
  • HEPA & Active Carbon filter
  • Connected with CleanHome+ app

High performance suitable for rooms of up to 73 m²

360° airflow intake effectively covers rooms up to 73 m² and distributes clean air in every corner of the room. This boosts performance to 610 m³/hr (2) CADR (Clean Air Delivery Rate). It cleans 20 m² in only 5 min. (1)

Low energy consumption

Thanks to its energy efficient design, the air purifier runs at max. 60 W power. This is equivalent to one standard light bulb.

Sleep mode with ultra-quiet op

In Sleep mode, display lights are dimmed, and the purifier operates in near silence for clean air while you sleep. Certified by Quiet Mark

Smart filter indicator

Smart filter indicator

The air purifier accurately calculates filter lifetime based on pollution level and operation time. It notifies you when filter needs replacement for easy maintenance.

Air quality display

Air quality display

See the real-time air quality in your home at a glance. The display shows the level of allergens, gases and PM2.5 in numerical form, as well as with an intuitive color ring.

HEPA filter captures 99.97% of particles of 0.003 microns

HEPA filter captures 99.97% of particles of 0.003 microns

3-layer filtration with NanoProtect HEPA, active carbon filter and pre-filter captures 99.97% of ultra-fine particles as small as 0.003 microns (4), so you are safe from PM2.5, bacteria, pollen, dust, pet dander, gas and other pollutants (7). Certified by the European Centre for Allergy Research Foundation.

Detects and removes allergenic dust at night (10)

Detects and removes allergenic dust at night (10)

Next to regular Sleep mode, the product is equipped with a special Allergy Sleep mode to protect you at night. This mode effectively detects allergenic dust in the air and switches the device to a more powerful speed, delivering up to 40% more clean air during the night (11) - while keeping the sound level low.

Track and control with the app

Track and control with the app

Monitor the air quality and control your air purifier anytime, anywhere with the Clean Home+ app. Get alerted when air quality is not right.

Removes up to 99.9% of viruses and aerosols from the air

Removes up to 99.9% of viruses and aerosols from the air

Captures aerosols including those which may contain respiratory viruses. Tested independently by airmid health-group to remove up to 99.9% of viruses and aerosols from the air (3). Also tested for coronavirus (5).

Auto mode and 4x manual speed levels

Auto mode and 4x manual speed levels

Run your product in intelligent automatic mode or choose from 4x speed levels: Sleep, Speed 1, 2 and Turbo - to be fully in control of the airflow and sound level.

Smart sensors for intelligent purification

Smart sensors for intelligent purification

Scans the air 1000x a second to detect ultra fine-particles. Reports the air quality in real time, and intelligently chooses the right speed for your home (in auto mode).

Thoroughly tested for quality you can trust

Thoroughly tested for quality you can trust

Philips purifiers go through 170 mandatory and strict inspection tests before releasing from factory. They are subjected to rigorous life and durability tests, for continuous operation 24/7.
Technical Specifications

  • Weight and dimensions

    Weight

    8 kg kg

    Dimensions (L*W*H)

    310*310*718

    Color(s)

    White, Grey

  • Performance

    CADR (Particle, GB/T)

    610 m³/h m³/h

    Room size (G/BT)

    Up to 73 m²

    Filtration

    HEPA, Active Carbon, Prefilter

    Air quality sensor(s)

    PM2.5 particle, Gas

    Allergens filtration

    99.99%

    Virus & aerosol filtration

    99.9%

    Particle filtration ***

    99.97% (0.003 um)

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Technical Specifications

  • Weight and dimensions

    Weight

    8 kg kg

    Dimensions (L*W*H)

    310*310*718

    Color(s)

    White, Grey

  • Performance

    CADR (Particle, GB/T)

    610 m³/h m³/h

    Room size (G/BT)

    Up to 73 m²

    Filtration

    HEPA, Active Carbon, Prefilter

    Air quality sensor(s)

    PM2.5 particle, Gas

    Allergens filtration

    99.99%

    Virus & aerosol filtration

    99.9%

    Particle filtration ***

    99.97% (0.003 um)

  • Usability

    Min. sound level (Sleep mode)

    18 dB (9) dB

    Max. sound level (Turbo mode)

    57 dB (9) dB

    Cord length

    1.8 m m

    Automatic mode

    Yes

    Manual speed settings

    4 (Auto, Speed 1, Speed 2, Turbo)

    Air quality feedback

    Color ring, numerical

    Auto-ambient light

    Yes

  • Energy efficiency

    Max. power consumption

    60 W W

    Stand-by power consumption

    <2 W W

    Voltage

    230 V V

  • Maintenance

    Recommended filter change

    3 years (6)

    Replacement filter

    FY4440/30

    Service

    2-year worldwide guarantee

  • Connectivity

    App, connects via Wi-Fi

    Clean Home+

    Smartphone compatibility

    iPhone and Android devices

    Voice control

    Alexa, Google Home (7)

  • (1)From the air that passes through the filter, it is a theoretical time for one-time cleaning calculated by dividing its CADR 520 m³/h by the room size of 48 m³ (assuming the room is 20 m² in floor area and 2.4 m in height).
  • (2)CADR is tested by a certified third party lab, according GB/T18801-2015. Following improvements in our testing method and production quality control, we upgraded the CADR values of our products. If you buy a product where this info is not updated on the box yet, rest assured that the product performs at the higher specification mentioned online.
  • (3) Microbial Reduction Rate Test conducted at Airmid Health group Ltd. tested in a 28.5m³ test chamber contaminated with airborne influenza A(H1N1). * An air purifier by itself does not protect against Covid19, but can be part of plan to protect yourself and your family (US Environmental Protection Agency)
  • (4)From the air that passes through the filter, tested with NaCl aerosol by iUTA according to DIN71460-1
  • (5)Microbial Reduction Rate Test at external lab, in a test chamber contaminated with avian coronavirus (IBV) aerosols, with Philips HEPA NanoProtect filter.
  • (6)The recommended service life for the device is based on a theoretical calculation of the average annual regional values of harmful air particles outdoors and daily use of the air purifier for 16 hours in automatic mode.
  • (7)Tested on the filter media for 1 pass efficiency at 5.33cm/s air flow, by a third party lab./From the air that passes through the filter, tested to JISB 9908-2015
  • (8)Alexa and Google Home availability depends on your location
  • (9)The calculated average sound pressure at 1.5 meter from the device, based on measurements according to IEC 60704. Sound pressure level depends on the room construction, decoration and positioning of device and listener.
  • (10) As tested in a real-life setup, with dust resuspended by a person stepping into bed.
  • (11) Based on CADR measurements according to GB/T-18801/2015 with device operating in Sleep mode and Allergy Sleep mode.