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Philips 4000i Series AC4236/10 Review | 46 Data compared

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  • Avg. price: ~£220
  • Max. CADR: 610 m³/h
  • Maximum room area: 158 m²
  • Maximum noise level: 57 dB
  • HEPA filter: yes
  • Weight: 7.4 kg

Philips 4000i Series AC4236/10 review. Compare 46 technical specifications and user reviews to see how this product ranks in the Air Purifiers category and whether it is worth buying.

8.3

Overall score

What it is: An overall evaluation of products in the Air Purifiers category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Air Purifiers category.

Score components:

80.0%

8.2

Technical Score

20.0%

9.0

User score

Excellent
8.2

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

8.4

Performance

40.0%

8.7

Features

10.0%

4.8

Design

Excellent
9.0

User score

What it is: A rating that combines user reviews with the total review volume for products in the Air Purifiers category.

When it matters: When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.8

User reviews

30.0%

9.4

Popularity

User score:
United Kingdom
amazon
4.4
(893)

(Reviews last updated: August 2026)

Exceptional
  • 6.7
    Bedroom use

    Score components:

    35.0%

    3.3

    Maximum noise level

    30.0%

    10

    Night mode

    20.0%

    10

    Maximum room area

    15.0%

    3.6

    Weight

  • 9.1
    Allergy relief

    Score components:

    35.0%

    10

    Max. CADR

    30.0%

    10

    HEPA filter

    20.0%

    5.5

    Number of filtration stages

    15.0%

    10

    Washable prefilter

  • 9.1
    Smoke removal

    Score components:

    35.0%

    10

    Activated carbon filter

    30.0%

    10

    Max. CADR

    20.0%

    5.5

    Number of filtration stages

    15.0%

    10

    Air quality indicator

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Best prices in UK

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Philips 4000i Series AC4236/10 is a premium, high-performance air purifier designed for XXL spaces up to 158 m², delivering an exceptional Clean Air Delivery Rate (CADR) of 610 m³/h that can clean a 20 m² area in less than 5 minutes. Its key characteristics include a 3-layer filtration setup comprising a pre-filter, an active carbon filter, and a NanoProtect HEPA filter that captures 99.97% of ultrafine particles down to 0.003 microns, alongside smart AeraSense sensors providing real-time numerical and color-coded feedback for PM2.5, gases, and allergens. Main pros include its energy-efficient 60W maximum power consumption, near-silent sleep mode operating at just 18 dB, ECARF allergy-friendly certification, and seamless remote control via the Air+ companion app. However, notable cons include its bulky design and heavy weight of 7.4 kg, the lack of built-in carrying handles for easy mobility, and the high cost of replacement filters.

Technical Specifications of air purifier Philips 4000i Series AC4236/10

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

8.4

Performance

40.0%

8.7

Features

10.0%

4.8

Design

8.2
Philips 4000i Series AC4236/10 has a technical score of 8.17 points, which is higher than 95.6% of products in this category.
User score

What it is: A rating that combines user reviews with the total review volume for products in the Air Purifiers category.

When it matters: When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.8

User reviews

30.0%

9.4

Popularity

User score:
United Kingdom
amazon
4.4
(893)

(Reviews last updated: August 2026)

9.0
Philips 4000i Series AC4236/10 has a user score of 8.98 points, which is higher than 68.9% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by products in the Air Purifiers category.
When it matters: When you prefer products in the Air Purifiers category that have been chosen and reviewed by many other buyers.
9.4
Philips 4000i Series AC4236/10 has a popularity of 9.4 points, which is higher than 68.9% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Air Purifiers category with their prices.

When it matters: When you are comparing products in the Air Purifiers category and want a good balance between quality and price.

Score components:

60.0%

8.3

Overall score

40.0%

8.8

Price

8.5
Philips 4000i Series AC4236/10 has a quality-to-price ratio of 8.5 points, which is higher than 97.8% of products in this category.
Power
What it is: The electrical power consumption of the air purifier during operation, measured in watts (W).
When it matters: Helpful for estimating long-term electricity costs, particularly when running the unit continuously day and night.

Importance: HIGH

60 W
Philips 4000i Series AC4236/10 has a power output of 60 W, which is higher than that of 80.1% of air purifiers and the same as that of 3.9% of air purifiers.
Max. CADR
What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.
When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.

Importance: HIGH

610 m³/h
Philips 4000i Series AC4236/10 delivers a CADR of 610 m³/h, which is higher than that of 97.5% of air purifiers.
Maximum room area
What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.
When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.

Importance: HIGH

158 m²
Philips 4000i Series AC4236/10 covers up to 158 m², which is larger than 97.7% of air purifiers.
N. of speeds
What it is: The number of manual airflow speed levels available to choose on the air purifier.
When it matters: Provides flexible control between whisper-quiet low speeds for sleeping and powerful high speeds for fast room clearing.

Importance: MEDIUM

4
Philips 4000i Series AC4236/10 offers 4 fan speeds, which is more than 55.9% of air purifiers and the same as 25.1% of air purifiers.
Maximum noise level
What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).
When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.

Importance: HIGH

57 dB
Philips 4000i Series AC4236/10 reaches 57 dB at maximum speed, which is louder than 75% of air purifiers and the same as 1.8% of air purifiers.
Show more
Air quality indicator
What it is: An optical or laser sensor system displaying real-time indoor pollution levels via color rings or numerical values.
When it matters: Provides immediate visual feedback on air cleanliness and confirms that the purifier is working effectively.

Importance: MEDIUM

yes
Philips 4000i Series AC4236/10 has an air-quality indicator. This feature is present on 65.4% of air purifiers.
Continuous purification
What it is: Engineered motor and filter architecture designed for safe, uninterrupted 24/7 operation without thermal degradation.
When it matters: Essential for maintaining permanently low allergen and dust concentrations in polluted urban areas or high-pollen seasons.

Importance: LOW

yes
Philips 4000i Series AC4236/10 supports continuous purification. This feature is present on 86.3% of air purifiers.
Auto mode
What it is: An intelligent operating mode that automatically increases or decreases fan speed based on live sensor pollution readings.
When it matters: Maximizes convenience and saves electricity by running quietly on low speed and ramping up only when pollution is detected.

Importance: MEDIUM

yes
Philips 4000i Series AC4236/10 has auto mode. This feature is present on 67% of air purifiers.
Timer
What it is: A programmable shut-off countdown timer that turns off the air purifier automatically after a set number of hours.
When it matters: Convenient for running the unit for a specific duration before leaving home or going to bed without wasting electricity.

Importance: LOW

no
Philips 4000i Series AC4236/10 does not have a timer. This feature is present on 75% of air purifiers.
Maximum timer
What it is: The longest selectable countdown duration available on the air purifier's timer, expressed in hours.
When it matters: Relevant if you prefer setting extended automated operating cycles, such as a full 8-hour workday or 12-hour overnight window.

Importance: LOW

N/A
Show more
Color
What it is: The primary exterior color and aesthetic finish of the air purifier housing.
When it matters: Important for ensuring the appliance blends harmoniously into your room decor and furniture style.

Importance: LOW

white, grey
Material
What it is: The primary manufacturing material used for the outer casing, such as ABS plastic, polycarbonate, or aluminum.
When it matters: Influences structural rigidity, scratch resistance, premium appearance, and ease of wiping clean.

Importance: LOW

plastic
Display
What it is: An integrated digital screen showing active fan speed, particulate pollution numbers, filter health, and active timers.
When it matters: Enables quick visual checks of air metrics and purifier settings directly on the device without picking up your phone.

Importance: LOW

yes
Philips 4000i Series AC4236/10 has a display. This feature is present on 51.1% of air purifiers.
Display position
What it is: The physical placement of the display screen on the body of the air purifier (e.g., top panel or front facade).
When it matters: Affects viewing convenience: top displays are easiest to read while standing, while front displays are visible from across the room.

Importance: LOW

top
Control type
What it is: The user interface mechanism for operating the device, such as capacitive touch keys, push buttons, or rotary dials.
When it matters: Determines tactile responsiveness, ease of operation in dark rooms, and durability over years of regular use.

Importance: LOW

touch, app, voice
Show more

Philips 4000i Series AC4236/10 vs the average air purifier

  • 2.54x higher CADR
    Philips 4000i Series AC4236/10 provides a higher clean air delivery rate than the average air purifier (610 m³/h vs 240 m³/h).
    What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.
    When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.

    Importance: HIGH

    Philips 4000i Series AC4236/10 provides a higher clean air delivery rate than the average air purifier (610 m³/h vs 240 m³/h).610 m³/h vs 240 m³/h
  • 109 m² larger room area
    Philips 4000i Series AC4236/10 covers a larger room area than the average air purifier (158 m² vs 49 m²).
    What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.
    When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.

    Importance: HIGH

    Philips 4000i Series AC4236/10 covers a larger room area than the average air purifier (158 m² vs 49 m²).158 m² vs 49 m²
  • Supports Wi‑Fi
    Philips 4000i Series AC4236/10 supports Wi‑Fi; the average air purifier does not.
    What it is: Wireless connectivity enabling smartphone app pairing for remote operation, scheduling, and live air quality tracking.
    When it matters: Allows you to inspect home pollution levels from work and turn on the purifier so you return home to clean air.

    Importance: MEDIUM

    Philips 4000i Series AC4236/10 supports Wi‑Fi; the average air purifier does not.
  • 22.5 W higher power
    Philips 4000i Series AC4236/10 has a higher power output than the average air purifier (60 W vs 37.5 W).
    What it is: The electrical power consumption of the air purifier during operation, measured in watts (W).
    When it matters: Helpful for estimating long-term electricity costs, particularly when running the unit continuously day and night.

    Importance: HIGH

    Philips 4000i Series AC4236/10 has a higher power output than the average air purifier (60 W vs 37.5 W).60 W vs 37.5 W
  • Has ECARF certification
    Philips 4000i Series AC4236/10 has ECARF certification; the average air purifier does not.
    What it is: An independent certification from the European Centre for Allergy Research Foundation verifying proven allergy-friendly performance.
    When it matters: Provides clinical reassurance for allergy and asthma sufferers that the unit significantly reduces airborne pollen and allergen loads.

    Importance: LOW

    Philips 4000i Series AC4236/10 has ECARF certification; the average air purifier does not.
  • Supports voice control
    Philips 4000i Series AC4236/10 supports voice control; the average air purifier does not.
    What it is: Integration with voice assistants such as Amazon Alexa, Google Assistant, or Apple Siri for voice commands.
    When it matters: Offers convenient hands-free control to adjust fan speeds, check filter status, or turn the purifier on and off.

    Importance: LOW

    Philips 4000i Series AC4236/10 supports voice control; the average air purifier does not.
  • Supports 360° purification
    Philips 4000i Series AC4236/10 supports 360° purification; the average air purifier does not.
    What it is: A cylindrical or multi-directional intake design that draws in polluted room air from all surrounding angles.
    When it matters: Improves airflow circulation and offers versatile room placement without needing to position the intake toward open space.

    Importance: MEDIUM

    Philips 4000i Series AC4236/10 supports 360° purification; the average air purifier does not.
  • 1 more fan speeds
    Philips 4000i Series AC4236/10 provides more fan speed settings than the average air purifier (4 vs 3).
    What it is: The number of manual airflow speed levels available to choose on the air purifier.
    When it matters: Provides flexible control between whisper-quiet low speeds for sleeping and powerful high speeds for fast room clearing.

    Importance: MEDIUM

    Philips 4000i Series AC4236/10 provides more fan speed settings than the average air purifier (4 vs 3).4 vs 3
  • 2.54x higher CADR
    Philips 4000i Series AC4236/10 provides a higher clean air delivery rate than the average air purifier (610 m³/h vs 240 m³/h).
  • 109 m² larger room area
    Philips 4000i Series AC4236/10 covers a larger room area than the average air purifier (158 m² vs 49 m²).
  • 22.5 W higher power
    Philips 4000i Series AC4236/10 has a higher power output than the average air purifier (60 W vs 37.5 W).
  • Supports 360° purification
    Philips 4000i Series AC4236/10 supports 360° purification; the average air purifier does not.
  • 1 more fan speeds
    Philips 4000i Series AC4236/10 provides more fan speed settings than the average air purifier (4 vs 3).
  • Supports Wi‑Fi
    Philips 4000i Series AC4236/10 supports Wi‑Fi; the average air purifier does not.
  • Has ECARF certification
    Philips 4000i Series AC4236/10 has ECARF certification; the average air purifier does not.
  • Supports voice control
    Philips 4000i Series AC4236/10 supports voice control; the average air purifier does not.

Total
Overall
Performance
Features
  • 4 dB higher maximum noise level
    Philips 4000i Series AC4236/10 runs louder at maximum speed than the average air purifier (57 dB vs 53 dB).
  • No timer
    Philips 4000i Series AC4236/10 does not have a timer; the average air purifier does.
  • 61.9% higher weight
    Philips 4000i Series AC4236/10 is heavier than the average air purifier (7.4 kg vs 4.57 kg).
  • 8.6 cm greater depth
    Philips 4000i Series AC4236/10 is deeper than the average air purifier (30.6 cm vs 22 cm).
  • 20.5 cm taller height
    Philips 4000i Series AC4236/10 is taller than the average air purifier (70.5 cm vs 50 cm).
  • 3.3 cm wider width
    Philips 4000i Series AC4236/10 is wider than the average air purifier (30.6 cm vs 27.3 cm).
  • 34756.36 cm³ larger external volume
    Philips 4000i Series AC4236/10 has a larger overall volume than the average air purifier (66013.4 cm³ vs 31257.025 cm³).
  • No timer
    Philips 4000i Series AC4236/10 does not have a timer; the average air purifier does.
    What it is: A programmable shut-off countdown timer that turns off the air purifier automatically after a set number of hours.
    When it matters: Convenient for running the unit for a specific duration before leaving home or going to bed without wasting electricity.

    Importance: LOW

    Philips 4000i Series AC4236/10 does not have a timer; the average air purifier does.
  • 4 dB higher maximum noise level
    Philips 4000i Series AC4236/10 runs louder at maximum speed than the average air purifier (57 dB vs 53 dB).
    What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).
    When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.

    Importance: HIGH

    Philips 4000i Series AC4236/10 runs louder at maximum speed than the average air purifier (57 dB vs 53 dB).57 dB vs 53 dB
  • 61.9% higher weight
    Philips 4000i Series AC4236/10 is heavier than the average air purifier (7.4 kg vs 4.57 kg).
    What it is: The total physical net weight of the air purifier without packaging, measured in kilograms (kg).
    When it matters: Important if you frequently carry the purifier between rooms, to different floors, or place it on furniture.

    Importance: MEDIUM

    Philips 4000i Series AC4236/10 is heavier than the average air purifier (7.4 kg vs 4.57 kg).7.4 kg vs 4.57 kg
  • 8.6 cm greater depth
    Philips 4000i Series AC4236/10 is deeper than the average air purifier (30.6 cm vs 22 cm).
    What it is: The front-to-back depth measurement of the air purifier, in centimetres (cm).
    When it matters: Determines how far the purifier protrudes outward into walkways or away from walls.

    Importance: LOW

    Philips 4000i Series AC4236/10 is deeper than the average air purifier (30.6 cm vs 22 cm).30.6 cm vs 22 cm
  • 20.5 cm taller height
    Philips 4000i Series AC4236/10 is taller than the average air purifier (70.5 cm vs 50 cm).
    What it is: The vertical height of the air purifier unit, measured in centimetres (cm).
    When it matters: Important for ensuring the unit fits underneath tables, under low window sills, or onto designated shelves.

    Importance: LOW

    Philips 4000i Series AC4236/10 is taller than the average air purifier (70.5 cm vs 50 cm).70.5 cm vs 50 cm
  • 3.3 cm wider width
    Philips 4000i Series AC4236/10 is wider than the average air purifier (30.6 cm vs 27.3 cm).
    What it is: The horizontal width across the front of the air purifier, measured in centimetres (cm).
    When it matters: Essential for confirming the unit fits neatly between furniture, in tight corners, or on compact bedside tables.

    Importance: LOW

    Philips 4000i Series AC4236/10 is wider than the average air purifier (30.6 cm vs 27.3 cm).30.6 cm vs 27.3 cm
  • 57.1% more expensive
    Philips 4000i Series AC4236/10 is more expensive than the average air purifier (£220 vs £140).
    Philips 4000i Series AC4236/10 is more expensive than the average air purifier (£220 vs £140).£220 vs £140
  • 34756.36 cm³ larger external volume
    Philips 4000i Series AC4236/10 has a larger overall volume than the average air purifier (66013.4 cm³ vs 31257.025 cm³).
    What it is: This attribute shows the approximate external volume of the air purifier in cubic centimetres.
    When it matters: It matters when comparing how much physical space different air purifiers occupy.

    Importance: LOW

    Philips 4000i Series AC4236/10 has a larger overall volume than the average air purifier (66013.4 cm³ vs 31257.025 cm³).66013.38 cm³ vs 31257.025 cm³
Total
Overall
Performance
Features
Design

Graphic comparison of Philips 4000i Series AC4236/10 and other products in the Air Purifiers category

Attribute category
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Third-party reviews

United Kingdom
amazon
4.4
893 Reviews

(Reviews last updated: August 2026)

What customers like about Philips 4000i Series AC4236/10?

  • Excellent air purification performance with high CADR (610 m³/h) suitable for large rooms up to 158 m²
  • Extremely quiet operation in sleep/silent mode, making it ideal for night use in bedrooms
  • Provides noticeable relief for allergy and asthma sufferers by effectively filtering dust, pollen, and pet dander
  • Great build quality with a modern, aesthetically pleasing minimalist design
  • Real-time air quality tracking via an intuitive color-coded LED ring and numerical display
  • Smart companion app (Philips Air+) functionality for comprehensive remote monitoring and scheduling
  • Efficient automatic AI mode that scales up instantly when sensors detect poor air quality

What customers dislike about Philips 4000i Series AC4236/10?

  • High cost of genuine replacement filters (FY4440/30)
  • Significant noise level when running on maximum turbo mode
  • Air quality sensors can sometimes respond slowly or lag when detecting instant spikes in smoke or pollutants
  • The device is quite tall (over 70 cm) and lacks physical wheels, making it less convenient to move around despite being relatively lightweight
  • Occasional connectivity issues or lag experienced when pairing the device with the smartphone application

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