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Philips 800i Series AC0850/11 Review | 46 Data compared

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  • Avg. price in UK: ~£150
  • Avg. price in US: ~$140
  • Max. CADR: 190 m³/h
  • Maximum room area: 49 m²
  • Maximum noise level: 49 dB
  • HEPA filter: yes
  • Weight: 3.5 kg

Philips 800i Series AC0850/11 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.

6.9

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%

6.4

Technical Score

20.0%

9.2

User score

Good
6.4

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%

4.7

Performance

40.0%

8.5

Features

10.0%

6.4

Design

Good
9.2

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%

10

Popularity

User score:
United Kingdom
amazon
4.4
(1168)
amazon
4.5
(198)

(Reviews last updated: August 2026)

Exceptional
  • 7.1
    Bedroom use

    Score components:

    35.0%

    5.8

    Maximum noise level

    30.0%

    10

    Night mode

    20.0%

    4.1

    Maximum room area

    15.0%

    8.0

    Weight

  • 7.0
    Allergy relief

    Score components:

    35.0%

    4.1

    Max. CADR

    30.0%

    10

    HEPA filter

    20.0%

    5.5

    Number of filtration stages

    15.0%

    10

    Washable prefilter

  • 7.3
    Smoke removal

    Score components:

    35.0%

    10

    Activated carbon filter

    30.0%

    4.1

    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

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

Verdict

The Philips 800i Series AC0850/11 is a compact air purifier designed for rooms up to 49 m², featuring a Clean Air Delivery Rate (CADR) of 190 m³/h and a 3-layer filtration system consisting of a pre-filter, Active Carbon filter, and a NanoProtect HEPA filter that captures 99.5% of ultra-fine particles down to 0.003 microns. Key advantages include its ability to clear air in a 20 m² room in under 16 minutes, smart sensors that scan the air 1,000 times per second to automatically adjust speeds, an energy-efficient maximum power draw of 20 W, real-time air quality color-ring feedback, and an ultra-quiet sleep mode operating at 19 dB alongside Wi-Fi connectivity for the Philips Air+ app. However, its manual controls offer limited speed configurations (only Sleep, Speed 1, and Turbo), it lacks a built-in timer, and the composite filter must be completely replaced every 12 months rather than allowing individual layer changes.

Technical Specifications of air purifier Philips 800i Series AC0850/11

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%

4.7

Performance

40.0%

8.5

Features

10.0%

6.4

Design

6.4
Philips 800i Series AC850/11 has a technical score of 6.39 points, which is lower than 55.7% 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%

10

Popularity

User score:
United Kingdom
amazon
4.4
(1168)
amazon
4.5
(198)

(Reviews last updated: August 2026)

9.2
Philips 800i Series AC850/11 has a user score of 9.18 points, which is higher than 82.5% 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.
10
Philips 800i Series AC850/11 has a popularity of 10 points, which is higher than 72.7% 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%

6.9

Overall score

40.0%

9.5

Price

7.7
Philips 800i Series AC850/11 has a quality-to-price ratio of 7.7 points, which is higher than 59.6% 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

20 W
Philips 800i Series AC850/11 has a power output of 20 W, which is lower than that of 79.6% of air purifiers and the same as that of 1.7% 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

190 m³/h
Philips 800i Series AC850/11 delivers a CADR of 190 m³/h, which is lower than that of 66.5% of air purifiers and the same as that of 1.9% 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

49 m²
Philips 800i Series AC850/11 covers up to 49 m², which is larger than 47.7% of air purifiers and the same as 2.3% 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

3
Philips 800i Series AC850/11 offers 3 fan speeds, which is more than 6.7% of air purifiers and the same as 48.6% 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

49 dB
Philips 800i Series AC850/11 reaches 49 dB at maximum speed, which is quieter than 73.8% of air purifiers and the same as 7.3% 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 800i Series AC850/11 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 800i Series AC850/11 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 800i Series AC850/11 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 800i Series AC850/11 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

black
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

no
Philips 800i Series AC850/11 does not have 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

N/A
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

buttons, app, voice
Show more

Philips 800i Series AC0850/11 vs the average air purifier

  • Supports Wi‑Fi
    Philips 800i Series AC850/11 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 800i Series AC850/11 supports Wi‑Fi; the average air purifier does not.
  • Has ECARF certification
    Philips 800i Series AC850/11 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 800i Series AC850/11 has ECARF certification; the average air purifier does not.
  • Supports voice control
    Philips 800i Series AC850/11 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 800i Series AC850/11 supports voice control; the average air purifier does not.
  • Supports 360° purification
    Philips 800i Series AC850/11 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 800i Series AC850/11 supports 360° purification; the average air purifier does not.
  • 4 dB lower maximum noise level
    Philips 800i Series AC850/11 runs quieter at maximum speed than the average air purifier (49 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 800i Series AC850/11 runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).49 dB vs 53 dB
  • 13.3 cm shorter height
    Philips 800i Series AC850/11 has a lower height than the average air purifier (36.7 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 800i Series AC850/11 has a lower height than the average air purifier (36.7 cm vs 50 cm).36.7 cm vs 50 cm
  • 23.4% lower weight
    Philips 800i Series AC850/11 is lighter than the average air purifier (3.5 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 800i Series AC850/11 is lighter than the average air purifier (3.5 kg vs 4.57 kg).3.5 kg vs 4.57 kg
  • 14.8% higher user score
    Philips 800i Series AC850/11 has a higher user score than the average air purifier (9.18 vs 8).
    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.
    Philips 800i Series AC850/11 has a higher user score than the average air purifier (9.18 vs 8).9.18 vs 8
  • Supports 360° purification
    Philips 800i Series AC850/11 supports 360° purification; the average air purifier does not.
  • 4 dB lower maximum noise level
    Philips 800i Series AC850/11 runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).
  • Supports Wi‑Fi
    Philips 800i Series AC850/11 supports Wi‑Fi; the average air purifier does not.
  • Has ECARF certification
    Philips 800i Series AC850/11 has ECARF certification; the average air purifier does not.
  • Supports voice control
    Philips 800i Series AC850/11 supports voice control; the average air purifier does not.
  • 13.3 cm shorter height
    Philips 800i Series AC850/11 has a lower height than the average air purifier (36.7 cm vs 50 cm).
  • 23.4% lower weight
    Philips 800i Series AC850/11 is lighter than the average air purifier (3.5 kg vs 4.57 kg).
  • 2.3 cm narrower width
    Philips 800i Series AC850/11 is narrower than the average air purifier (25 cm vs 27.3 cm).

Total
Overall
Performance
Features
Design
  • 17.5 W lower power
    Philips 800i Series AC850/11 has a lower power output than the average air purifier (20 W vs 37.5 W).
  • 20.8% lower CADR
    Philips 800i Series AC850/11 provides a lower clean air delivery rate than the average air purifier (190 m³/h vs 240 m³/h).
  • 0.47 % percentage points lower bacteria elimination
    Philips 800i Series AC850/11 achieves lower certified bacteria elimination than the average air purifier (99.5% vs 99.97%).
  • No timer
    Philips 800i Series AC850/11 does not have a timer; the average air purifier does.
  • No display
    Philips 800i Series AC850/11 does not have a display; the average air purifier does.
  • 3 cm greater depth
    Philips 800i Series AC850/11 is deeper than the average air purifier (25 cm vs 22 cm).
  • 0.2 m shorter power cord
    Philips 800i Series AC850/11 features a shorter power cord than the average air purifier (1.6 m vs 1.8 m).
  • 8319.53 cm³ larger external volume
    Philips 800i Series AC850/11 has a larger overall volume than the average air purifier (22937.5 cm³ vs 31257.025 cm³).
  • 0.47 % percentage points lower bacteria elimination
    Philips 800i Series AC850/11 achieves lower certified bacteria elimination than the average air purifier (99.5% vs 99.97%).
    What it is: The certified laboratory efficiency percentage demonstrating the purifier's ability to eliminate airborne bacteria and microbes.
    When it matters: Reassuring for hygiene-focused households, medical offices, or homes with infants where airborne pathogen reduction is a priority.

    Importance: MEDIUM

    Philips 800i Series AC850/11 achieves lower certified bacteria elimination than the average air purifier (99.5% vs 99.97%).99.5 % vs 99.97 %
  • 17.5 W lower power
    Philips 800i Series AC850/11 has a lower power output than the average air purifier (20 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 800i Series AC850/11 has a lower power output than the average air purifier (20 W vs 37.5 W).20 W vs 37.5 W
  • 20.8% lower CADR
    Philips 800i Series AC850/11 provides a lower clean air delivery rate than the average air purifier (190 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 800i Series AC850/11 provides a lower clean air delivery rate than the average air purifier (190 m³/h vs 240 m³/h).190 m³/h vs 240 m³/h
  • No timer
    Philips 800i Series AC850/11 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 800i Series AC850/11 does not have a timer; the average air purifier does.
  • No display
    Philips 800i Series AC850/11 does not have a display; the average air purifier does.
    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

    Philips 800i Series AC850/11 does not have a display; the average air purifier does.
  • 3 cm greater depth
    Philips 800i Series AC850/11 is deeper than the average air purifier (25 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 800i Series AC850/11 is deeper than the average air purifier (25 cm vs 22 cm).25 cm vs 22 cm
  • 0.2 m shorter power cord
    Philips 800i Series AC850/11 features a shorter power cord than the average air purifier (1.6 m vs 1.8 m).
    What it is: The total physical reach of the supplied electrical power cord, measured in metres (m).
    When it matters: Determines optimal placement flexibility relative to wall power outlets without needing extension cables.

    Importance: LOW

    Philips 800i Series AC850/11 features a shorter power cord than the average air purifier (1.6 m vs 1.8 m).1.6 m vs 1.8 m
  • 8319.53 cm³ larger external volume
    Philips 800i Series AC850/11 has a larger overall volume than the average air purifier (22937.5 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 800i Series AC850/11 has a larger overall volume than the average air purifier (22937.5 cm³ vs 31257.025 cm³).22937.5 cm³ vs 31257.025 cm³
Total
Overall
Performance
Features
Design

Graphic comparison of Philips 800i Series AC0850/11 and other products in the Air Purifiers category

Attribute category
Attribute
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Third-party reviews

United Kingdom
amazon
4.4
1168 Reviews
amazon
4.5
198 Reviews

(Reviews last updated: August 2026)

What customers like about Philips 800i Series AC0850/11?

  • Highly effective at removing allergens, hay fever triggers, and dust particles
  • Great at neutralizing strong cooking odors and smoke smells
  • Ultra-quiet performance when running in sleep/night mode
  • Saves on electricity bills due to low energy consumption (only 20W)
  • Responsive real-time color ring indicator and accurate automated fan adjustments
  • App integration allows for convenient remote scheduling and smart monitoring

What customers dislike about Philips 800i Series AC0850/11?

  • Fan noise gets noticeably loud when running on full turbo mode
  • Initial Wi-Fi configuration and pairing with the Air+ app can be complicated
  • The physical built-in screen/display on the unit is remarkably small
  • Original Philips replacement filters can be expensive over time

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