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Blueair Blue Pure 221 Review | 46 Data compared

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  • Avg. price in UK: ~£310
  • Avg. price in US: ~$260
  • Max. CADR: 590 m³/h
  • Maximum room area: 120 m²
  • Maximum noise level: 56 dB
  • HEPA filter: yes
  • Weight: 7 kg

Blueair Blue Pure 221 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.

7.1

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%

7.2

Technical Score

20.0%

6.9

User score

Very good
7.2

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%

7.9

Performance

40.0%

6.8

Features

10.0%

5.0

Design

Very good
6.9

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%

8.4

User reviews

30.0%

3.3

Popularity

User score:
United Kingdom
amazon
4.2
(78)

(Reviews last updated: August 2026)

Good
  • 5.1
    Bedroom use

    Score components:

    35.0%

    3.6

    Maximum noise level

    30.0%

    4.0

    Night mode

    20.0%

    10

    Maximum room area

    15.0%

    4.0

    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

  • 8.2
    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%

    4.0

    Air quality indicator

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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 Blueair Blue Pure 221 is a powerful air purifier designed for large spaces up to 50 m², featuring a 360-degree air intake and proprietary HEPASilent technology that combines electrostatic and mechanical filtration to capture 99.97% of airborne particles down to 0.1 microns. It operates with an AHAM-verified Clean Air Delivery Rate (CADR) of 350 CFM for smoke, dust, and pollen, utilizing a 3-stage system that includes a washable fabric pre-filter, a particle filter, and an activated carbon layer to neutralise odours. Key advantages include an easy-to-use single-button control interface, highly efficient air cleaning performance, customizable pre-filter aesthetics, and whisper-quiet operation at its lowest speed (31 dB). However, its primary disadvantages are the bulky, large dimensions that lack integrated carrying handles, relatively high long-term maintenance costs from replacing filters twice a year, and a built-in ionizer that cannot be manually turned off.

Technical Specifications of air purifier Blueair Blue Pure 221

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%

7.9

Performance

40.0%

6.8

Features

10.0%

5.0

Design

7.2
Blueair Blue Pure 221 has a technical score of 7.17 points, which is higher than 71% 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%

8.4

User reviews

30.0%

3.3

Popularity

User score:
United Kingdom
amazon
4.2
(78)

(Reviews last updated: August 2026)

6.9
Blueair Blue Pure 221 has a user score of 6.86 points, which is lower than 90.2% 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.
3.3
Blueair Blue Pure 221 has a popularity of 3.3 points, which is lower 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%

7.1

Overall score

40.0%

7.9

Price

7.3
Blueair Blue Pure 221 has a quality-to-price ratio of 7.3 points, which is lower than 56.3% 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

61 W
Blueair Blue Pure 221 has a power output of 61 W, which is higher than that of 84.5% of air purifiers and the same as that of 1.1% 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

590 m³/h
Blueair Blue Pure 221 delivers a CADR of 590 m³/h, which is higher than that of 95% 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

120 m²
Blueair Blue Pure 221 covers up to 120 m², which is larger than 87.4% of air purifiers and the same as 1.2% 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
Blueair Blue Pure 221 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

56 dB
Blueair Blue Pure 221 reaches 56 dB at maximum speed, which is louder than 71.3% of air purifiers and the same as 3.1% 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

no
Blueair Blue Pure 221 does not have 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
Blueair Blue Pure 221 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

no
Blueair Blue Pure 221 does not have 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
Blueair Blue Pure 221 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
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

metal
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
Blueair Blue Pure 221 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
Show more

Blueair Blue Pure 221 vs the average air purifier

  • 2.46x higher CADR
    Blueair Blue Pure 221 provides a higher clean air delivery rate than the average air purifier (590 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

    Blueair Blue Pure 221 provides a higher clean air delivery rate than the average air purifier (590 m³/h vs 240 m³/h).590 m³/h vs 240 m³/h
  • 71 m² larger room area
    Blueair Blue Pure 221 covers a larger room area than the average air purifier (120 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

    Blueair Blue Pure 221 covers a larger room area than the average air purifier (120 m² vs 49 m²).120 m² vs 49 m²
  • 23.5 W higher power
    Blueair Blue Pure 221 has a higher power output than the average air purifier (61 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

    Blueair Blue Pure 221 has a higher power output than the average air purifier (61 W vs 37.5 W).61 W vs 37.5 W
  • Supports 360° purification
    Blueair Blue Pure 221 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

    Blueair Blue Pure 221 supports 360° purification; the average air purifier does not.
  • Has a handle
    Blueair Blue Pure 221 has a handle; the average air purifier does not.
    What it is: An integrated carry handle or recessed hand grip built into the chassis for lifting.
    When it matters: Makes transporting the air purifier between bedrooms, living areas, or up and down stairs safer and effortless.

    Importance: LOW

    Blueair Blue Pure 221 has a handle; the average air purifier does not.
  • 0.1 m longer power cord
    Blueair Blue Pure 221 features a longer power cord than the average air purifier (1.9 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

    Blueair Blue Pure 221 features a longer power cord than the average air purifier (1.9 m vs 1.8 m).1.9 m vs 1.8 m
  • 2.46x higher CADR
    Blueair Blue Pure 221 provides a higher clean air delivery rate than the average air purifier (590 m³/h vs 240 m³/h).
  • 71 m² larger room area
    Blueair Blue Pure 221 covers a larger room area than the average air purifier (120 m² vs 49 m²).
  • 23.5 W higher power
    Blueair Blue Pure 221 has a higher power output than the average air purifier (61 W vs 37.5 W).
  • Supports 360° purification
    Blueair Blue Pure 221 supports 360° purification; the average air purifier does not.
  • Has a handle
    Blueair Blue Pure 221 has a handle; the average air purifier does not.
  • 0.1 m longer power cord
    Blueair Blue Pure 221 features a longer power cord than the average air purifier (1.9 m vs 1.8 m).

Total
Performance
Design
  • Lower Manufacturer warranty
    Blueair Blue Pure 221 offers lower Manufacturer warranty than the average air purifier (1 years vs $$$).
  • 3 dB higher maximum noise level
    Blueair Blue Pure 221 runs louder at maximum speed than the average air purifier (56 dB vs 53 dB).
  • No air-quality indicator
    Blueair Blue Pure 221 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    Blueair Blue Pure 221 does not have auto mode; the average air purifier does.
  • No night mode
    Blueair Blue Pure 221 does not have night mode; the average air purifier does.
  • No timer
    Blueair Blue Pure 221 does not have a timer; the average air purifier does.
  • No display
    Blueair Blue Pure 221 does not have a display; the average air purifier does.
  • 11 cm greater depth
    Blueair Blue Pure 221 is deeper than the average air purifier (33 cm vs 22 cm).
  • 53.2% higher weight
    Blueair Blue Pure 221 is heavier than the average air purifier (7 kg vs 4.57 kg).
  • 5.7 cm wider width
    Blueair Blue Pure 221 is wider than the average air purifier (33 cm vs 27.3 cm).
  • 24935.38 cm³ larger external volume
    Blueair Blue Pure 221 has a larger overall volume than the average air purifier (56192.4 cm³ vs 31257.025 cm³).
  • 1.6 cm taller height
    Blueair Blue Pure 221 is taller than the average air purifier (51.6 cm vs 50 cm).
  • No air-quality indicator
    Blueair Blue Pure 221 does not have an air-quality indicator; the average air purifier does.
    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

    Blueair Blue Pure 221 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    Blueair Blue Pure 221 does not have auto mode; the average air purifier does.
    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

    Blueair Blue Pure 221 does not have auto mode; the average air purifier does.
  • No night mode
    Blueair Blue Pure 221 does not have night mode; the average air purifier does.
    What it is: A specialized sleep mode that locks the fan to its quietest low-speed setting and dims or extinguishes all control lights.
    When it matters: Essential for light sleepers and bedrooms, preventing distracting illumination and audible motor hum throughout the night.

    Importance: MEDIUM

    Blueair Blue Pure 221 does not have night mode; the average air purifier does.
  • Lower Manufacturer warranty
    Blueair Blue Pure 221 offers lower Manufacturer warranty than the average air purifier (1 years vs $$$).
    What it is: This attribute shows the air purifier's manufacturer warranty.
    When it matters: It matters if longer manufacturer coverage is important to you.

    Importance: MEDIUM

    Blueair Blue Pure 221 offers lower Manufacturer warranty than the average air purifier (1 years vs $$$).1 years vs 2 years
  • No timer
    Blueair Blue Pure 221 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

    Blueair Blue Pure 221 does not have a timer; the average air purifier does.
  • No display
    Blueair Blue Pure 221 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

    Blueair Blue Pure 221 does not have a display; the average air purifier does.
  • 3 dB higher maximum noise level
    Blueair Blue Pure 221 runs louder at maximum speed than the average air purifier (56 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

    Blueair Blue Pure 221 runs louder at maximum speed than the average air purifier (56 dB vs 53 dB).56 dB vs 53 dB
  • 11 cm greater depth
    Blueair Blue Pure 221 is deeper than the average air purifier (33 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

    Blueair Blue Pure 221 is deeper than the average air purifier (33 cm vs 22 cm).33 cm vs 22 cm
Total
Overall
Performance
Features
Design

Graphic comparison of Blueair Blue Pure 221 and other products in the Air Purifiers category

Attribute category
Attribute
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Third-party reviews

United Kingdom
amazon
4.2
78 Reviews

(Reviews last updated: August 2026)

What customers like about Blueair Blue Pure 221?

  • Highly efficient at rapidly improving overall indoor air quality
  • Excellent at filtering out common allergens, dust, smoke, and pet dander
  • Extremely quiet and barely audible when operating on its lowest fan speed setting
  • Simple and intuitive operation utilizing a single touch-button interface
  • Large 360-degree air intake allows for high airflow and versatile room placement
  • Machine-washable fabric pre-filters catch large particles and add a customizable aesthetic

What customers dislike about Blueair Blue Pure 221?

  • Can become quite loud and distracting when turned up to the highest fan speed setting
  • Lacks integrated smart air quality sensors, automatic modes, and timers on this specific base model
  • High long-term maintenance costs due to expensive replacement filters that need swapping every 6 months
  • Relatively large physical dimensions and lacks a convenient carrying handle for easy portability
  • Utilizes an internal ionisation process that creates small amounts of ozone and cannot be manually turned off

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