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Dyson Purifier Big+Quiet Formaldehyde BP04 vs Blueair Blue Signature Large

Which Air Purifier Is Better?

    Top
    Main Differences
    Design
      BodyDisplay And ControlFilter Configuration
    Performance
      Particle Filtration RateLow-Noise Particle Filtration RateNoise
    Comments

Products

Dyson Purifier Big+Quiet Formaldehyde BP04
Blueair Blue Signature Large 
early access

Tested using Methodology v1.2

Updated Apr 29, 2026 09:25 PM

SEE PRICE
BestBuy.com

Tested using Methodology v1.2

Updated Jun 02, 2026 03:03 PM

This review is in Early access

SEE PRICE
BestBuy.com
Dyson Purifier Big+Quiet Formaldehyde BP04 Picture

Track

Blueair Blue Signature Large Picture

Track

Activated Carbon
Sheet
Activated Carbon
Sheet

Our Verdict

Dyson Purifier Big+Quiet Formaldehyde BP04

Blueair Blue Signature Large

Full comparison details regarding individual product score sets can be found in the section below

GIFT THIS COMPARISON

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Variants

  • Purifier Big+Quiet Formaldehyde BP03 (Bright Nickel/Prussian Blue)
  • Purifier Big+Quiet Formaldehyde BP04 (Prussian Blue/Gold)
  • Blue Signature Large (Nordic Fog)

Review

See Dyson Purifier Big+Quiet Formaldehyde BP04 Review
See Blueair Blue Signature Large Review
4 
0 

Check Price

Bright Nickel/Prussian Blue
Purifier Big+Quiet Formaldehyde BP03
SEE PRICE
BestBuy.com
Nordic Fog
Blue Signature Large
SEE PRICE
BestBuy.com
Prussian Blue/Gold
Purifier Big+Quiet Formaldehyde BP04
SEARCH
Amazon
Nordic Fog
Blue Signature Large
SEARCH
Amazon
 
Nordic Fog
Blue Signature Large
SEARCH
Walmart.com
 
Nordic Fog
Blue Signature Large
SEARCH
Lowes.com
 
Nordic Fog
Blue Signature Large
SEARCH
HomeDepot.com

Main Differences for
Pets

Threshold 

0.10

Pets 
 

7.8
0.0
No major differences between these air purifiers for pets. See full list of tests below.

Full Comparison

Design

Body  

Air Purifier Design Photo  

Compare High-Res
Dyson Purifier Big+Quiet Formaldehyde BP04 Air Purifier Design Photo
Blueair Blue Signature Large Air Purifier Design Photo Sample

SAMPLE

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for pictures & test results

Height  

32.7" (83.0 cm)
Lock" (Lock cm)

Width  

16.3" (41.5 cm)
Lock" (Lock cm)

Depth  

17.1" (43.5 cm)
Lock" (Lock cm)

Weight 
 

25.1 lbs (11.4 kg)
Lock lbs (Lock kg)

Power Cord Length  

72.8" (185.0 cm)
Lock" (Lock cm)

Wheels 
 

Yes
Locked

Display And Control 
 

Main Controls  

Compare High-Res
Dyson Purifier Big+Quiet Formaldehyde BP04 Main Controls
Blueair Blue Signature Large Main Controls Sample

SAMPLE

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for pictures & test results

Alternative Controls  

Compare High-Res
Dyson Purifier Big+Quiet Formaldehyde BP04 Alternative Controls
Blueair Blue Signature Large Alternative Controls Sample

SAMPLE

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for pictures & test results

Filter Change Indicator 
 

Yes
Locked

Air Quality Sensor Auto Mode 
 

Yes
Locked

Remote Control 
 

Yes
Locked

App 
 

Yes
Locked

Display On/Off 
 

Dimmable only
Locked

Timer Function 
 

Yes
Locked

Number Of Fan Speeds 
 

10
Lock

Filter Configuration  

Filter Configuration Photo  

Compare High-Res
Dyson Purifier Big+Quiet Formaldehyde BP04 Filter Configuration Photo
Blueair Blue Signature Large Filter Configuration Photo Sample

SAMPLE

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for pictures & test results

Filter Localization Photo  

Compare High-Res
Dyson Purifier Big+Quiet Formaldehyde BP04 Filter Localization Photo
Blueair Blue Signature Large Filter Localization Photo Sample

SAMPLE

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for pictures & test results

Filtration Layers 
 

3 Stage
Locked

Activated Carbon 
 

Sheet
Locked
Performance

Particle Filtration Rate 
 

7.5
N/A

Purification Graph  

 Preview Graph
Dyson Purifier Big+Quiet Formaldehyde BP04 Purification Graph
Blueair Blue Signature Large Purification Graph Sample

SAMPLE

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for pictures & test results

Measured PM1.0 CADR 
 

329 m³/hr (193 CFM)
Lock m³/hr (Lock CFM)

Recommended Room Size @ Max Fan Speed 
 

28.1 m² (302 ft²)
Lock m² (Lock ft²)

Low-Noise Particle Filtration Rate 
 

8.3
N/A

Purification Graph @ ≤ 45dBA  

 Preview Graph
Dyson Purifier Big+Quiet Formaldehyde BP04 Purification Graph @ ≤ 45dBA
Blueair Blue Signature Large Purification Graph @ ≤ 45dBA Sample

SAMPLE

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for pictures & test results

Measured PM1.0 CADR 
 

329 m³/hr (193 CFM)
Lock m³/hr (Lock CFM)

Fan Speed Used 
 

Speed 10
Locked

Recommended Room Size 
 

28.1 m² (302 ft²)
Lock m² (Lock ft²)

Noise 
 

8.8
N/A

Noise Video  

Blueair Blue Signature Large Noise Video Sample

SAMPLE

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for videos & test results

Noise @ Lowest Fan Speed 
 

33.4dBA
LockdBA

Noise @ Highest Fan Speed 
 

47.6dBA
LockdBA

Check Price

Bright Nickel/Prussian Blue
Purifier Big+Quiet Formaldehyde BP03
SEE PRICE
BestBuy.com
Nordic Fog
Blue Signature Large
SEE PRICE
BestBuy.com
Prussian Blue/Gold
Purifier Big+Quiet Formaldehyde BP04
SEARCH
Amazon
Nordic Fog
Blue Signature Large
SEARCH
Amazon
 
Nordic Fog
Blue Signature Large
SEARCH
Walmart.com
 
Nordic Fog
Blue Signature Large
SEARCH
Lowes.com
 
Nordic Fog
Blue Signature Large
SEARCH
HomeDepot.com
Back to Top

Dyson Purifier Big+Quiet Formaldehyde BP04

Blueair Blue Signature Large

Comments

  1. Comparison
 • Posted 2 hours ago

Dyson Purifier Big+Quiet Formaldehyde BP04 vs Blueair Blue Signature Large: Main Discussion

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