Products
Tested using Methodology v1.3.1
Updated Jul 15, 2026 03:55 PM
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Tested using Methodology v1.3.1
Updated Aug 12, 2026 12:49 PM
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HEPA Certified
No
Activated Carbon
Pellets
HEPA Certified
Yes
Activated Carbon
Pellets
Our Verdict
PuroAir 240
Dreo Air Purifier 338S
The Dreo Air Purifier 338S is a better air purifier than the PuroAir 240. They're similarly compact, and both operate quietly, but the Dreo has a higher clean air delivery rate, allowing it to clean larger spaces more effectively. It also offers Wi-Fi connectivity and a companion app for remote control, scheduling, and air quality monitoring, while the PuroAir has no app or remote. Both can automatically adjust fan speed based on air quality, but the Dreo offers stronger overall performance and more convenience features.
Variants
- 240 (Black)
- 240 (Black (2-pack))
- Air Purifier 338S (Black)
- Air Purifier 338S (White)
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Black
240
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Black
Air Purifier 338S
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Black (2-pack)
240
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White
Air Purifier 338S
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Main Differences for
Pets
Pets
Threshold
Pets
6.5
7.1
Particle Filtration Rate
6.0
6.5
Noise
8.4
9.0
Full Comparison
Design
Body
Weight
7.1 lbs (3.2 kg)
5.5 lbs (2.5 kg)
Power Cord Length
64.4" (163.5 cm)
74.2" (188.5 cm)
Wheels
No
No
Footprint
7.9
7.9
Compactness Photo
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Width
8.6" (21.9 cm)
8.3" (21.1 cm)
Depth
8.6" (21.9 cm)
8.3" (21.1 cm)
Height
14.2" (36.0 cm)
14.3" (36.2 cm)
Display And Control
Main Controls
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Alternative Controls
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Filter Change Indicator
Yes
Yes
Air Quality Sensor Auto Mode
Yes
Yes
Remote Control
No
No
App
No
Yes
Display On/Off
Yes
Dimmable only
Timer Function
Yes
Yes
Number Of Fan Speeds
4
6
Filter Configuration
Filter Configuration Photo
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Filter Localization Photo
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HEPA Certified
No
Yes
Filtration Layers
3 Stage
3 Stage
Activated Carbon
Pellets
Pellets
Performance
Particle Filtration Rate
6.0
6.5
Purification Graph
Preview Graph
Preview Graph
Measured PM1.0 CADR
157 m³/hr (92 CFM)
196 m³/hr (115 CFM)
Recommended Room Size @ Max Fan Speed
13.4 m² (144 ft²)
16.7 m² (180 ft²)
Low-Noise Particle Filtration Rate
5.0
5.9
Purification Graph @ ≤ 45dBA
Preview Graph
Preview Graph
Measured PM1.0 CADR
79 m³/hr (47 CFM)
106 m³/hr (62 CFM)
Fan Speed Used
Speed 2
Speed 3
Recommended Room Size
6.8 m² (73 ft²)
9.0 m² (97 ft²)
Noise
8.4
9.0
Noise Video
Noise @ Lowest Fan Speed
33.0dBA
31.2dBA
Noise @ Highest Fan Speed
53.4dBA
56.0dBA
Check Price
Black
240
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Black
Air Purifier 338S
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Amazon
Black (2-pack)
240
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Amazon
White
Air Purifier 338S
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Amazon
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PuroAir 240
Dreo Air Purifier 338S
Comments
PuroAir 240 vs Dreo Air Purifier 338S: Main Discussion
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