Products
Tested using Methodology v1.3.1
Updated Aug 11, 2026 12:46 PM
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Tested using Methodology v1.3.1
Updated Aug 12, 2026 12:53 PM
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HEPA Certified
Yes
Activated Carbon
Pellets
HEPA Certified
No
Activated Carbon
Pellets
Our Verdict
Coway Airmega 400
Sans Air Purifier
The Coway Airmega 400 is simply a better overall unit than the Sans Air Purifier. The Coway has a much higher clean air delivery rate and can operate as a standalone unit in bigger spaces more effectively. While this isn't as significant an upside, the Coway model's primary filter also meets a recognized HEPA testing standard. The Coway's operating noise is lower at all fan speeds, too. With all that being said, the Sans does have a smaller footprint.
Variants
- Airmega 400 (Graphite)
- Airmega 400 (White)
- Air Purifier (Agave)
- Air Purifier (Midnight)
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White
Airmega 400
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White
Air Purifier
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Graphite
Airmega 400
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Agave
Air Purifier
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Midnight
Air Purifier
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Sand
Air Purifier
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Main Differences for
Pets
Pets
Threshold
Pets
8.9
7.9
Particle Filtration Rate
8.9
7.9
Noise
8.8
7.9
Full Comparison
Design
Body
Weight
22.9 lbs (10.4 kg)
10.8 lbs (4.9 kg)
Power Cord Length
85.3" (216.6 cm)
77.4" (196.5 cm)
Wheels
No
No
Footprint
6.0
7.1
Compactness Photo
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Width
14.4" (36.6 cm)
10.0" (25.4 cm)
Depth
14.4" (36.6 cm)
11.6" (29.4 cm)
Height
22.6" (57.3 cm)
20.0" (50.9 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
No
Display On/Off
Yes
Yes
Timer Function
Yes
Yes
Number Of Fan Speeds
4
3
Filter Configuration
Filter Configuration Photo
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Filter Localization Photo
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Compare High-Res
HEPA Certified
Yes
No
Filtration Layers
3 Stage
3 Stage
Activated Carbon
Pellets
Pellets
Performance
Particle Filtration Rate
8.9
7.9
Purification Graph
Preview Graph
Preview Graph
Measured PM1.0 CADR
625 m³/hr (368 CFM)
391 m³/hr (230 CFM)
Recommended Room Size @ Max Fan Speed
53.4 m² (575 ft²)
33.4 m² (359 ft²)
Low-Noise Particle Filtration Rate
7.5
7.3
Purification Graph @ ≤ 45dBA
Preview Graph
Preview Graph
Measured PM1.0 CADR
198 m³/hr (117 CFM)
185 m³/hr (109 CFM)
Fan Speed Used
Speed 1
Med
Recommended Room Size
16.9 m² (182 ft²)
15.8 m² (170 ft²)
Noise
8.8
7.9
Noise Video
Noise @ Lowest Fan Speed
31.6dBA
32.6dBA
Noise @ Highest Fan Speed
60.1dBA
62.9dBA
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White
Airmega 400
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White
Air Purifier
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Graphite
Airmega 400
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Amazon
Agave
Air Purifier
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Amazon
Midnight
Air Purifier
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Amazon
Sand
Air Purifier
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Amazon
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Coway Airmega 400
Sans Air Purifier
Comments
Coway Airmega 400 vs Sans Air Purifier: Main Discussion
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