This time, I will compare two cylindrical-style air purifiers from Coway: the Airmega 50 and the Airmega 100.
They look almost identical and share most of the same features, but they differ in CADR, motor power, and the results they achieved in our tests.
The Coway Airmega 50 is intended for rooms up to 104 sq. ft. (9.7 m²), while the Coway Airmega 100 is intended for rooms up to 169 sq. ft. (15.7 m²).
Both air purifiers include an air quality sensor, an air quality indicator, and an auto mode.
Our Verdict
The question is: which of these two, almost identical-looking air purifiers should you choose?
In my opinion, I would go with the Coway Airmega 100. It delivered better performance in our tests, has a higher CADR, is more powerful, and also offers a better CADR-to-noise ratio.
If you have any questions about these two air purifiers, feel free to ask in the comments section below the article.
Specs: Coway Airmega 50 Vs Coway Airmega 100
| Product Image |  |  39% off |
| Manufacturer | Coway | Coway |
| Model | Airmega 50 | Airmega 100 |
| Dimensions (inches / cm) | 6.7 x 6.7 x 12.6 inches (17 x 17 x 32 cm) | 8.7 x 8.7 x 15.6 inches (22 x 22 x 39.5 cm) |
| Weight (pounds / kg) | 3.4 lbs (1.6 kg) | 6.6 lbs (3.0 kg) |
| Clean Air Delivery Rate (CADR) | 66.7 CFM (113.3 mÂł/h) | 109 CFM (185 mÂł/h) |
| Coverage (4.8 ACH)
Room Coverage Explanation: ACH is a measurement used in indoor air quality management to indicate how many times the air within a defined space is changed/moved through the filter media.
For more details, visit our ACH calculator tool. | 104 sq. ft. (9.7 m²) | 169 sq. ft. (15.7 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.3 - Average Score (97 products) 9.9 - Best Score (1 products) 1 - Worst Score (1 products) We use the Temtop LKC-1000S laser particle meter to test the particle removal efficiency of every air purifier. It measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI. You can read more about our testing methodology here. | ||
| Filtration Technology | Pre-Filter, HyperCaptive Filter, and Deodorization Filter | Pre-filter, True HEPA Filter, and Deodorization Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Life | up to 8 months | up to 12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 97 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 14W | 25W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 8.8 - Average Score (97 products) 10 - Best Score (2 products) 1.7 - Worst Score (1 products) We measure the power usage at all speeds using an energy meter, after which we calculate how much it would cost to use the device at a particular fan speed for one month. For reference, we use an energy price of $0.12 per kWh. You can read more about our testing methodology here. | ||
| Number of Fan Speeds | 4 - Sleep Mode, Speed 1, Speed 2, and Speed 3 | 4 - Sleep Mode, Speed 1, Speed 2, and Speed 3 |
| Air Quality Sensor Air Quality Sensor Summary: Out of 97 air purifiers tested, only 49 have the air quality sensor. | Yes | Yes |
| Air Quality Indicator | Yes | Yes |
| Auto Mode Auto Mode Summary: Out of 97 air purifiers tested, only 50 have auto mode functionality. | Yes | Yes |
| Smart App Smart App Summary: Out of 97 air purifiers tested, only 28 have smart app functionality. | No | No |
| Voice Control Voice Control Summary: Out of 97 air purifiers tested, only 27 have voice control functionality. | No | No |
| Other Features | Control Panel LockTimer | Night LightDisplay LockTimer |
| Noise Level (low – high) | 40 – 57.1 dBA | 40.3 – 60.9 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.2 - Average Score (97 products) 10 - Best Score (1 products) 7.6 - Worst Score (1 products) We use a special noise measurement tool to test the noise level of the air purifier at all speeds. We measured the noise level on the dBA scale. You can read more about our testing methodology here. | ||
| Best Suited For | Bedrooms Low Energy Cost Small Spaces | Bedrooms Small Spaces Dust Allergies Children's Rooms |
| Warranty | 1-year | 3-year |
| In-Depth Review | Coway Airmega 50 | Coway Airmega 100 |
| Price |
Performance Test – Comparison
We tested their airborne particle removal performance using a Temtop laser particle meter in three different rooms.
However, the most important, and definitely the most interesting, test was performed in a 194 sq. ft. (18 m²) room, as this size closely matches the recommended coverage for both devices.
Particle Removal Tests - Comparison
We placed the Coway Airmega 50 and Coway Airmega 100 in two separate tests and measured their performance using the Temtop laser particle meter.
When operating at maximum speed for 60 minutes, the Coway Airmega 50 improved the air quality by 90%, while the Coway Airmega 100 achieved a 93% improvement.
Although the Coway Airmega 100 delivered slightly better results in this test, both devices performed very well and proved to be highly efficient air purifiers.
Noise Level Test – Comparison
As mentioned at the beginning of this comparison, these two Coway models share almost identical features.
The same applies to fan speeds, as both devices offer four fan speed settings.
We measured noise levels at each speed separately using a specialized noise measurement tool.
Noise Levels - Comparison
Comparison of noise levels at all fan speeds between the Coway Airmega 50 and Coway Airmega 100 air purifiers.
The results show that at the lowest speed, the Coway Airmega 50 was slightly quieter, producing 40 dBA, while the Coway Airmega 100 measured 40.3 dBA.
At maximum speed, however, the Coway Airmega 50 proved to be better optimized for noise, which is expected given its smaller motor. It produced 57.1 dBA, whereas the Airmega 100 reached 60.9 dBA.
| Fan Speed | Coway Airmega 50 (dBA) | Coway Airmega 100 (dBA) |
|---|---|---|
| Sleep Mode | 40 dBA | 40.3 dBA |
| Speed 1 (Low) | 41.2 dBA | 41.9 dBA |
| Speed 2 (Medium) | 49.4 dBA | 50.3 dBA |
| Speed 3 (High) | 57.1 dBA | 60.9 dBA |
A closer look at our test data reveals that although the Coway Airmega 50 is slightly better optimized for noise, both devices generate very similar sound levels across most fan speeds.
But the Coway Airmega 100 offers a better CADR-to-noise ratio.
Operating Costs – Comparison
When it comes to power consumption, it’s worth noting that the Coway Airmega 50 uses a motor of just 14W, while the Airmega 100 relies on a slightly more powerful 25W motor.
If you were to run both devices at maximum speed, 24 hours a day for one month, your electricity bill would increase by approximately $1.95 for the Coway Airmega 100 and about $1.01 for the Coway Airmega 50.
Monthly Power Consumption Cost - Comparison
Comparison of monthly power consumption costs for the Coway Airmega 50 and Coway Airmega 100 air purifiers at all fan speeds.
In addition to electricity costs, there is also a cost of replacement filters. The Airmega 50 requires more frequent filter replacements, and the price of its replacement filter is higher than you might expect.
| Fan Speed | Coway Airmega 50 (W + $/month) | Coway Airmega 100 (W + $/month) |
|---|---|---|
| Standby | 0W ($0) | 0.3W ($0.03) |
| Sleep Mode | 0.8W ($0.07) | 2.7W ($0.24) |
| Speed 1 (Low) | 2.8W ($0.25) | 5.2W ($0.46) |
| Speed 2 (Medium) | 6.2W ($0.54) | 9.2W ($0.81) |
| Speed 3 (High) | 11.5W ($1.01) | 22.3W ($1.95) |
Taking all maintenance costs into account, I would say that the Coway Airmega 100 is generally the more affordable option for annual maintenance.
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