This year, I decided to review as many air purifiers as possible from reliable and trustworthy brands. One of those brands is Coway, and two new models I tested are the Coway Airmega 150 and Airmega 100.
The first significant difference between these two air purifiers lies in their CADR values. The Coway Airmega 150 has a CADR of 152.8 CFM (259.6 mÂł/h), while the Coway Airmega 100 has a CADR of 109 CFM (185 mÂł/h).
Both air purifiers have only essential features but come equipped with a built-in air quality sensor, air quality indicator, and auto mode.
While both are well-built and excellent devices, there are still huge differences between them — which I’ll highlight in detail throughout this article.
Our Verdict
This was truly a tight battle, and choosing the winner wasn’t an easy task for me.
However, I’d say the Coway Airmega 150 has slightly more to offer. It features a higher CADR, a washable pre-filter, and (in some variants, such as the EU version) a pellet-based carbon filter. In my opinion, it also looks much more modern.
The Coway Airmega 100 is also a well-performing, reasonably priced air purifier that’s definitely worth the money, and you won’t go wrong if you choose it instead.
If you have any questions about these two air purifiers, feel free to ask in the comments section below the article.
Specs: Coway Airmega 150 Vs Coway Airmega 100
| Product Image |  |  8% off |
| Manufacturer | Coway | Coway |
| Model | Airmega 150 | Airmega 100 |
| Dimensions (inches / cm) | 13.4 x 6.5 x 18.5 inches (34 x 16.5 x 47 cm) | 8.7 x 8.7 x 15.6 inches (22 x 22 x 39.5 cm) |
| Weight (pounds / kg) | 12.1 lb (5.5 kg) | 6.6 lbs (3.0 kg) |
| Clean Air Delivery Rate (CADR) | 152.8 CFM (259.6 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. | 237 sq. ft. (22 m²) | 169 sq. ft. (15.7 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.3 - Average Score (91 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, Carbon Filter, and True HEPA Filter | Pre-filter, True HEPA Filter, and Deodorization Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Life | up to 12 months | up to 12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 91 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 35W | 25W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (91 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 | 3 - Silent Mode, Speed 1, and Speed 2 | 4 - Sleep Mode, Speed 1, Speed 2, and Speed 3 |
| Air Quality Sensor Air Quality Sensor Summary: Out of 91 air purifiers tested, only 44 have the air quality sensor. | Yes | Yes |
| Air Quality Indicator | Yes | Yes |
| Auto Mode Auto Mode Summary: Out of 91 air purifiers tested, only 45 have auto mode functionality. | Yes | Yes |
| Smart App Smart App Summary: Out of 91 air purifiers tested, only 26 have smart app functionality. | No | No |
| Voice Control Voice Control Summary: Out of 91 air purifiers tested, only 25 have voice control functionality. | No | No |
| Other Features | Washable Pre-filter | Night LightDisplay LockTimer |
| Noise Level (low – high) | 40.1 – 59.2 dBA | 40.3 – 60.9 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (91 products) 10 - Best Score (1 products) 8.2 - 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 Allergies Small Spaces Dust Low Energy Cost | Bedrooms Small Spaces Dust Allergies Children's Rooms |
| Warranty | 3-year Limited | 3-year |
| In-Depth Review | Coway Airmega 150 | Coway Airmega 100 |
| Price |
Performance Test – Comparison
While their room coverage differs significantly, their results in our performance tests in a 194 sq. ft. (18 m²) room were almost identical.
The Coway Airmega 150 improved the air quality in this room by 94%, while the Coway Airmega 100 also delivered an excellent result, improving it by about 93%.
Based on these tests, I can confidently say that both air purifiers achieved outstanding results in our airborne particle removal tests.
Particle Removal Tests - Comparison
We placed the Coway Airmega 150 and Coway Airmega 100 in two separate tests and measured their performance using the Temtop laser particle meter.
However, the Coway Airmega 150 is the more powerful unit, and I’m sure it will perform better in rooms larger than 194 sq. ft. (the size of the room we used for testing).
Additionally, it offers an option for a pellet-based carbon filter, which makes it more efficient at odor adsorption than the Coway Airmega 100.
Overall, I’d say the Airmega 150 is the more efficient purifier.
Noise Level Test – Comparison
The first thing that surprised me was that the Coway Airmega 100 has more fan speeds than the Airmega 150.
It has four fan speeds, while the Airmega 150 has only three. Both air purifiers also include a sleep mode.
We measured their noise levels at all speeds using a professional sound level meter.
At the lowest speeds (sleep modes), both are very quiet — the Airmega 150 produces 40.1 dBA, while the Airmega 100 measures 40.3 dBA.
Noise Level Comparison
Comparing the Coway Airmega 150 and Coway Airmega 100 noise levels at minimum and maximum speeds.
At the maximum speed, the Coway Airmega 150 produces 59.2 dBA, and the Airmega 100 reaches 60.9 dBA.
Although their noise levels are nearly identical, and even though the Coway Airmega 100 has one extra fan speed, I still consider the Coway Airmega 150 the better option for noise — especially when factoring in the CADR-to-noise ratio.
Operating Costs – Comparison
Both air purifiers are well optimized for power consumption. The Airmega 150 uses a 35W motor, while the Coway Airmega 100 is equipped with a 25W motor.
We measured their power usage at all fan speeds, but the most relevant comparison is at the maximum speed — where the Airmega 150 consumes 28.7W and the Airmega 100 consumes 22.3W.
If you were to run these air purifiers continuously at their maximum speeds, 24 hours a day for one month, your electricity bill would increase by about $2.52 for the Airmega 150 and about $1.95 for the Airmega 100.
Power Usage Comparison
Comparing the Coway Airmega 150 and Coway Airmega 100 power use at minimum and maximum speeds.
Additionally, both air purifiers require a replacement filter roughly once a year.
Considering all operating and maintenance costs, I’d say the Coway Airmega 100 is slightly better optimized for annual upkeep.
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