Today’s article focuses on two small air purifiers: the Coway Airmega 100 and the Philips 600i.
Philips and Coway are well-known brands in the air purifier market, both recognized for producing some of the best-performing and most popular air purifiers available today.
The Coway Airmega 100 and Philips 600i are compact air purifiers with simple filtration systems and just a few advanced features. However, they stand out due to their small footprint, good performance, and good price.
Keep reading to see how they performed in our tests, which one is louder, and which one is more power-efficient.
Our Verdict
This comparison wasn’t as close as I initially expected.
The Coway Airmega 100 features a much higher-quality filter, a slightly higher CADR, and significantly better performance in our tests.
Additionally, it offers more advanced features, operates more quietly, and is more cost-effective to maintain.
Considering all these factors, the Coway Airmega 100 is the better buying option over the Philips 600i Series.
If you have any questions about these two devices, feel free to leave a comment.
Specs: Coway Airmega 100 Vs Philips 600i
| Product Image |  |  |
| Manufacturer | Coway | Philips |
| Model | Airmega 100 | 600i Series |
| Dimensions (inches / cm) | 8.7 x 8.7 x 15.6 inches (22 x 22 x 39.5 cm) | 9.6 x 9.3 x 13.4 inches (24.3 x 23.7 x 34.1 cm) |
| Weight (pounds / kg) | 6.6 lbs (3.0 kg) | 4.9 lb (2.2 kg) |
| Clean Air Delivery Rate (CADR) | 109 CFM (185 m³/h) | 100 CFM (170 m³/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. | 169 sq. ft. (15.7 m²) | 156 sq. ft. (14.5 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.4 - Average Score (79 products) 9.8 - Best Score (2 products) 2.5 - Worst Score (2 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, True HEPA Filter, and Deodorization Filter | Pre-filter and NanoProtect HEPA 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 79 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 25W | 12W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (79 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, and Speed 3 | 3 - Sleep Mode, Medium, and Turbo |
| Air Quality Sensor Air Quality Sensor Summary: Out of 79 air purifiers tested, only 39 have the air quality sensor. | Yes | No |
| Air Quality Indicator | Yes | No |
| Auto Mode Auto Mode Summary: Out of 79 air purifiers tested, only 40 have auto mode functionality. | Yes | No |
| Smart App Smart App Summary: Out of 79 air purifiers tested, only 25 have smart app functionality. | No | Yes |
| Voice Control Voice Control Summary: Out of 79 air purifiers tested, only 24 have voice control functionality. | No | Yes |
| Other Features | Night LightDisplay LockTimer | Sleep Mode |
| Noise Level (low – high) | 40.3 – 60.9 dBA | 40.3 – 57.3 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (79 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 Small Spaces Dust Allergies Children's Rooms | Bedrooms Small Spaces Children's Rooms Portable Use |
| Warranty | 3-year | 2-year |
| In-Depth Review | Coway Airmega 100 | Philips 600i Series |
| Price | Check Price on Amazon | Check Price on Amazon |
Performance Test – Comparison
What I find particularly interesting in this comparison is that the Coway Airmega 100 and the Philips 600i Series have almost identical CADR ratings.
The Coway has a CADR of 109 CFM (185 m³/h), while the Philips has a CADR of 100 CFM (170 m³/h). This means the Coway effectively covers rooms up to 169 sq. ft. (15.7 m²), whereas the Philips 600i Series is suitable for rooms up to 156 sq. ft. (14.5 m²).
Particle Removal Tests - Comparison
We placed the Coway Airmega 100 and Philips 600i in two separate tests and measured their performance using the Temtop laser particle meter.
Both devices clean the air 4.8 times per hour within their recommended room sizes.
We tested both models in a 194 sq. ft. (18 m²) room, which slightly exceeds their recommended coverage.
Both devices ran at maximum speed throughout the 60-minute test. During this time, the Coway Airmega 100 improved air quality by approximately 93%, while the Philips 600i achieved around 89%.
It’s clear that the Coway Airmega 100 delivered significantly better results in this test.
Noise Level Test – Comparison
In the noise level test, the first thing to note is that the Coway has four fan speeds, while the Philips has three.
What I found particularly interesting is that both air purifiers produce the exact same noise level at their lowest speed—40.3 dBA.
Noise Level Comparison
Comparing the Coway Airmega 100 Vs Philips 600i noise levels at minimum and maximum speeds.
However, at maximum speed, the Coway is slightly louder at 60.9 dBA, while the Philips 600i produces 57.3 dBA.
In my opinion, both devices are well-optimized for noise and aren’t excessively loud.
However, the Philips 600i is slightly better optimized and operates more quietly, even though its CADR difference is minimal.
Operating Costs – Comparison
The Philips 600i isn’t just better optimized for noise—it also uses a lower-power motor while achieving a similar CADR to the Coway.
The Coway Airmega 100 has a 25W motor, whereas the Philips 600i operates with a 10W motor.
This means that if both devices run 24 hours a day at maximum speed, the Coway would add approximately $1.95 per month to your electricity bill, while the Philips would add about $0.86.
Power Usage Comparison
Comparing the Coway Airmega 100 Vs Philips 600i power use at minimum and maximum speeds.
In addition to consuming less electricity, the Philips 600i also uses slightly more affordable filters.
Considering that the filters for both devices last about a year on average and that the Philips 600i is more energy-efficient, it’s easy to conclude that it is also more cost-effective to maintain than the Coway Airmega 100.
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