REASONS TO BUY
Good purifying performance
Nice features
Decent operating cost
REASONS TO AVOID
Somewhat loud
Only one filter option
No child lock
Coway Airmega 200M Review
A reliable and highly effective air purifier, only hampered by a lack of filter options and noise levels on the highest setting
Credit: Coway
By Genaveve Bradshaw ⋅ Senior Review Analyst ⋅ October 25, 2024
Contributions From: Buck Yedor & Ryan White
RELATED: The Best Air Purifiers of 2025
Our Verdict
The Coway Airmega 200M is capable of producing very clean air daily for medium-sized rooms at a relatively low annual operating cost. Thanks to the high-contrast tactile buttons, the user interface is straightforward to navigate, and the features are simple to utilize. We liked this air purifier overall, but it falls in the middle of the pack in many aspects. There is no app connectivity, which is fine if you don't want a smart device, but there's also nothing this device offers that isn't available in many other higher-performing models. We also disliked the sound levels when on the highest setting, as it sounded more like an AC unit than a typical air purifier. However, once you dial it down to the medium setting, it's not nearly as loud. While this model does a good job at its core function and is super easy to use, it's not going to wow anyone like the top performers in our air purifier review.
Our Analysis and Test Results
We enjoyed accessing the functionality of the Coway Airmega 200M thanks to the friendly user interface. It cleans the air really well, too. If you're in need of a no-frills, straightforward device, this could be it.
The Airmega 200M offers high air cleaning performance at a reasonable cost.
Credit: Natalie Kafader
Air Cleaning Performance
The first thing we looked at when rating each machine was to check their respective CADR (clean air delivery rate). The Airmega 200M has a CADR of 246 cubic feet per minute for dust, 240 for pollen, and 233 for smoke. While not the highest, it ranks pretty far up the list in terms of CADR number, making this a good choice for medium to large spaces.
During our smoke test, after checking the Dylos Air Quality Meter reading, we observed that the Coway Airmega 200M managed to clear out 100% of the harmful large particles from the air within the given hour. The room was noticeably clear of smoke, but the bad smells lingered even after 60 minutes. We would have liked to see a better result for odor elimination, but apart from that, it did a good job here.
The Airmega 200M was able to remove all but .1% of measurable particulates from our testing room.
Credit: Genaveve Bradshaw
Noise
To take the bias out of what we thought was a noisy machine, we measured the actual sound output of each model with a decibel reader. The Airmega 200M is one of the loudest of any of the other machines we tested. When set to high, it emits a noise that measures up to 59.5 decibels, which we found to be distracting and somewhat annoying. When set to medium, the noise is reduced significantly, only producing 40 decibels, which was in line with most other models. When set to low, it produced 10 decibels, which is virtually silent.
When set to high, the Airmega is quite loud.
Credit: Natalie Kafader
Ease of Use
The Airmega 200M was simple to set up. You'll need to replace the HEPA-grade filter once a year and the deodorizer filter every six months to keep the air quality optimal, which is fairly standard. But, you'll need to clean the pre-filter every 2-4 weeks, depending on how dirty it gets.
The Coway Airmega 200M is straight forward to use thanks to the clean interface.
Credit: Natalie Kafader
The user interface is straightforward to use. This unit is equipped with an air quality monitor and a large range of settings, which includes an automatic mode based on the room's air quality. It weighs in at just over 12 pounds; it's a little heavy, but its built-in handles make it easy to move it around should you need to.
Removing the front panel on the Coway Airmega 200M can be a bit of a struggle for some.
Credit: Natalie Kafader
Operating Cost
To estimate the annual operating costs of each model, we hooked them up to a watt meter and determined how many kilowatts per hour they utilized. The Airmega 200M is pretty energy efficient, only using .01 kilowatts per two hours of use. Assuming 12 hours of daily use, that's 21.9 kilowatts per year. Multiplied by the national average cost of electricity, your yearly electric bill to run this model is around $3.01.
The Airmega 200M filter should last you about a year. When you factor in the original purchase price, energy consumption, and the cost of replacing filters, this air purifier has one of the best annual costs at just $96 per year. For comparison, some of the most expensive air purifiers we tested cost up to $270 per year.
The cost of replacing the HEPA filter is roughly $60.
Credit: Natalie Kafader
Should You Buy the Coway Airmega 200M?
The Coway Airmega is relatively inexpensive to maintain and keep running, and does a fairly good job of clearing the air of particulates. Other than the loudness of the high setting and a few nit-picks, this is a solid device. On the other hand, it doesn't do much to stand out from its peers. We can't fully recommend it above others we've tested unless the aspects mentioned above appeal to you, and you don't need smart functionality.
What Other Air Purifiers Should You Consider?
We think the Coway Airmega 400S is a great choice. It is considerably more expensive to purchase and operate, but it also has a much larger coverage area. If you want something with slightly better purifying ability and don't need the extended coverage of a larger model, the Blueair 311i Max should be a contender. It will cost a little more to run on a yearly basis, though.
Side-by-Side Comparison
Compare Coway Airmega 200M versus top competing products:
—Genaveve Bradshaw, Buck Yedor, and Ryan White
You Might Also Like
