Coway Airmega 250 Review In 2023: Up The Game But Not The Price

The All-new Coway Airmega 250 purifier is the reiteration from the brand to innovate air cleaning space. It features a reliable and proven 3-stage mechanical HEPA filtration that has become a staple of all Airmega models. Been the higher tier of 150 model, what else can you expect from this relatively thin air cleaner? Is the higher price tag justifiable? What are the pros and cons that you should think about? Find out in our Coway Airmega 250 review below.
online price (US)**
±399.99 $$$/ 7

(annual filter cost ±79)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Coway Airmega 250 Specification

ProductCoway Airmega 250
18.5 x 19.7 x 8.3 in
(47 x 50 x 21.1 cm)
Weight20.5 lb (9.3 kg)
Coverage (up to)930 sq. ft. (86 m2)
Airflow speed
Dust free (CADR)249 cfm (423 m3/h)
Pollen free (CADR)261 cfm (443 m3/h)
Smoke free (CADR)230 cfm (391 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
Washable pre-filter
HEPA filter
- Lifespan
- Replacement cost ($)
Green True HEPA filter
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Activated carbon filter
1 year
Ionizer/ Technologies
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Coway Airmega 250 Max2 Filter
1 year
+- 79
Optional/ Addon
Noise level22 - 54 dB(A)
Power usage level64 W
Timer/ Scheduler1, 4, 8 hours
SensorsPollution sensor
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Key Features

  • 3-stage filtration
  • 3 fan speeds (Low, Medium, High) plus Rapid mode
  • EZ Release Design for Filter Care
  • Washable Pre-filter
  • True HEPA filter - 99.99%/ 0.01 microns
  • Activated Carbon filter
  • Dedicated activated carbon and HEPA filter replacement indicator
  • Smart Mode (Auto, Sleep, Eco)
  • Air quality monitoring (Good, Moderate, Unhealthy, Very Unhealthy)
  • 3 years limited warranty

Design and Usability

Like 150 but need something more powerful? Introducing the all-new 3-stage Coway Airmega 250 air purifier. The sleek and modern exterior comes in a small 18.5 inches in width, 19.7 inches in height, and a slim 8.3 inches in depth. Not only the new design looks cool, it is also very practical and convenient with its EZ release design filter care. Every time there is a need to clean the pre-filter, you can easily slide it out via the top, wash it, and hang it for air dry. No need to pop out the panel like most conventional models. Another benefit of the slide-out mechanism is the increase in air inlets and outlets size so more air will be pulled in at one go. Weight is on the heavy side at a total of 20.5 pounds including filters. You can still move it around for room to room purifying if there is a need to do so. On the whole, Build quality surpasses our requirements with no harmful byproducts detected. Coway Airmega 250 air purifier is UL listed, CARB approved for ozone-free, and comes standard with a 3 years limited warranty.

Easy to use with autonomous centric purification. Coway Airmega 250 purifier runs solely on the top control panel. Choose from manual 3 fan speeds (low, medium, high) or Rapid Mode that runs at maximum power air circulation to counter a deteriorating air quality. In most situations, leave it in auto mode and the air purifier will adapt to its surrounding air quality by running at higher fan speed when a high concentration of pollutants is detected. The top real-time air quality monitor illuminates in blue when air quality is good, green when air quality is moderate, yellow when air quality is unhealthy, and red when air quality is very unhealthy. Sleep mode activates automatically when everything turns dark to reduce noise and converse energy. Auto Off timer can be programmed to turn off the air purifier after 1, 4 or 8 hours. Perfect before you hit the bed. Lastly, there is a separate pre-filter indicator that will remind you to clean the pre-filter and Max2 filter change indicator to remind you to replace the filter annually.

Airflow, Coverage, And CADR

Everyone deserves clean air, especially people that matter to you the most. Coway Airmega 250 can wrap every inch of a 930 square footage of room size at 2 air changes per hour for every 30 minutes. At 4 air changes per hour, it can still cover a healthy 465 square footage of air cleaning space. Ideal for large room sizes such as bedroom, living room, kitchen, basement, garage, workshop, playroom, open spaces office, and nursery home. Just leave it running 24 hours a day and you will be greeted with clean, purified air every time you step foot in a home.

BrandPurifying CoverageFan Speed
Austin Air HealthMate1,500 sq. ft.3
Medify Air MA-1122,500 sq. ft.4
Coway Airmega 300S1,560 sq. ft.3
Rabbit Air MinusA2 SPA-780N815 sq. ft.5
Blueair 605775 sq. ft.3
IQAir HealthPro Plus1,098 sq. ft.6
Clean air delivery rate reflects well on the improved airflow distribution event without accounting for Rapid mode. Coway Airmega 250 CADR outputs a high 249 cfm for dust, 261 cfm for pollen, and 230 cfm for smoke. It is weakest against smoke particles but rests assured, it will remove all indoor pollutants within an hour or so.

Recommended Read

Filters And Performance

Coway Airmega 250 purifier advanced 3-stage HEPA filtration is 100% ozone-free as it only uses mechanical filters. The pre-filter traps PM10 particles including common dust, hair, and lint that would otherwise clog up the HEPA filter. You can reuse the washable pre-filter and should do so every time the pre-filter indicator light is showing. The Green True HEPA filter traps 99.999% fine particles down to 0.01 microns which is smaller than most bacteria and viruses. This includes common pollutants such as lead dust, mold, pollen, mildew, pet dander, and germs. The activated carbon filter neutralizes 99.99% of harmful fumes and odors, cigarette smoke, volatile organic compounds from pesticides, car fuel, and wood fire. The no ozone purification is ideal for an asthmatic or hypersensitive person that needs the most conventional air filtration without any compromisation.

Noise And Energy Usage

With the advantage of auto-sleep mode, Coway Airmega 250 purifiers run silently when it is needed to. Between a whisper quiet 22 decibels to a white noise 54 decibels, you can use it during nighttime when you are trying to get good quality sleep or during work that needs absolute focus. Power consumption peaks at 64 watts which is normal but no problem running it 24/ 7 thanks to the Eco mode. Eco mode will stop the fan from spinning after 10 minutes of consistent, good air quality. Our electricity bill did not spike up at all despite us running Coway Airmega 250 all day for months.
Noise TypeDecibels
Coway Airmega 25022 - 54 dB(A)
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

At less than 300 dollars after discount, Coway Airmega 250 is slightly slotted below the Airmga 300 range but comes with a much slimmer profile. Obviously the updated design is the main reason to choose this over the older models, there are minor drawbacks such as the AQI placement and random fan noise that might put some off. Then again, Coway Airmega 250 is much cheaper to maintain with a recurring filter replacement cost of around 79 dollars annually. Either way, you can't go wrong with the Coway Airmega brand.
The best place to get Coway Airmega 250 is on Amazon as it offers the lowest price, installment plan (T&C), free shipping, bundled deals, and a 30-days hassle-free return policy. You can also purchase from the official website with better stock management but the retail price is less attractive in comparison. Other online retailers do carry the product as well but generally, Amazon is the best place to go.


  • You can easily get one under 300 dollars with plenty of great deals available.
  • Dedicated carbon filter and Green True HEPA filter capture 99.999% of allergens, down to 0.01 microns
  • Sleek, slim, and compact body profile. Fits very well in modern home décor.
  • Smart mode runs autonomously in 3 different modes (Auto/ Sleep/ Mode). Activate Rapid mode for the extra boost of air cleaning power.
  • Precision pre-filter and Max2 filter indicator.
  • 3 programmable timers that can be set before you head to bed or leave for home.
  • 3-year warranty covers everything except filters.


  • The top location air purifier indicator bar is kept out of eyesight. We prefer the old Airmega AQI front placement.
  • Fan will have the occasional wobbling sound when running at high speed. Not a big concern as it will go away eventually.
  • Take its time to contain strong odors unless Rapid mode is turned on.

Verdicts And Ratings

Build Quality



Particle Filtration

Smoke Filtration


Filter Cost



Coway Airmega 250

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.

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