Coway HEPA Air Purifiers: Which Airmega Fits Your Room?
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Coway is a Korean appliance maker best known in the United States for its Airmega air purifiers, a lineup that runs from small bedroom units to machines built for a whole open floor. Every model here uses a HEPA filter, which stands for high-efficiency particulate air. In simple terms, HEPA is a dense paper-like filter that traps tiny bits of dust, pollen and pet dander as the fan pulls room air through it. Many Coway models add a carbon filter too, a layer of activated charcoal that soaks up smells and smoke odor rather than particles.
The six models below mainly differ by how much room they are rated to clean: the Airmega 50 covers a bedroom, the Airmega 100 a medium room, the Mighty and Mighty2 a large living area, and the Airmega 250 and 350 step up to big rooms and whole floors with extra modes and sensors.
Coway HEPA Air Purifiers Compared
| Model | Rated room size | Filters named | Weight | Warranty |
|---|---|---|---|---|
| Airmega Mighty AP-1512HH | Up to 1,748 sq ft | HEPA | 12.5 pounds | 3 years |
| Airmega Mighty2 AP-1512N | Up to 1,800 sq ft | HEPA and active carbon | 15.2 pounds | Not listed |
| Airmega 50 | Up to 500 sq ft | HEPA and deodorization | 3.5 pounds | 2 years |
| Airmega 100 | Up to 810 sq ft | HEPA and carbon | 7.5 pounds | 2 years |
| Airmega 350 | Up to 2,640 sq ft in 60 minutes | Pre-filter, activated carbon, HEPA | Not listed | 3 years |
| Airmega 250 | Up to 1,860 sq ft in 60 minutes | Washable pre-filter, activated carbon, HEPA | Not listed | 3 years |
COWAY Air Purifier for Home Up to 1,748 ft²: Airmega Mighty for Living Rooms
Best for: Whole floors and very large rooms
Pros
- Up to 2,640 sq ft in 60 minutes
- Noise as low as 21.6 dB
- Energy Star certified
- Light sensor dims display
Cons
- Largest unit, overkill for bedrooms
- Detects particles down to PM 10 only
Coway
COWAY Air Purifier for Bedroom up to 500 ft², HEPA and Deodorization Filter for Smoke, Allergies, Pet Dander, AQI Monitor, Auto Mode, Filter Indicator, Night Light, 2yr Warranty, Airmega 50 White
Price and specifications are read from the Amazon product page and can change.
COWAY Air Purifier for Bedroom up
Best for: Bedrooms, nurseries and dorm rooms
Pros
- Small 7 x 7 x 12 in body
- Night light
- AQI monitor and Auto mode
- Only 3.5 lb
Cons
- Rated for up to 500 sq ft only
- 2-year warranty
Best for: Living rooms and open plan spaces
Pros
- Rated for up to 1,748 sq ft
- Auto and Eco modes
- Air quality monitor
- 3-year warranty
Cons
- Carbon filter not named in listing
- Coverage time frame not specified
The COWAY Air Purifier for Home Up to 1,748 square feet is the Airmega Mighty, model AP-1512HH(W), in white. According to its listing title, it uses a HEPA filter aimed at smoke, allergies, pet dander and odor, and it includes an air quality monitor, Auto and Eco modes, a timer and a filter indicator. Auto mode means the purifier changes fan speed by itself based on what its sensor reads, and a filter indicator tells you when the filter needs replacing, so you do not have to guess.
It measures 9.6 x 16.8 x 18.3 inches and weighs 12.5 pounds, and it carries a 3-year warranty per the listing. The listing does not say how many minutes it takes to clean the full 1,748 square feet, and it does not name a separate carbon filter in the data we were given, so treat its odor claims as coming from the title only.
This model suits a living room, a family room or a studio apartment where one purifier needs to cover a lot of floor. If you want the newer version of the same idea with carbon filtration spelled out, the Mighty2 below is the next step.
COWAY Airmega Mighty2 Air Purifier for Large Rooms
Coway
COWAY Airmega Mighty2 Air Purifier, Next Gen of AP-1512HH, for Large Room & Home Cleans up to 1,800 ft², IEST certified HEPA and Active Carbon for Allergies, Smoke, Dust, Pets & Mold, AP-1512N(W)
Price and specifications are read from the Amazon product page and can change.
COWAY Airmega Mighty2 Air Purifier
Best for: Upgraders wanting the newer Mighty
Pros
- Rated for up to 1,800 sq ft
- HEPA plus active carbon
- Next gen of AP-1512HH
Cons
- Listing lists few feature details
- Heaviest compact option at 15.2 lb
The COWAY Airmega Mighty2 Air Purifier, model AP-1512N(W), is described in its listing as the next generation of the AP-1512HH. It is rated for large rooms and homes up to 1,800 square feet and uses an IEST certified HEPA filter plus active carbon. The listing targets allergies, smoke, dust, pets and mold.
The product description notes that the HEPA filter complies with the IEST-RP-CC007 standard at speed level 1, as tested by SGS, an independent testing company. That is a formal way of saying an outside lab checked the filter against an industry method. The Mighty2 measures 9.3 x 16.9 x 17.9 inches and weighs 15.2 pounds. The data we have does not list its modes, sensor, timer or warranty, so check the product page if those details matter to you.
Choose the Mighty2 if you want the Mighty size class with carbon filtration named on the box. If you know you want smart modes and a clearly listed filter lineup, the Airmega 250 gives you more documented features.
COWAY Air Purifier for Bedroom up to 500 ft²: Airmega 50 for Small Spaces
The COWAY Air Purifier for Bedroom up to 500 square feet is the Airmega 50, model AP-0425C(W). Its listing names a HEPA filter and a deodorization filter for smoke, allergies and pet dander, along with an AQI monitor, Auto mode, a filter indicator and a night light. AQI stands for air quality index, a simple score that shows whether the air is clean or dusty right now.
At 7 x 7 x 12 inches and 3.5 pounds, it is the smallest and lightest model here, easy to set on a nightstand or dresser. The night light is a thoughtful touch for kids’ rooms. It comes with a 2-year warranty according to the listing.
This is the gift pick for a student, a new parent setting up a nursery or anyone who only needs to clean one bedroom. For a bigger room or a home office that doubles as a guest room, move up to the Airmega 100. If you are comparing across brands for a whole house, our roundup of HEPA air purifiers for the home is a helpful next read.
COWAY Air Purifiers for Home up to 810 ft²: Airmega 100 for Medium Rooms
Best for: Large rooms needing fast cleanups
Pros
- 930 sq ft in 30 minutes
- Washable pre-filter
- Rapid and Smart modes
- 3-year warranty
Cons
- Less coverage than Airmega 350
- Uses 64 watts
Coway
COWAY Air Purifiers for Home up to 810 ft², HEPA and Carbon Filter for Smoke, Allergies, Pet Dander, Odor, AQI Monitor, Auto Mode, Timer, Filter Indicator, Night Light, 2yr Warranty, Airmega 100 White
Price and specifications are read from the Amazon product page and can change.
COWAY Air Purifiers for Home up
Best for: Medium rooms and home offices
Pros
- Rated for up to 810 sq ft
- HEPA and carbon filter
- Timer and night light
Cons
- 2-year warranty
- Too small for open plan homes
The COWAY Air Purifiers for Home up to 810 square feet listing is the Airmega 100, model AP-0823E. It uses a HEPA and carbon filter for smoke, allergies, pet dander and odor and adds an AQI monitor, Auto mode, a timer, a filter indicator and a night light, with a 2-year warranty.
It measures 8.66 x 8.66 x 15.55 inches and weighs 7.5 pounds, so it is still easy to move from room to room. Compared with the Airmega 50, it covers well over double the rated floor area and adds a timer, which lets you run it for a set time before it switches off.
The Airmega 100 fits a larger bedroom, a home office or a small living room. Households with shedding pets may also like our guide to a pet hair air purifier. For open plan spaces, the Mighty models or the Airmega 250 make more sense.
COWAY Air Purifier for Large Room: Airmega 350 for Whole Floors
The COWAY Air Purifier for Large Room use is the Airmega 350, the biggest coverage in this list. Its HyperVortex system is listed as cleaning spaces up to 2,640 square feet in 60 minutes, and the listing gives CADR figures of Dust 376, Smoke 352 and Pollen 450. CADR, or clean air delivery rate, measures how much filtered air the purifier pushes out, and higher numbers mean faster cleaning.
It uses a 3-in-1 system: a vacuumable pre-filter to catch hair and big dust, activated carbon for odors, and a HEPA filter that the listing says reduces up to 99.97% of particles down to 0.3 microns. A real-time air quality monitor detects particles as small as PM 10, Auto mode adjusts fan speed, and a light sensor turns off the display light to avoid disturbing bedtime. The listing gives noise as low as 21.6 dB in the features and 21.5 dB in the specifications, a small mismatch, but both describe a very quiet low setting. It is Energy Star certified, draws 62 watts, has touch controls and a 3-year warranty.
Pick the Airmega 350 for an open plan main floor or a large great room. It is more machine than a single bedroom needs, where the Airmega 50 or 100 is the better fit.
COWAY Air Purifiers for Home Large Room: Airmega 250 for Fast Cleanups
The COWAY Air Purifiers for Home Large room listing is the Airmega 250. It is optimized to clean up to 930 square feet in 30 minutes or up to 1,860 square feet in 60 minutes. Its HyperCaptive filtration combines a washable pre-filter, an activated carbon filter and a HEPA filter, which the listing says reduces 99.97% of 0.3 micron particles and 99% of volatile organic compounds, the chemical fumes that come from paints, cleaners and cooking.
The Airmega 250 has a 24/7 air quality indicator, Smart mode that adjusts fan speed to the air, and Rapid mode that runs at maximum power until the air is clean, useful after cooking or when guests bring a pet. It also has a timer, a filter life indicator, touch controls, a listed noise level of 22 dB and a 64-watt draw, plus a 3-year warranty.
The 250 suits large living rooms and families who want quick cleanups. It covers less floor than the Airmega 350, so for a whole open floor the 350 is the stronger pick.
How to Choose the Right Coway HEPA Air Purifier
Measure the room first. Multiply length by width in feet to get square feet. Under 500 square feet points to the Airmega 50; up to about 800 points to the Airmega 100; large living areas point to the Mighty, Mighty2 or Airmega 250; whole floors point to the Airmega 350. Note that only the 250 and 350 listings state a time frame for their coverage.
Decide how much you care about odor. Carbon is what tackles smells. The Mighty2, Airmega 100, 250 and 350 name carbon in their listings, and the Airmega 50 names a deodorization filter. The original Mighty listing we have names HEPA only.
Look at the extras. Night lights appear on the Airmega 50 and 100, a light sensor on the 350, and Rapid mode on the 250. A washable or vacuumable pre-filter on the 250 and 350 can help homes with pets.
Consider size and warranty. The Airmega 50 is only 3.5 pounds, while the Mighty2 is 15.2 pounds. Warranties run 2 years on the 50 and 100 and 3 years on the Mighty, 250 and 350. If you want to compare other brands before deciding, see our picks of air purifiers for the home.
FAQ
Which Coway air purifier should I buy for a bedroom?
The Airmega 50 is rated for up to 500 square feet and has a night light, making it the natural bedroom pick. A larger bedroom or a combined bedroom and office may suit the Airmega 100.
What is the difference between the Airmega Mighty and the Mighty2?
The Mighty2 is listed as the next generation of the AP-1512HH. It is rated for up to 1,800 square feet versus 1,748, and its listing names both HEPA and active carbon. The original Mighty listing names Auto and Eco modes, a timer and a 3-year warranty, details not given in the Mighty2 data.
Do Coway purifiers help with pet dander and smoke?
The listings for every model mention pet dander, smoke or both. HEPA filters trap dander particles, while carbon filters handle smoke odor, so models naming carbon are better for smells.
Is the Airmega 350 quiet enough for night use?
Its listing gives a low noise level of about 21.5 to 21.6 dB and a light sensor that turns off the display light, both aimed at bedtime comfort.
Can I wash the filters?
The Airmega 250 has a washable pre-filter and the Airmega 350 has a vacuumable pre-filter. HEPA and carbon filters are replaced, not washed, and the filter indicator tells you when.
Does a bigger purifier work in a small room?
Yes, it will clean a small room quickly, but it takes more space and may be more machine than you need. Matching the rated area to your room is the simplest way to choose.
