COWAY Air Purifiers for Home Large Room Up to 930 ft², Washable Pre-Filter and True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, AQI, App Control, Smart & Rapid Mode, 3yr Warranty, 250S
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 5 left in stock, order soon!
Arrives
Nov 17 – Nov 18
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Style: Airmega 250S
Features
- [Coverage] Optimized to clean spaces up to 930 sq. ft. in 30 minutes or up to 1,860 sq. ft. in 60 minutes
- [HyperCaptive Filtration System] Dynamic combination of a washable pre-filter, activated carbon filter, and Green True HEPA Filter effectively reduces 99.999% of 0.01-micron particles in the air, including pollen, pollutants, and other allergens. It also reduces 99% of volatile organic compounds and odor.
- [Air Quality Indicator] 24/7 pollution monitor air quality throughout the day, adjusting purification to the necessary level and saving energy when it's not needed.
- [Rapid Mode] When air quality is in need of a boost, Rapid Mode is activated to circulate at maximum power until your air is clean.
- [Smart Mode] With its Smart Mode feature, the Airmega automatically adapts to its surroundings by adjusting fan speeds based on the room's air quality. That means your unit in energy efficient without compromising effectiveness.
- [Filter Alerts]The air filter indicator tells you when the filters need to be replaced and the prefilters need to be cleaned for maximum efficiency, based on how much air they have processed.
- [EZ Release Design for Filter Care] The easy-to-clean reusable pre-filter is engineered to quickly slide out for washing and hangs on the unit to speed dry.
- [Timer] Schedule the unit to purify for 1, 4, or 8 hours of use and conserve energy.
- [Warranty] 3-year Limited Manufacturer's Warranty
Description
The Wi-Fi equipped Coway Airmega 250S air purifier efficiently filter harmful sources in your space and capture 99.999% of nano-sized particles down to 0.01 microns, which is smaller than most allergens, bacteria, mold, and viruses. With coverage of up to 930 square feet, Coway’s 3-stage HyperCaptive filtration system (with Green True HEPA filter) wraps any space in clean air, 24 hours a day. Features Coway’s IoCare App, filter change indicators, smart mode, and real-time air quality monitoring. Coway Airmega 250S cleans and maintains spaces up to 930 sq. ft in 30 minutes.
Color: Warm Gray
Brand: Coway
Product Dimensions: 8.3"D x 18.5"W x 19.7"H
Floor Area: 930 Square Feet
Specification Met: CARB Certified, ETL Certified
Color: Warm Gray
Brand: Coway
Product Dimensions: 8.3"D x 18.5"W x 19.7"H
Floor Area: 930 Square Feet
Specification Met: CARB Certified, ETL Certified
Noise Level: 22 Decibels
Particle Retention Size: 0.01 Micron
Wattage: 64 watts
UPC: 826439000394
Special Feature: Air Quality Monitor, Filter Life Indicator, Smart Mode, Wi-Fi Enabled
Manufacturer: Coway
Filter Class: HEPA, Activated Carbon, Pre-Filter
Item Weight: 20.5 pounds
Item model number: AP-1720G
Care instructions: User Manual
Assembly required: No
Number of pieces: 1
Warranty Description: 3 year manufacturer's limited warranty
Batteries required: No
Included Components: Filter Set, User Manual
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 17 – Nov 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: Airmega 250
I needed an air purifier that could handle a large open living/dining/entryway area in my apartment in dusty/smoggy NYC. Since I was already very happy with a smaller capacity Coway purifier (AP-1512HH) in a bedroom, buying the Coway Airmega 250 was a no brainer. I've had the Airmega 250 for over a year now and it has worked flawlessly, quietly (except when it goes into overdrive when I am cooking steak,) and is easy to clean and maintain. First of all, it's fairly nice looking in a simple, unassertive way that is happy to sit quietly in the background. The smaller unit I have in the bedroom is not as attractive, IMHO. Both units are pretty much "plug and play." They both monitor the air, automatically switching to a higher fan speed when indicated. If desired, the "Auto" function can be overridden, so the fan speed can be manually set. The 250 has an automatic "nighttime" setting that goes into a temporary sleep mode if no change of air quality is detected over a period of time. This is great if the unit is in a bedroom, though it will wake itself up if it detects an environmental change. I am almost never aware of the 250, the main exception is when a smoky haze escapes the kitchen, usually when I am grilling or broiling meat. The unit then goes into "Red" alert, the fan switches to "High" and the air is cleared in a matter of minutes. The filtration system is in two parts: a permanent mesh screen "pre-filter" which needs to be dusted or washed periodically, and a HEPA inner filter which can be dusted off, but needs to be replaced at least once a year, or as necessary. A red light goes off when either of the two filters needs cleaning or replacement. I've noticed a significant reduction in settled dust on my furniture surfaces. Highly recommended. EDIT JUNE 10, 2023: This unit went into auto “red alert” as soon as the Canadian wildfire smog started to engulf New York City. We shut our windows and it took the 250 (and our bedroom unit) about an hour to go from red to yellow and back to green. What a relief to have these two units!
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Reviewed in the United States on March 7, 2023 by Wandrwoman
Style: Airmega 450 Beige
I’ve had a variety of air filter machines over the years, this 450 version is the best quality, largest version I’ve ever owned. It’s a beast of an air filter that very well made all the way down to the filter it uses. It’s also the most high-tech as to identifying air quality and adjusting automatically. I put this one in my basement that I am remodeling and it has done a great job of cleaning the air. The initial set up is difficult to figure out. You have to remove main filter and unwrap it, in that process you remove the grill/louver part which is a flexible plastic wrap-around design, and then it’s supposed to just snap back into place and is held by magnets on one side. I’ve yet to get it all lined back up correctly, but it still works. The instructions are of little help in this regard, but once you figure out where to pull at the bottom it comes off easily. A simple sticker the says, “pull here to remove cover” would fix this issue.
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Reviewed in the United States on September 5, 2025 by D. Davidson
Style: Airmega 250S
Looks so good in our space. Is nice and quite, works with smart home for scheduling super easy and has noticeably made a difference with our dust. I rotate it around our 1200sqft apartment for maximum efficiency. Sensor light may be meh but the research I did told me that most are, doesn’t effect the quality of the filter 🙌
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Reviewed in the United States on August 18, 2025 by Gallegos
Style: Airmega 250
Works well, easy to clean BUT, it does NOT work for CIGARETTE SMOKE, as stated by another review. Whether it’s 1st, 2nd, or, 3rd hand smoke, it’s not useful for that in the slightest. Otherwise, it’s a good product.
Reviewed in the United States on August 31, 2025 by Amie
Style: Airmega 350 Beige
The Coway Airmega is amazing! Super quiet, sleek design, and it really makes a difference in air quality. I noticed the air feels fresher within hours, and my allergies have improved a lot. It covers a large area perfectly and the smart features (like air quality indicator and auto mode) make it effortless to use. Filters are easy to change, and the overall build feels high quality. Definitely worth the investment if you care about clean, healthy air at home.
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Reviewed in the United States on September 9, 2025 by Team Dominican Team Dominican
Style: Airmega 250S
Pros: - Does a wonderful job at clearing the air. My apartment does not have a range hood for evacuating cooking smoke, and would often create a haze in my apartment. This powerhouse will recognize the bad air quality quickly and scrub out all the smoke caused by cooking. I purchased a Dyson in parallel to see which I would rather keep, and the 250s actually kept purifying after the Dyson noted “good” air quality. I could tell there was still a bit of smoke and cooking odor, and couldn’t understand why the Dyson didn’t recognize what this unit did. - Great coverage for a unit this size. I previously looked at smaller units to tuck away out of sight, but would have needed 3-4 to cover the area this unit does. - The fan doesn’t have a buzzing of mechanical sound to it, more of a “whooshing” wind, so it’s not offensive when running. - Personally, I love the look of it. I had a Dyson purifier as well (returned it to keep this unit) and it didn’t blend into any design style; this one doesn’t draw attention to itself. - Love the AQI LED on top. Easy to understand: blue (good) fan level 1, green (moderate) and yellow (unhealthy) fan level 2, and red (very unhealthy) fan level 3. - Easy pre-filter cleaning and filter replacement from the hinging front. Cons: - Had a few days of an error with the app connecting (invalid MAC address), but eventually resolved itself (unit is still usable without the app) - App is somewhat less user friendly than say a dyson app - I don’t get any history of PM2.5 pollutants, but have it for PM10 - Fan speed on levels 2 and 3 can be noisy while trying to watch tv/movie or listening to music if the unit is close by (I would love if moderate air quality had a fan speed of 1.5) - No option to silence the chimes, which occur when you change settings on the device or when it moves into a new schedule block
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Reviewed in the United States on March 31, 2022 by Brooklyn Alex Brooklyn Alex