Coway Air Purifier Airmega 400 Graphite True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator
Coway Air Purifier Airmega 400 Graphite True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator
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Coway

Coway Air Purifier Airmega 400 Graphite True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator

163 ratings
Coway Air Purifier Airmega 400 Graphite True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement IndicatorCoway Air Purifier Airmega 400 Graphite True HEPA Air Purifier 1560 sq ft Coverage Auto Eco Sleep Mode Air Quality Filter Replacement IndicatorCoway Air Purifier Airmega 400 White True HEPA Air Purifier 1560 sq ft Coverage Auto Eco Sleep Mode Air Quality Filter Replacement Indicator
Actual ColorGraphite/Silver

Key item features

  • Large Coverage: Coway Airmega 400 air purifier is designed for large rooms up to 1,560 square feet, cleaning the air at least twice per hour.
  • Dual-Filtration System: Features a Max2 filter combining activated carbon and True HEPA filter, capturing 99.97% of 0.3 micron particles, including pollen and pollutants.
  • Pollution Sensor: Real-time air quality monitoring with a brightly colored LED ring indicating the cleanliness of your indoor air.
  • Five Fan Modes: Offers Smart, Sleep, Low, Medium, and High fan modes, with noise levels nearly silent at lower speeds and a maximum of 43.2 dB at the highest setting.
  • Energy Efficient: Smart mode adapts fan speed based on air quality and lighting conditions, optimizing energy use.
  • Timer Settings: Includes a timer with 1, 2, 4, and 8-hour settings for customizable operation.
  • Filter Indicators: Equipped with indicators for the lifetime of both the washable pre-filter and Max2 filter, ensuring timely maintenance.
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Specs

Filter type, HEPACoverage area, 3120 sq ftClean air delivery rate, 416 CFMContaminants removed, BacteriaMicroparticle performance rating, 0.3 micronBrand, Coway

About this item

Product details

Airmega 400 Graphite is a connected air purifier, that intelligently, effectively and quietly cleans the air in your home. Its dual-filtration system removes 99.97% of particulate matter from the air, while the accompanying pollution indicator allows you to monitor and manage air quality real-time.
  • Coway Airmega 400 room air purifier is designed to accommodate large room sizes up to 1,560 square feet and cleans the air at least two times per hour when used as recommended. Coway Airmega Max2 filter—combined activated carbon and True HEPA filter—captures and reduces up to 99.97% of 0.3 micron particles in the air, including pollen, pollutants and other allergens. It also reduces volatile organic compounds by more than 99% and reduces fumes such as NH3 and CH3CHO. Includes washable and permanent pre-filter to catch larger dust particles.
  • Coway Airmega’s pollution sensor communicates indoor air quality testing in real-time. The brightly colored LED ring lets you know how clean or dirty your indoor air is, every minute of the day. Coway Airmega has five fan modes: Smart, Sleep, Low, Medium and High. Noise level is nearly silent at lower speeds. Max noise at highest setting is 43.2 dB.
  • Coway Airmega is a smart, energy efficient air purifier with a three-setting smart mode to adapt to its surroundings. Fan speed automatically adjusts based on the room’s air quality and lighting conditions to improve air quality. Coway Airmega has a timer with 1, 2, 4 and 8 hour settings, plus indicators for filter lifetime for both the washable pre-filter and Max2 filter.
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Specifications

Filter type

HEPA

Coverage area

3120 sq ft

Clean air delivery rate

416 CFM

Contaminants removed

Bacteria

Warranty

Warranty information

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Customer ratings & reviews

4.6 out of 5 stars
stars
163 ratings148 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars85% (138)
  2. 4 stars5% (8)
  3. 3 stars2% (4)
  4. 2 stars2% (4)
  5. 1 star6% (9)

Reviews summary

Pros

  • : Has a non-intrusive appearance that fits well in living spaces.
  • : Operates at a very low noise level.
  • : Setup process is simple with clear instructions.
  • : Uses effective air purification technology.
  • : Captures various household odors including cooking and smoke smells.

Neutral

  • : Provides effective circulation at a reasonable upfront cost, but filter replacements can be pricey.
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Showing 1-3 of 148 reviews

Apr 3, 2026
Reviewer name: Ted R
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Do Yourself A Favor

Airmega 400 is superior removing dust and small particles from the air. Runs quiet and stylish.

Review from Coway USA
Helpful?4DA6UFF7VAJQ639085205
reply from Customer Service

Thank you for your feedback. We’re glad to hear the Airmega 400 is doing such a great job capturing dust and fine particles while running quietly and looking good in your space. We appreciate you taking the time to share your experience.

Apr 9, 2026
Reviewer name: Martine
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Very good, better fresh air

Excellent machine !! Pur air works very well :) Thanks

Review from Coway USA
Helpful?4DA6UFF7VAJQ639085205
reply from Customer Service

Thank you for the wonderful feedback! We’re thrilled to hear your Airmega 400 is keeping your air fresh and clean. We appreciate you taking the time to share your experience.

Apr 6, 2026
Reviewer name: Isaiah
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Airmega 400

Product works well for large home area. My air mega is set up between the kitchen and the living room and does a good job neutralizing cooking odor.

Review from Coway USA
Helpful?4DA6UFF7VAJQ639085205
reply from Customer Service

Thank you for sharing your experience. We’re glad to hear the Airmega 400 is keeping your large space fresh and helping neutralize cooking odors between your kitchen and living room. We appreciate you taking the time to leave a review.

Current price is $629.99
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Sold and shipped by Sylvane
4.2687224669603525 out of 5 stars
4.3 stars out of 5, based on 454 seller reviews(4.3)
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