TLDR Review: Coway Airmega 400S
Verdict
The AIRMEGA 400S Air Purifier by Coway is an excellent choice for those needing to purify large spaces and appreciate smart home integration with Alexa. While it boasts strong filtration capabilities and a variety of operational modes, some users have encountered issues with the app and smart features. Overall, it is a solid air purifier for those who prioritize powerful air cleaning and don't mind higher replacement filter costs.
- Top pro:
- Covers a large area of up to 1560 sq. ft.
- Top con:
- Some users reported issues with the app and smart functionality.
Pros
- •Covers a large area of up to 1560 sq. ft.
- •Compatible with Alexa, allowing for voice control and smart home integration.
- •Features washable mesh pre-filters, reducing the need for frequent replacement.
- •Utilizes HEPA and activated carbon filters for effective air purification.
- •Smart mode and auto mode for efficient and adaptive operation.
- •Comes with a 5-year warranty for customer assurance.
- •Provides detailed air quality insights through the Coway IoCare app.
- •Quiet operation, even at medium speed (50 db).
Cons
- •Some users reported issues with the app and smart functionality.
- •Replacement filters are relatively expensive (~$120/year).
- •Requires strategic placement to cover larger areas effectively.
- •The unit is heavy (25 pounds), which might be cumbersome to move around.
- •Mixed reviews on the effectiveness of the air quality sensor.
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How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Mar 3, 2025.
Discussion
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