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AIRMEGA 400 vs AIRMEGA 400S: Smart Air Purifier Comparison

Air quality is too often overlooked. With that said, there are a variety of allergens, bacteria, and other pollutants that can contaminate the air you breathe.

To ensure the air in your home is safe for you and your loved ones to breathe, an air purifier is an easy to use device that can monitor the air quality and remove unwanted particles from your air, resulting in a cleaner and healthier living space.

AIRMEGA 400 vs AIRMEGA 400S
Airmega 400

Airmega devices are highly advanced air purifiers developed by Coway, a brand that is well known for creating health-minded products that are on the cutting edge of technology. The Airmega 400 and Airmega 400S are similar devices, making it difficult to discern their true differences. We’ll compare them in several categories to examine their differences and determine which is the superior model overall.


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Coverage & Capability

Each of these devices was designed to purify large areas. Both the Airmega 400 and Airmega 400S were designed to purify the air and cover an area of up to 1,560 square feet. This makes them perfectly appropriate for various rooms or spaces within your home.

The presence of an air quality sensor also allows you to monitor your home’s air quality in real time. A bright, attractive LED ring on the exterior of the device indicates whether the present air quality is satisfactory or not.

When it comes to capability, each of these models prove to be identical. They are designed to cover the same area and feature an LED light that reveals the quality of your air in real time. When it comes to their overall performance, each of these models are identical.

AIRMEGA 400S vs AIRMEGA 400
Airmega 400S

Smart Features

These advanced devices are intelligently designed to make breathing easier than ever. Both the Airmega 400 and Airmega 400S have three convenient modes. An Auto-Speed mode intuitively adjusts the amount of air filtration needed based on the room’s current air quality.

An Eco Mode conserves energy by automatically shutting off the fan when a room’s air quality has been satisfactory for 10-minutes and allows it to restart automatically as needed. A convenient Sleep Mode uses a light sensor to detect when the room is dark and adjusts fan speeds accordingly. The Sleep Mode is a manual feature on the Airmega 400 but is an automatic feature on the Airmega 400S.

The Airmega 400S really shines when it comes to connectivity. Thanks to a convenient mobile app that is compatible with both IOS and Android systems, you have the ability to see how your air purifier is functioning even when you are not home.

You can not only check the air quality but also check the status of your filters, set a timer, and receive air quality updates when you are away from home. All that is required is a Wi-Fi router frequency band of 2.4GHz.

While both of these are intelligent devices, it’s clear that the Airmega 400S excels in this area. It not only features the same versatile modes as the Airmega 400 but it also wirelessly connects to your phone or tablet so you can stay up to date about the air quality within your home even when you are on the go. When it comes to this category, the Airmega 400S proves to be superior.

AIRMEGA 400 Review
Airmega 400

Extra Features

Each of these air purifiers has extra features that allow you to customize your user experience. They both feature a 4-level pollution indicator that accurately monitors your air quality. In addition, they both feature multiple fan speeds. Present on both devices is a Sleep Mode, as well as a Low, Medium, and High fan speed for advanced customization.

These devices also both have timers that allow the user to control the device’s runtime. The Airmega 400 features a 1, 4, and 8-hour timer, while the Airmega 400S has 1, 2, 4, and 8-hour intervals, allowing for even more customization. The Airmega 400S also includes multiple ways to schedule your timer, including virtually through the included app.

While both of these devices do include advanced features such as multiple fan settings, once again the Airmega 400S proves to be the superior model. A more convenient and highly customizable timer ensures this air purifier always runs to your specifications.

AIRMEGA 400S Review
Airmega 400S

Filtration System

Both of these devices are able to purify air thanks to an advanced air filtration system. Both the Airmega 400 and Airmega 400S include a dual filter set.

The Green True HEPA filter removes an impressive 99.7% of allergens, mold, dust, and other particles from the air, while an Activated Carbon filter removes 99% of VOCs and unwanted odors. The convenient pollution indicator also gives insight into how clean your air is in real-time.

In addition to an advanced filtration system, convenient indicator light lets you know when it is time to change the unit’s filter. By gauging a filter’s lifespan by usage rather than time, you get the most use out of every filter that you purchase. This ensures your unit always runs at an optimal level.

Based on the filtration system alone, the Airmega 400 and Airmega 400S prove to be identical. They each have a dual filtration system that effectively cleans the air, as well as an indicator light that lets you know when a filter’s effectiveness has expired.

AIRMEGA 400 Air Purifier

AIRMEGA 300 vs 300S vs 400 vs 400S: Air Purifier Comparison


AIRMEGA vs AIRMEGA 400S: Conclusion

Upon comparison, it’s clear that the Airmega systems by Coway are highly effective and are great options if you are looking for a device that will effectively rid your air of pollution. Despite being slightly more expensive, the Airmega 400S is far superior than the Airmega 400. While many of their features are the same, the ability to wirelessly connect to a tablet or smartphone makes the Airmega 400S a more intuitive device, making it our pick for the best Coway air purification system.

AIRMEGA 400S Air Purifier


Air Recommended Air Purifiers

Our Pick Perfect for bedrooms, playrooms, and living rooms, the Coway Airmega AP-1512HH is one of the best-performing, most durable, and most economical purifiers we’ve tested.

Most Popular The Levoit Core 300 air purifier has some strong suits, but in our opinion it falls short of carving out a meaningful niche for itself. Its ideal use would be in a small bedroom occupied by someone who is sensitive to noise.

Also Great With high end air cleaning performance and a whisper quiet fan, the Winix 5500-2 is the perfect combination of power and finesse. It cleared airborne particulates out of our smokey testing room faster than any other model.

Best of the Best If you have a large space you want to remove irritants from, We recommend the Airmega 400S. All of Coway air purifiers do an excellent job of attacking indoor pollutants, and we highly recommend any of them. The 400S is designed to accommodate large room sizes.

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About the author

Hi I’m Alex, founder of HouseholdMe.com and I’d like to say thank you for dropping by. Like most of you, the first thing I look at before buying something online is reviews or buying guides. By reading what other people say will help me gauge whether or not a product is good or not.  I am trying to help people find answers, solve problems, and get inspired.

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