ReviewFinder Air Purifiers

Coway Airmega 400

TLDR: The Coway Airmega 400 is a highly effective air purifier with powerful filtration, large coverage area, quiet operation, air quality monitoring, and energy-saving features, making it a versatile and reliable choice for improving indoor air quality.
Ranking:  
Consumer sentiment:
In comparison:
Coway Airmega 400 rank #16 out of 61. Very high levels of customer satisfaction.
Go to rankings
9.4
Amazing

The product receives amazing reviews on average (consumer score 9.4). This is slightly above the median air purifier score of 9.1.

About consumer score

Price:
The lowest price we found for Coway Airmega 400 is $443.38, available here. This is above the median air purifier price of $219.95.
  • Lowest price: $39.14
  • Median price: $219.95
  • Highest price: $899
  • Coway Airmega 400 price: $443.38
Shop now
Expand
ReviewFinder: reviews, prices and alternatives summarized by a powerful AI engine.

Expert consensus

The Coway Airmega 400 is a highly effective air purifier with powerful filtration, large coverage area, quiet operation, air quality monitoring, and energy-saving features, making it a versatile and reliable choice for improving indoor air quality.

The Coway Airmega 400 is a highly effective air purifier that offers powerful filtration for improving indoor air quality. It features a True HEPA filter that can capture 99.97% of airborne particles, making it suitable for individuals with allergies, asthma, or pets.

It also includes an activated carbon filter to remove odors and reduce VOCs and fumes. The Airmega 400 is particularly beneficial for those living in areas with high air pollution or wanting to improve overall air quality in their homes.

The Airmega 400 is specifically designed for large rooms, with a coverage area of up to 1,560 square feet. It offers adjustable fan speeds and settings, including a Smart mode that automatically adjusts based on air quality. Despite its powerful fan, the Airmega 400 operates quietly, making it suitable for use in bedrooms.

Its noise level has been compared to that of the Ultra-quiet Rabbit Air MinusA2, despite having higher fan power.

The Airmega 400 features a built-in air quality sensor that provides real-time updates on air cleanliness through a LED ring. It also comes with a smartphone app that allows users to control the air purifier remotely, monitor air quality, and set schedules. This makes it convenient for users who want to easily monitor and improve air quality in their homes.

In terms of energy efficiency, the Airmega 400 is considered to be energy-saving. It has an energy-saving mode that shuts down the fan when air quality remains good for a certain period of time, reducing power consumption and saving on electricity bills. With a power consumption of 64 watts, it is relatively low for its large coverage area.

Overall, the Coway Airmega 400 is highly recommended for individuals with allergies, asthma, or pets, as well as those living in areas with high air pollution. Its powerful filtration, large coverage area, quiet operation, air quality monitoring, and energy efficiency make it a versatile and reliable choice for improving indoor air quality.

Filtration

The Coway Airmega 400 is a highly effective air purifier that uses a combination of filtration systems to remove pollutants and allergens from the air, making it suitable for individuals with allergies, asthma, or pets, as well as those living in areas with high air pollution.

The Coway Airmega 400 is a highly effective air purifier that uses a combination of filtration systems to remove pollutants and allergens from the air. It features a True HEPA filter that can capture 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, pet dander, and mold spores.

The Airmega 400 also includes an activated carbon filter to remove odors and reduce volatile organic compounds (VOCs) and fumes. It has a washable pre-filter to catch larger dust particles.

The Airmega 400 is particularly suitable for individuals with allergies or asthma, as it can effectively remove common allergens from the air. It is also beneficial for pet owners, as it can help eliminate pet dander and odors. Additionally, it is useful for individuals living in areas with high levels of air pollution or those who want to improve the overall air quality in their homes.

The filters in the Airmega 400 do require regular replacement. The washable pre-filter should be cleaned every two weeks, while the main Max2 filters typically last for around 12 months, depending on usage. The cost of replacing the Max2 filters is $129 for a set of two when purchased from the Coway website.

Knockoff brands of filters are available at a lower price, but caution is advised when considering them.

Overall, the Coway Airmega 400 is a powerful air purifier that offers effective filtration for improving indoor air quality. It is suitable for individuals with allergies, asthma, or pets, as well as those living in areas with high air pollution. Regular filter replacement is necessary, but the cost may vary depending on the specific filter and retailer.

What type of filtration system (HEPA filter, ionization, UV, etc.) does the Coway Airmega 400 use?

The Coway Airmega 400 uses a combination of filtration systems. It uses a True HEPA filter to remove 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, pet dander, and mold spores. Additionally, it has an activated carbon filter to remove odors and reduce volatile organic compounds. According to reviews, the Airmega 400 does not have an ionizer or UV filtration.
Based on 9 quotes from 9 sources [show quotes and sources]

If the Coway Airmega 400uses filters, what filter types does it use?

The Coway Airmega 400 uses a combination of filters. According to the product reviews in our database, it uses a washable pre-filter and the Max2 Filter Set, which is a combination of activated carbon and green True HEPA filters. The Max2 filter is responsible for the main cleaning work of the Airmega 400 and is capable of capturing up to 99.97% of particles in the air as small as 0.3 microns.
Based on 6 quotes from 6 sources [show quotes and sources]

How effective is the filter in the Coway Airmega 400 at removing pollutants and allergens?

The Coway Airmega 400 is highly effective at removing pollutants and allergens from the air. According to product experts, it uses a True HEPA filter that can remove 99.97% of airborne particles as small as 0.3 microns. This includes dust, pollen, pet dander, mold spores, and other allergens. The Airmega 400 also features an activated carbon filter that helps to remove odors and reduce volatile organic compounds (VOCs) and fumes. Additionally, it includes a washable and permanent pre-filter to catch larger dust particles. Overall, the combination of these filters makes the Coway Airmega 400 a powerful air purifier for improving indoor air quality.
Based on 5 quotes from 5 sources [show quotes and sources]

Do the filters in the Coway Airmega 400 require regular replacement? If so, how often?

Yes, the filters in the Coway Airmega 400 do require regular replacement. According to various product reviews, the pre-filters, which are washable, should be cleaned every two weeks to remove debris. The main filters, known as Max2 filters, typically last for around 12 months, depending on usage. The exact time may vary based on how much the filters are used. You can expect to replace the Max2 filters once a year. The cost of a set of two Max2 filters is $129, according to a review on The Gadgeteer. However, it's worth noting that there are knockoff brands available at a lower price, but it's recommended to proceed with caution when considering them.
Based on 7 quotes from 6 sources [show quotes and sources]

How much does it cost to replace the filter in the Coway Airmega 400?

The cost of replacing the filter in the Coway Airmega 400 depends on the specific filter and where you purchase it from. According to the verified product experts, a set of two Max2 filters for the Airmega 400 costs $129 when purchased from the Coway website. Please note that this price is subject to change and may vary depending on the retailer. Additionally, knockoff brands of filters can be found for as low as $45 for two pairs, but it is important to consider the potential risks associated with using non-genuine filters.
Based on 5 quotes from 5 sources [show quotes and sources]

Room Size

The Coway Airmega 400 is a powerful and quiet air purifier designed for large rooms, offering effective air cleaning and adjustable fan speeds.

The Coway Airmega 400 is a powerful air purifier that is specifically designed for large rooms. It is capable of effectively cleaning spaces up to 1,560 square feet, making it suitable for larger-than-average rooms. The Airmega 400 features a HyperCaptive Filtration System that can reduce 99.999% of 0.01-micron particles in the air, including pollen, pollutants, and allergens.

This makes it an ideal choice for those who suffer from allergies or respiratory issues.

The Airmega 400 also offers adjustable fan speeds and settings that can be optimized for different room sizes. It features five fan modes, including Smart, Sleep, Low, Medium, and High, allowing users to choose the speed that suits their needs. The fan speed automatically adjusts based on the room's air quality and lighting conditions, ensuring optimal air purification performance.

One standout feature of the Coway Airmega 400 is its quiet operation. Experts have praised its noise level, describing it as nearly silent, whisper level, or as quiet as rustling leaves. Even at the highest fan speed, the Airmega 400 only produces white noise, which can be suitable for a bedroom setting.

Some reviewers have compared its noise level to that of the Ultra-quiet Rabbit Air MinusA2, despite having higher fan power.

Overall, the Coway Airmega 400 is a highly recommended air purifier for large rooms. Its ability to effectively clean the air in spaces up to 1,560 square feet, adjustable fan speeds, and quiet operation make it a versatile and reliable choice for improving indoor air quality.

What is the maximum room size that the Coway Airmega 400 can effectively clean?

The Coway Airmega 400 is designed to clean spaces up to 1,560 square feet. According to multiple product reviews, this air purifier is specifically intended for large rooms and can effectively clean the air in rooms of that size. The Airmega 400 is equipped with a HyperCaptive Filtration System, which includes a washable pre-filter, activated carbon filter, and Green True HEPA Filter. This filtration system is capable of reducing 99.999% of 0.01-micron particles in the air, including pollen, pollutants, and other allergens. The Airmega 400 is a powerful air purifier that can cover a significant area, making it suitable for larger-than-average rooms.
Based on 12 quotes from 10 sources [show quotes and sources]

Does the Coway Airmega 400 have adjustable fan speeds or settings that can be optimized for different room sizes?

Yes, the Coway Airmega 400 does have adjustable fan speeds and settings that can be optimized for different room sizes. It features five fan modes: Smart, Sleep, Low, Medium, and High, allowing you to choose the speed that suits your needs. According to the product reviews, the fan speed automatically adjusts based on the room's air quality and lighting conditions to improve air quality. This means that the Airmega 400 is able to adapt to its surroundings and provide the optimal air purification performance for different room sizes and air conditions.
Based on 6 quotes from 4 sources [show quotes and sources]

What do experts say about the noise level of Coway Airmega 400?

According to experts, the Coway Airmega 400 is praised for its quiet operation. Reviewers have described the noise level of the Coway Airmega 400 as nearly silent, whisper level, or as quiet as rustling leaves. The noise level ranges from 22 decibels at the lowest fan speed to a maximum of 52 decibels at the highest fan setting. It is worth noting that even at the highest fan speed, the Airmega 400 only produces white noise, which can be suitable for a bedroom setting. Some reviewers have compared the noise level of the Coway Airmega 400 to be as quiet as the Ultra-quiet Rabbit Air MinusA2, despite having higher fan power. Overall, experts agree that the Coway Airmega 400 is impressively quiet considering its fan power and the amount of air it moves.
Based on 7 quotes from 6 sources [show quotes and sources]

Air Quality Sensors

The Coway Airmega 400 is an air purifier with a built-in air quality sensor and a smartphone app that allows users to monitor and control the device remotely.

The Coway Airmega 400 is an air purifier that features a built-in air quality sensor. According to expert reviews, this sensor uses a feedback method to communicate the indoor air quality in real-time. It utilizes a brightly colored LED ring on the front of the unit to provide visual updates on the cleanliness of the air every minute of the day.

This allows users to easily monitor and assess the air quality in their homes.

In addition to the built-in air quality sensor, the Coway Airmega 400 also comes with a smartphone app called IoCare Mobile App. This app allows users to control the air purifier through their mobile devices or tablets. It provides features such as monitoring indoor and outdoor air quality, temperature, humidity, and more.

Users can also receive real-time air quality notifications, monitor filter lifetime, and set schedules for the air purifier through the app.

Based on these expert reviews, the Coway Airmega 400 is a comprehensive air purifier that offers both real-time air quality monitoring through its built-in sensor and convenient control through its smartphone app. This makes it suitable for users who want to easily monitor and improve the air quality in their homes, as well as have the flexibility to control the air purifier remotely.

Does the Coway Airmega 400 have a built-in air quality sensor?

Yes, the Coway Airmega 400 has a built-in air quality sensor. According to product reviews on airpurifierfirst.com and The Gadgeteer, the air purifier uses air quality sensors to monitor the indoor air quality in real-time. The brightly colored LED ring on the front of the unit provides updates on the cleanliness of the air every minute of the day. This feature allows users to easily monitor and assess the air quality in their homes.
Based on 9 quotes from 7 sources [show quotes and sources]

What feedback method is used by the air quality sensor in the Coway Airmega 400?

The air quality sensor in the Coway Airmega 400 uses a feedback method to communicate indoor air quality in real-time. According to product experts on airpurifierfirst.com and The Gadgeteer, the sensor utilizes a brightly colored LED ring to provide visual feedback on how clean or dirty the indoor air is every minute of the day. This allows users to easily monitor the air quality and make necessary adjustments to the air purifier settings.
Based on 3 quotes from 2 sources [show quotes and sources]

Does the Coway Airmega 400 feature a smartphone app?

Yes, the Coway Airmega 400 features a smartphone app. According to multiple product reviews in the ReviewFinder database, the Coway Airmega 400 comes with a smart app called IoCare Mobile App. This app allows you to control the air purifier through your mobile device or tablet. You can use the app to monitor indoor and outdoor air quality, temperature, humidity, and more. Additionally, the app enables you to receive real-time air quality notifications, monitor filter lifetime, and set schedules for the air purifier. The app is available for both iOS and Android devices.
Based on 11 quotes from 6 sources [show quotes and sources]

Energy Efficiency

The Coway Airmega 400 is highly regarded for its energy efficiency and ability to clean the air in larger spaces.

Based on expert reviews, the Coway Airmega 400 is considered to be energy efficient. It features an energy-saving mode that conserves power by shutting down the fan when the air quality remains good for a certain period of time. This helps to reduce power consumption during periods of low pollution levels, ultimately saving on electricity bills.

The Airmega 400 has a power consumption of 64 watts, which is relatively low considering its large coverage area of 1560 square feet. This makes it an ideal choice for larger spaces such as living rooms, offices, or even small apartments.

Does the Coway Airmega 400 have an energy-saving mode?

Yes, the Coway Airmega 400 does have an energy-saving mode. According to reviews from verified product experts on ReviewFinder, the Airmega 400 has an eco feature where, if the air quality remains at a good level for a certain period of time (around 10 minutes), it will conserve energy by shutting down the fan. When it detects air pollution in the air, it will automatically restart. This feature helps to save on electricity bills by reducing power consumption during periods of low pollution levels.
Based on 5 quotes from 4 sources [show quotes and sources]

What is the energy consumption (in watts) of the Coway Airmega 400?

The Coway Airmega 400 has a power consumption of 64 watts according to reviews on Gadget Review and Breathe Quality. This makes it quite energy efficient, especially considering its large coverage area of 1560 square feet. In comparison, some light bulbs actually use more power than the Airmega 400.
Based on 3 quotes from 2 sources [show quotes and sources]

Expert Reviews

There are people on the Internet whose job is to review products. Below are their opinions.

ReviewFinder database has 21 expert reviews of Coway Airmega 400.

Expert reviews [21]

88
Total expert reviews: 21
  • with a score: 7
  • without a score: 14
Highest score by Cleanup Expert
99
Average score based on 21 reviews
88
Lowest score by At Home Divas
70

Score distribution:

80-100
60-80
40-60
20-40
0-20

Best Alternatives

3 best air purifiers in the same price range as Coway Airmega 400

Scroll to see all options. Click on the air purifier for more details.
Blueair Blue Pure 121 Blueair Blue Pure 211 Plus Auto Dyson Pure Cool Link TP02
Reviews
In comparison:
Blueair Blue Pure 121 rank #19 out of 98. Very high levels of customer satisfaction.
Go to rankings
9.6
Amazing
Reviews
In comparison:
Blueair Blue Pure 211 Plus Auto rank #30 out of 98. Very high levels of customer satisfaction.
Go to rankings
9.1
Great
Reviews
In comparison:
Dyson Pure Cool Link TP02 rank #44 out of 98. Very high levels of customer satisfaction.
Go to rankings
8.7
Great
Price
More product details More product details More product details
Air Purifiers above are offered because they are in the same price range as Coway Airmega 400. To browse more budget and premium air purifiers go to our air purifier ranking .

Position in ranking

We maintain a monthly ranking that sums up expert recommendations for all air purifiers.

Rank Change Price Air Purifier
The Spruce Pets
NBC News
Popular Mechanics
Business Insider
Forbes
This Old House
Wirecutter
WIRED
Tom's Guide
CNET
1
- $179
Coway AP-1512HH
The Coway AP-1512HH air purifier is highly praised for its comprehensive filtration system, effectiveness at removing pollutants, adjustable fan speeds, built-in air quality sensor, smartphone app connectivity, and energy efficiency.
-
-
1
-
6
-
1
-
4
-
2
- Check price
Winix 5500-2
The Winix 5500-2 air purifier is highly praised for its effective four-stage filtration system, quiet operation, built-in air quality sensor, and energy efficiency, making it a recommended choice for improving air quality in medium to large-sized rooms.
1
-
10
-
-
-
3
-
5
-
3
- Check price
Honeywell HPA300
The Honeywell HPA300 True HEPA Air Purifier is a highly praised and efficient option for improving air quality in larger rooms, particularly for individuals with allergies or asthma.
-
4
-
1
-
-
-
-
2
-
4
- $197
Coway Airmega 200M
The Coway Airmega 200M is a highly effective air purifier with a 4-stage filtration system that removes pollutants and allergens, making it suitable for pet owners, kitchens, and individuals with allergies or respiratory conditions, while also offering energy-saving features.
-
-
-
-
-
-
2
1
-
-
Show all rows
For Really Big Spaces
8 Jun 2023 (9 months ago)
Read article
Best For Large Rooms
22 Jan 2024 (2 months ago)
Read article
Best for Very Big Rooms
26 Oct 2023 (5 months ago)
Read article

Highest recommended air purifiers this month

ReviewFinder ranks based on a combination of customer reviews, expert reviews / mentions and popularity. Expert recommendations carry the highest weight in the ranking. We do not rank based on price, our commission or brand. air purifiers below are at the top of our ranking this March.

Scroll to see all options. Click on the air purifier for more details.
Coway AP-1512HH Winix 5500-2 Honeywell HPA300 Coway Airmega 200M
Reviews
In comparison:
Coway AP-1512HH rank #1 out of 98. Very high levels of customer satisfaction.
Go to rankings
9.6
Amazing
Reviews
We don't yet have enough review information for Winix 5500-2
Reviews
In comparison:
Honeywell HPA300 rank #3 out of 98. Very high levels of customer satisfaction.
Go to rankings
9.4
Amazing
Reviews
In comparison:
Coway Airmega 200M rank #4 out of 98.
Go to rankings
7.7
Good
Price
The Coway AP-1512HH air purifier is highly praised for its comprehensive filtration system, effectiveness at removing pollutants, adjustable fan speeds, built-in air quality sensor, smartphone app connectivity, and energy efficiency. The Winix 5500-2 air purifier is highly praised for its effective four-stage filtration system, quiet operation, built-in air quality sensor, and energy efficiency, making it a recommended choice for improving air quality in medium to large-sized rooms. The Honeywell HPA300 True HEPA Air Purifier is a highly praised and efficient option for improving air quality in larger rooms, particularly for individuals with allergies or asthma. The Coway Airmega 200M is a highly effective air purifier with a 4-stage filtration system that removes pollutants and allergens, making it suitable for pet owners, kitchens, and individuals with allergies or respiratory conditions, while also offering energy-saving features.
More product details More product details More product details More product details
ReviewFinder: reviews, prices and alternatives summarized by a powerful AI engine.