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Best Air Purifier for Dust Allergies – Coway Airmega 300S Air Purifier

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☑ Real-Time Monitoring of Air quality
☑ Mobile App control
☑ Wi-Fi Connection
☑ Smart mode
☑ Efficient and powerful dust eliminator
☑ 4 fan speeds

Last updated on May 21, 2020 4:37 pm
Best Air Purifier for Dust Allergies – Coway Airmega 300S Air Purifier
Best Air Purifier for Dust Allergies – Coway Airmega 300S Air Purifier

$749.00 $515.33

Score & Analysis

Features Score



Price Range : Greater Than $500

Group Rank : #2( out of 7 )


Average score in the group


Best score in the group



Overall Rank : #4( out of 85 Air purifier )


Average score in Air purifier


Best Score in Air purifier



Features Group This
Best Average Remarks Best Average Remarks
CADR (Clean air delivery rate) 210 150 below average
N/A 184.33 below average
CADR Dust 500 306.8 below average
300 164.7 Above average
CADR tobocco smoke 500 303.8 below average
270 163.45 Above average
CADR pollen 640 345 below average
330 176.64 Above average
Air changes per hour 5 4 below average
2 2.8 below average
Energy consumption [Watt] 56 71 Above average
57 65.6 below average
Room Size 1560 735.43 Above average
1256 332.98 Above average
Noise level [db]-Air purifier 40 48.4 Above average
43.2 41.09 Above average
Airpurifier weight [lb] 8.62 24.65 Above average
21.4 13.22 Above average
Warranty [Months] 60 54 Best
60 42 Above average


It does not matter if you are suffering from Asthma and Allergies or if you are 100 percent healthy, as long as you want to breathe fresh and clean air in your home, Coway Airmega 300S should be one of your first choices. This air purifier is worth every cent it costs to buy it.

It is an easy-to-use device and does not make noise that can disturb you from sleeping. It is capable of keeping any room you place it clean of dust and other airborne particles. It has a large coverage radius (about 1,256 Sq. ft.) and will purify a large living room perfectly. It works perfectly on low as well as high settings.

The air purifier comes with a lot of amazing features including a super-effective filtration system. It has an Auto Mode where the Airmega 300S with auto-regulate its performance based on the quality of air it detects. Let’s find out more of the amazing features below:

Features of Coway 300S Air Purifier :

Efficient All-in-one air filtration system

This is one of the strongest talking points of any Coway product. The bran puts a lot of emphasis on the effectiveness of their filters and how much they capture airborne particles.

The Coway Airmega 300S has a washable Pre-filter. The Powerful Pre- Filter primarily captures large air contaminants. Then there is the Max2 Filter which is a combination of True HEPA filter and Activated carbon filter. TheMax2 filter captures about 99.97% airborne pollutants and also removes about 99% organic compounds from the air.

4 Fan speed

Another impressive thing about the Coway Airmega 300S is the sound. Almost all the air purifiers manufactured by Coway can operate in silent. The Airmega 300S is not an exception and it can do this thanks to its small fans. This low noise, however, comes at the expense of fan power.

When the air purifier is on the lowest setting, its noise level is only about 22 decibels which are way better than a chunk of the popular air purifiers out there. When the fan is set to the highest speed, the noise level is about 52 decibels.

To make things even more interesting, the noise produced by the Airmega 300s is White Noise. If you are wondering why this is interesting, White Noise is scientifically proven to help people sleep faster and better!

Wi-Fi Connection

This dust eliminator also has Wi-Fi connectivity. There is an app that you can download on your smartphone that allows you to wirelessly control your air purifier. Even though the air purifier does not have a dedicated remote control, you can then use your smartphone as the remote control the air purifier never had. The Air purifier also has a touch control panel where you can see information about the Wi-Fi connection. Via the app, you can get real-time information about the quality of air if your home instantly.

Energy-star certified

The air purifier is energy-efficient and has an ECO Mode that automatically regulates how much power is consumed.

Best Air Purifier for Dust Allergies – Coway Airmega 300S Air Purifier Prices

Price History

Price history for AIRMEGA 300S The Smarter App Enabled Air Purifier (Covers 1256 sq. ft.),Compatible with Alexa
Latest updates:
  • $515.33 - March 2, 2020
  • $649.00 - February 18, 2020
  • $389.40 - January 20, 2020
  • $309.33 - December 21, 2019
  • $308.79 - December 18, 2019
  • $309.33 - November 27, 2019
Since: November 27, 2019
  • Highest Price: $649.00 - February 18, 2020
  • Lowest Price: $308.79 - December 18, 2019

Additional information

Specification: Best Air Purifier for Dust Allergies – Coway Airmega 300S Air Purifier



Mold spores



Bacteria and viruses

Chemical and gas fumes

Odros and smells

Pet dender

CADR rating

CADR (Clean air delivery rate)




CADR tobocco smoke


CADR pollen


Air changes per hour


Energy consumption [Watt]


Room Size


Noise level [db]-Air purifier


Filters & Sensors
Hepa fliter

True hepa Filter

Air quality sensors

Carbon filter

Filter replacement indicators


Washable pre filter

Other useful
Carrying handle


Digital control

Night light

Programmable timer

Technology-Air purifier
0.3µm particle removal (%)


Antimicrobial treatment

Ozone free

Photocatalytic oxidation

Plasma wave technology

Airpurifier Height [inch]


Airpurifier Length [inch]


Airpurifier weight [lb]


Airpurifier Width [inch]


Warranty [Months]


Wireless controls

Amazon Alexa-Air

Google Assistant-Air

App Control-Air

Remote Control-Air

Voice Control-Air


Will this air purifier cause noise pollution?

No, it won’t. The innovative engineering behind the design of the air purifier ensures that you can reduce the noise level based on your preference without affecting the performance of the device.

Will it remove airborne pollutants generated by pets?

The Coway Airmega 300s is not just a dust eliminator. It can also remove pet dander and pet hair as well as any other airborne pollutant you can find indoors.

How long will the filters last before I have to change them?

The filters in Coway Airmega 300S can last 12 months after which you have to change them.

Does it have Pre-filter? Is it washable and reusable?

Yes, it has a pre-filter which is washable and can be reused. However, it has to be replaced after 12 months

Any maintenance needed?

This purifier does not require a lot of maintenance practices. It has a washable Pre-filter. You can also wipe down the air purifier with a soft cloth.

Does the Pre-Filter have a lifespan?

Yes, it does. The Pre-Filter can last for about 12 months before it needs replacing

Where is the best spot to place this air purifier?

The air purifier can be placed anywhere that has unrestricted access to airflow in the room

What kind of impurity does it remove?

It captures all airborne pollutants and particles including fungus, pet hair, pollens, odor, allergens, bacteria, among others. It is a very good way to guard your home against respiratory diseases or illnesses.

Is the Coway Airmega 300S portable?

It is a lightweight air purifier and weighs about 21.4 lbs. This indicates that it can be moved from one room to another. It also has handles that make it easier to move it.

Does it have any special features?

It has a powerful carbon and HEPA filtration that ensures that the device removes 99.97% airborne pollutants and particles down to 0.3 microns. A pre-filter combines with the powerful filtration system to ensure maximum effectiveness.

Are there any specific groups that can use the Coway Airmega 300S purifier?

No, anyone that wants to maintain fresh and clean air in his or her home can use it. People who are allergy and asthma sufferers will enjoy it even more.

Is it energy efficient? And what is its power consumption?

The power consumption is not large at all. it consumes about 57 watts of electricity which will cost you around $21 every year if you operate the Coway Airmega 300S for 8 hours every day.

What is the coverage range of the Arimega 300S

It can cover about 1,256 sq. ft. This makes it ideal for large rooms in houses.

Can it be wirelessly controlled with a mobile App?

Yes, you can control the performance of the air purifier from your smartphone. The purifier also has a Wi-Fi connection which allows you to remotely adjust the performance of the purifier as you see fit.

How long is its warranty? (If any)

It has a warranty just like every other product produced by Coway Brand. The warranty for this product is 3 years.

What type of filter does the Airmega 300S use?

It uses a washable Pre-filter and a Max2 Filter (consisting of a Green True HEPA filter and an Activated Carbon filter).

What is the number of fan speed it has? Can I adjust the speed?

The Coway Airmega 300S has 4 adjustable fan speeds. Adjusting the fan speed will move you to another performance mode,

Should I be worried about Ozone emission from this device?

No! Airmega 300S is 100% Ozone emission-free. It is perfectly safe to use it in your house/home.

Is there any feature that automatically turns off the air purifier?

Yes, there is. When Coway Airmega 300S is in ECO Mode, it will automatically turn off if its sensors detect that the air quality remains good for 10 minutes. It would power up again if the air quality level drops.

Does the Coway Airmega 300S have a filter replacement indicator?

Yes, there is an on-board filter change indicator light that alerts you when you need to change the filter.

Can you control it with a Remote?

No, it does not have a remote control

What is the CADR score of the Airmega 300S?

The Airmega 300S has the following CADR values: 260 Pollen, 260 Dust, and 260 Smoke. It also has 340 CFM (Amount of Air moved).

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