I am Airmega 300S

I‘m the smart and dual powered Air Maker.

Explore Airmega 300S

Coway HyperCaptive™ Filtration

The combination of multiple filters removes up to 99.999% of nano-sized particles down to 0.01 µm, smaller than bacteria and virus.¹

Washable Pre-Filter

Extra fine Pre-Filter removes large dusts, fur, hair and pet hair.

Max2 Green™ Filter

The advanced combined filter of Activated Carbon and GreenHEPA™ technology applied Ultrafine Particle Filter for maximum performance on cleaning common household particles.

Max2 Green™ Filter

Secondary GreenHEPA™ technology applied filter to remove particles including allergens, bacteria, dander, fine dust, mould, pollen and virus.

Washable Pre-Filter

Secondary Pre-Filter removes large dusts, fur, hair and pet hair.


Maximum protection against common household particles


Human Hair

Pet Hair

Dust mites


Max2 Green™ Filter with Coway GreenHEPA™ Technology

Food Smell

Cigarette Smell

Pet Smell





Acetic Acid








Dust Mites






Max2 Green™ filter for maximum purification

  • Carbon + Ultrafine Particle
  • Micro Seal: No Air Leakage
  • 1 Time Filter Maintenance
  • Coway GreenHEPA™ Technology

Max2 Green™ Filter is an All-in-One filter combining Activated Carbon and Ultrafine Particle filters. Micro seal, crafted to perfection and combined with GreenHEPA™ tech to offer maximum performance and easy maintenance. 

GreenHEPA™ anti-virus technology for dual protection against virus and more.

Our filters are treated with a special anti-virus formula that is harmless to our bodies. It provides double protection that is laboratory tested. Captures 99.9% and neutralizes the possibly harmful particles from the air². Additional external test certifies the neutralization of human coronavirus (HCoV-OC43) in 2 hours³.

* Test result with SARS-CoV-2 to be ready for publication in December 2021


Dual air suction with ultra-powerful performance

The Dual Suction technology provides a higher air absorption, coming from both left and right sides. The 300S thrust clean air at a 575 m³/h CADR, covering small to extra-large spaces up to 149 m².


Refreshingly, the smartest Airmega yet

Fully controllable with mobile, smart mode adjusts fan speed and runs eco mode seamlessly with air quality monitoring.


  1. App-Controlled Timer

  2. Pre-Filter Cleaning / Main Filter Replacement Notification Light

  3. Air Quality Indicator

  4. Fan Speed / Mode control

  5. Smart Mode / Sleep Mode / 3 Manual Speeds/strong>

  • Good
  • Moderate
  • Unhealthy
  • Very unhealthy
  • 1

    App-Controlled Timer

  • App-Controlled Timer

  • 2

    Pre-Filter Cleaning / Main Filter Replacement Notification Light

  • Pre-Filter Cleaning / Main Filter Replacement Notification Light

  • 3

    Air Quality Indicator

  • Air Quality Indicator

  • 4

    Fan Speed / Mode control

  • Fan Speed / Mode control

  • 5

    Smart Mode / Sleep Mode / 3 Manual Speeds/strong>

  • Smart Mode / Sleep Mode / 3 Manual Speeds/strong>

  • 1

    App-Controlled Timer

  • App-Controlled Timer

  • 2

    Pre-Filter Cleaning / Main Filter Replacement Notification Light

  • Pre-Filter Cleaning / Main Filter Replacement Notification Light

  • 3

    Air Quality Indicator

  • Air Quality Indicator

  • 4

    Fan Speed / Mode control

  • Fan Speed / Mode control

  • 5

    Smart Mode / Sleep Mode / 3 Manual Speeds/strong>

  • Smart Mode / Sleep Mode / 3 Manual Speeds/strong>


My Smart Modes

Smart Mode adjusts fan speed and settings based on the surrounding air quality and environment.

Smart (Auto) Mode

Smart Mode changes the fan speed and turns on the Eco Mode based on real-time air quality. This improves the product efficiency and saves energy.

Smart (Eco) Mode

Eco Mode turns on automatically when the space remains clean for 10 minutes. The fan will be turned off to save energy and turn back on once the air quality goes bad.

Smart (Sleep) Mode

Sleep Mode can be turned on manually and when the room is clean for 3 minutes, the fan rotation will lower automatically to reduce noise and save energy.


Exceptional air purification with absolute quietness

The Quiet Mark by the UK Noise Abatement Society certifies that low noise is guaranteed for everyday life and also for special times.


Control every part of your 300S from app-solutely anywhere

Connect with Coway IoCare App to monitor and control everything freely.

Control All Features

Access everything wirelessly from power control to smart mode selection, timer and more.

Indoor Air Quality Report

Always be aware of your room’s air quality and keep track of when the air is good and bad.

Filter Notification

With filter status alerts, it is super easy to know when it’s time to clean or replace the filters

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Smart premium look

Seamlessly blending the luxury style with fresh air.



Frequently asked questions

Airmega 300S Manual
Download the manual here:

Airmega 300S Manual
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Airmega 300S Specifications

Room Coverage: 149 m2

CADR (Clean Air Delivery Rate): 575 m3/h

Filter: Pre-Filter + Max2 Green™ Filter

Filter Life Expectancy: Max2 Green™ Filter (1 year)

Air Quality Indicator: 4 Colours (Blue / Green / Yellow / Red)

Airflow Control: 5 Stages (Smart / Sleep / 1 / 2 / 3)

Timer: App-Controlled 1, 4, 8 hours

Minimum Noise: 22 dB

Maximum Noise: 52 dB

Power Consumption: Max 57 W

Product Dimension (H x W x D): 53.2 x 34.5 x 34.5 cm

Product Weight: 10 kg


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ECARF Seal of Quality

The ECARF Seal certifies products and services that have been fully adapted to the needs of allergy sufferer, making an allergic reaction very unlikely.

Quiet Mark Certification

Quiet Mark is a certification provided by the UK Noise Abatement Society and recognized internationally. The seal certifies consumer appliances with exceptional low noises that are ideal for everyday usage.

IDEA Award

Coway’s exquisite product design was awarded the most renowned International Design Excellence Award (IDEA). Coway was awarded for the highest standard for 12 consecutive years.

Any questions? Get in touch


¹ Coway air purifiers has been proven to trap dust, pollen, dander, viruses and bacteria in the air based on KCL(Korea Conformity Laboratories) testing. They have been tested in a 30㎥ size chamber according to the Korea Air Cleaning Association standard (SPS-KACA 002-132:2018 Modified)to measure the 0.01㎛ size of particle removal rate. It was tested on maximum fan speed in normal room temperature and humidity conditions. The performance may vary in the actual living environment of customers.

² 99.9% of viruses, bacteria, fungi and pollen were verified to be removed from the air by Coway air purifiers with GreenHEPA™ technology applied filters based on the Japan Food Research Laboratories(JFRL) testing according to JEM 1467 standard. Tested with AIRMEGA AP-1516D, AIRMEGA AP-1220B, AIRMEGA MIGHTY air purifiers and additionally AIRMEGA 150, AIRMEGA 250, AIRMEGA 300S, AIRMEGA 400S will acquire the test report in 1H, 2022.

All tested by JFRL and received above result within below time.

  • Virus: Tested with Escherichia coli phage ΦX174 NBRC 103405, 60 minutes
  • Bacteria: Tested with Staphylococcus epidermidis NBRC 12993, 60 minutes
  • Fungi/Mold: Tested with Penicillium citrinum NBRC 6352, 60 minutes
  • Pollen: Tested with Cedar Pollen extract, 30 minutes

Tested with Influenza A virus (H1N1) and Staphylococcus aureus on Coway’s Green HEPA filter media by Japan Food Research Laboratories (JFRL) and no growth was found on the material after 24 hours kept in room temperature.

Both tests were performed on small test pieces cut from the Green HEPA filter media, so this disclaimer can be used for any Coway products that use this filter.

  • Virus: Tested with Influenza A virus (H1N1), 3cm x 3cm autoclaved piece
  • Bacteria: Staphylococcus aureus, inoculated on 50mm x 50mm test piece.

³ Tested with Human Coronavirus (HCoV-OC43) on Coway GreenHEPA™ technology applied filter media by BioPS Co., Ltd, a research organization specializing in viral clearance studies in South Korea. The test method was a filter media coupon test to observe the neutralization effectiveness. After 2 hours kept in room temperature, there were above 99.999% removal rate of the virus after the virus made contact with the filter media resulting in neutralization or inactivation of the virus is valid. Same result shows after 12 hours and 24 hours. This specific test was conducted with Human Coronavirus (HCoV-OC43) as the experimental model virus (Not Covid-19 (SARS-CoV-2)) because OC-43 is one of the seven types of Coronavirus that can be infected to human.

Note: Air purifiers are known to be effective in preventing the Covid-19. However it should never be regarded as the primary method of the virus infection. Cleaning hands, trying to avoid contact and avoiding being in closed space in the public is necessary to minimize the possibility of being affected by the possible virus infection. Coway supports every patients and medical staff around the world who work tirelessly to prevent and cure the spread of hazardous virus.

* CADR (Clean Air Delivery Rate) of particulate matter is tested according to GB/T18801-2015 by a certified third-party lab.

Measurement specifications are defined in GB/T 18801-2015, according to which two particle concentration decay rates have to be determined within a test chamber with a defined volume (Vchamber): a natural decay rate with inactive air cleaner (knat) and a decay rate detected under the measurements are carried out in a 30 ㎥chamber, which is empty except for the air cleaner placed on a table, two fans to mix and recirculate the air and some measurement periphery (mainly tubing). The chamber is kept at a temperature of 25 ± 2°C and a relative humidity of 50 ± 10%. Cigarette smoke is used as test aerosol and the number concentration of particles > 0.3 µm is measured using an optical aerosol spectrometer usage of the indoor air cleaner (kAC). The decay rates k are determined from the measured temporal decay of the particle concentration C(t), starting from the initial concentration C0:

* Room size is calculated according to NRCC-54013 standard using CADR tested according to GB/T18801-2015.

  • NRCC : Method for Testing Air Cleaners
  • Formula for room size : Room size = 0.26*CADR

Note: The performance results may vary depending on the actual use environment of customers.