Airmega 400S Specification
14.8 x 22.8 x 14.8 in
(37.6 x 57.9 x 37.6 cm)
|Weight||24.7 lb (11.2 kg)|
|Coverage (up to)||1560 sq. ft. (145 m2)|
|Dust free (CADR)||350 cfm (595 m3/h)|
|Pollen free (CADR)||350 cfm (595 m3/h)|
|Smoke free (CADR)||350 cfm (595 m3/h)|
- Replacement cost ($)
Pre-filter (2 pack)
- Replacement cost ($)
Max2 (Green True HEPA filter)
- Replacement cost ($)
Max2 (Activated carbon filter)
- Replacement cost ($)
|Noise level||22 - 52 dB|
|Power consumption||6 - 66 W|
|Timer/ Scheduler||1, 2, 4, 8 hours (App), Scheduler|
|Sensors||Pollution sensor, Light sensor|
|More color options|
|Air qualityAQ indicator|
|Filter change indicator|
|Email/ Phone support|
Airmega 400S key features
- Wi-Fi connectivity for AIRMEGA app integration
- Works with Amazon Alexa
- 4-stage filtration
- Permanent Pre-filter
- MAX2 filter (True HEPA filter + Activated Carbon filter)
- 3 fanspeed (Low, Medium, High)
- Dual air suction via side air inlet
- Dedicated Pre-filter and HEPA filter indicator (Change, Wash)
- Smart mode - Auto, ECO and Sleep mode
- Real-time air quality monitor (Good, Moderate, Unhealthy, Very Unhealthy)
- Adjustable pollution sensor's sensitivity (sensitive, normal, less sensitive)
- Scheduler/ Timer via IoCare app (1, 2, 4, 8 hours)
- 5 years warranty
Airmega 400S review
- 4-stage filtration with widest purifying coverage in its group.
- Dual pre-filter that cover and protect the HEPA filter from large particles flowing through both sides of the air inlet.
- Outstanding allergens and smoke filtration via its MAX2 (Full-size HEPA filter + Carbon filter).
- Auto mode that accurately and automatically adjusts the fan speed based on room air quality.
- Light/ sleep mode that automatically tones down the fan speed when the room is dark.
- Separate Pre-filter and MAX2 filter lifespan indicator that calculates filter life based on real-time usage/ environment.
- Timer + advanced scheduler for 7 days customizable on and off setting (via IoCare app).
- Highly legible and accurate real-time air quality monitor.
- Standard 5 years manufacturer warranty.
- All Airmega air purifiers are expensive. This is the most expensive version of its series.
- Filter replacement cost is high although Max2 set consists of both HEPA and Carbon filter.
- At the point of this review, IoCare App is less refined and intuitive compared with competitors app.
- Slight learning curve on Wi-Fi connectivity especially for first time user.
- No Ionizer as an option.
- Timer is only accessible via Airmega app.
Simplicity meets modern architecture. Coway Airmega 400S manage to perfect the art of design VS practicality with its seamless dual side air inlet. Sharing the same dimension as 400, the 14.8 x 22.8 x 14.8 in size and 24.7 lb weight is considerably compact for its category if you discounted the four fixed legs. Build quality is top-notch that does not seem to be any signs of ozone off-gassing or air by-pass. Upfront the air cleaner comes with standard LED ring air quality indicator that shows real-time (every minute) indoor air pollution. Up to four different colors will be shown to indicate the current air quality status ranging from Good (Blue and green), Moderate (Green and yellow), Unhealthy (Yellow and pink) to Very Unhealthy (Pink and red). Finally, to lift or transport the air purifier around, simply hold on to both sides of the handles.
Airmega 400S controls are located at the top black panel that separates into two sections. On the left side, you will find a Wi-Fi button, Light button, Pre Wash button and Max2 change button plus a round light sensor. Touching the Wi-Fi button connect the air purifier to a Wi-Fi network. The Wi-Fi LED indicator will start blinking when the pairing is in progress and stays constant once a stable connection is established. The light button will either turn on or off the air quality indicator light. Pre Wash button will shows the pre-filter cleaning cycle at 5 levels: 100%, 80%, 60%, 49%, 20%, and 0%. Once the button is lit, you will need to clean the pre-filter. To reset the Pre Wash filter Lifetime notifications, touch and hold the button for 2-3 seconds until the button light is off. The above steps apply to Max2 Change button, but instead of cleaning the filter, you will need to replace the Max2 filter. Light sensor function by detecting the intensity of its surrounding light. When the air purifier is in Smart mode and everything is in pitch black for 3 minutes, Sleep mode will be activated automatically. Moving to the right side, you have a big main Power button that is self-explanatory. Touch the button once to turn on the air purifier, touch and hold the same button again for 2-3 seconds will turn it off. To manage the fan speed or purifying mode, either touch the air speed or Sleep mode on the curve bar, or swipe your finger upward or downward to select the desired speed/ mode. One more secret function that most people didn’t know unless they read the manual (how many of you does that), you can adjust the pollution sensor’s sensitivity by holding on the Light button +Smart bar. Continue by selecting one of the air speed ( speed 1 = sensitive, speed 2 = normal, speed 3 = less sensitive). Overall, all buttons are responsive, clearly labeled with dedicated indicator light, and an unseen, intuitive swiping speed control.
Like 300S, the Wi-Fi enabled feature that allows you to control the air purifier at any place via Coway IoCare app. Pairing is easy for both Apple and most Android phones so long you have strong Wi-Fi connectivity. We did encounter some issues with some lower end model (Huawei to be exact but that is few off case scenario) that requires multiple retries. Once successfully connected the air purifier to Wi-Fi network, you can access to features such as Smart Monitoring, Real-time Air Monitoring, Indoor Air Quality Report (including records from past week), Outdoor Air Quality Monitoring (check air quality in your city), Scheduler/ Timer, Speed and Smart Mode Control (Auto/ Sleep mode). Other than popular timer/ speed control, the highlights would definitely be the scheduler that allows you to program a weekly schedule when to turn on or off the machine. Airmega 400S also works with Amazon Alexa where you could manage the air purifier via the given list of command. The standard list of voice command includes turning on or off, switching to Smart or Sleep mode, changing the fan speed, set timer, filter life status and check air quality.
Briefly go through other key specification again: A standard 4-stage filtration, 3 fan speed with Smart mode (Auto/ Sleep/ Eco), Pre-filter/ MAX2 life-time indicator (actual filter real-time usage lifespan), Wi-Fi enabled for Airmega’s IoCare app and Amazon Alexa support (more on this later), timer/ scheduler (via app), air quality indicator, 30 days money back guarantee and 5 years warranty.
Airflow, speed, and CADR
What’s inside count
^ Airmega 400S filters/ technologies/ lifespanAirmega 400S uses the same 4-stage filtration setup that is proven against the test of time. Essentially a dual pre-filter plus Max2 filter bundled (Green True HEPA filter and Activated Carbon filter), each pre-filter would be placed at both sides of air inlet to clear out any large incoming airborne contaminants before reaching to the Max2 filters. With large particles out of the way, Green True HEPA filter and Activated Carbon filter in Max2 would have the full capacity (99.7% for HEPA and 99% for carbon) in capturing tiny microorganisms, gases and odors. There is no optional Ionizer included in the filtration list; Not a big miss for some.
Hair/ Pet hair
Keep it down
At what cost
^ Replacement filters/ estimated cost
Airmega 400S VS the challengers
Airmega 400Identical in every way except it's around $100 cheaper due to the lack of Wi-Fi + Alexa support. Airmega 400 is the air purifier to go for if you have no use of the remote access.
Airmega 300SThe smaller, cheaper, and Wi-Fi ready version that is almost indistinguishable at first glance, Airmega 300S has a weaker overall performance and lacks filter real-time usage indicator.
Coway AP-1512HH MightyCoway best-selling air purifier that is priced a lot less yet with decent airflow circulation, Coway Mighty filtration performance is nevertheless incomparable to Airmega 400S.
Rabbit Air MinusA2 SPA-780NGain a brilliant 6-stage filtration, ionizer, and a body that is mountable to wall, Rabbit Air MinusA2 SPA-780N purifying coverage and airflow delivery rate is no match for Airmega 400 output.
Good to know
Airmega 400S VS 400
400 is the cheaper version to 400S with identical purifying coverage, airflow delivery rate, and CADR. Features wise, it has a built-in timer on the control panel to replace the lack of Wi-Fi support. Airmega 400S Smart air purifier is exactly as the "S" variant implies, a higher spec version with added Wi-fi enabled features. You can remotely access 400S features via ioCare app or using Amazon Alexa voice command.