Airmega 400S

Airmega 400S Review

Dig Airmega looks and have all the money in the world? Airmega 400S would be the best choice.  Comes with all Airmega purifying functions plus Wi-Fi connectivity, no surprise Airmega 400S is what money can get you;  a modern air purifier that provides top rated features and performance. Similar with other Airmega air purifiers in terms of design and functionality, so what components would make Airmega 400S stand out than the rest? Head over to our complete review about the air purifier and its features below.
± 849 p
     Annual filter ^    
± 130 p
Online price*
Latest Amazon price

Airmega 400S Specification

ProductAirmega 400S
14.8 x 22.8 x 14.8 in
(37.6 x 57.9 x 37.6 cm)
Weight24.7 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)
Airflow speed
A filterAnnual filter cost ($)+- 130
- Lifespan
- Replacement cost ($)
Pre-filter (2 pack)
+- 25
HEPA filter
- Lifespan
- Replacement cost ($)
Max2 (Green True HEPA filter)
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Max2 (Activated carbon filter)
1 year
Ionizer/ Technologies
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Max2 Filter
1 year
+- 129.99
Optional/ Addon
Noise level22 - 52 dB
Power consumption6 - 66 W
Timer/ Scheduler1, 2, 4, 8 hours (App), Scheduler
SensorsPollution sensor, Light sensor
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty5 years
Email/ Phone support

Product image

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)
  • 4 fanspeed (Sleep, 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)
  • Scheduler/ Timer via IoCare app (1, 2, 4, 8 hours)
  • 5 years warranty

The starters

Airmega 400S dimension
14.8 x 22.8 x 14.8 in
(37.6 x 57.9 x 37.6 cm)
Airmega 400S weight
24.7 lb (11.2 kg)

Simplicity meets modern architecture. Airmega 400S manage to perfect the art of design VS practicality by offering dual side air inlet hidden within its seamless design. Sharing the same dimension as Airmega 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 4 legs. Controls are located at the top black panel that is not obvious at first glance, it is simple to use with clear visual indicator for fanspeed, Smart mode, Wi-Fi, Light mode, Pre-filter and MAX2 filter. Upfront Airmega 400S comes with the standard ring air quality indicator that shows the current room air condition. Up to four different colors will be shown to indicate the current air quality status ranging from Good, Moderate, Unhealthy to Very Unhealthy. Other key specification in Airmega 400S that we will briefly go through including a 4-stage filtration, 4 fanspeed with Auto/ Sleep/ Eco mode, 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), 30 days money back guaranteed and 5 years warranty.

Like Airmega 300S, the 400S is also Wi-Fi enabled that allows you to control the air purifier at any place via Airmega mobile IoCare app. Pairing Airmega 400S 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 to Airmega 400S 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 weekly schedule when to turn on or off the air purifier. 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 include turning on/ off the air purifier, switching to Smart/ Sleep mode, changing the fan speed, set timer, filter life status and check air quality.

Airflow, CADR and everything in between

Airmega 400S coverage
Purifying coverage
1560 sq. ft. (145 m2)
Airmega 400S fanspeed
Airmega 400S is the highest end in the series so naturally it also has best in-class purifying coverage. With 2 air charges every 30 minutes expect 1560 sq. ft. purifying coverage and 780 sq. ft. coverage at 4 air charges every 15 minutes. For normal non-allergic situation, the wide 2 charges purifying coverage is more than sufficient for most room size including living hall. Fanspeed is available in 4 different setting + Auto mode as standard with all Airmega models.
Airmega 400S dust CADR
350 cfm (595 m3/h)
Airmega 400S pollen CADR
Pollen CADR
350 cfm (595 m3/h)
Airmega 400S smoke CADR
Smoke CADR
350 cfm (595 m3/h)
Airmega 400S CADR is also equally impressive as the purifying coverage. Overall dust, pollen and smoke have a high 350 cfm figures; Higher than most air purifiers output within the segment as you can compare more via the comparison table above.

What’s inside count

Airmega 400S Pre-filter
Pre-filter (2 pack)
Airmega 400S HEPA filter
Max2 (Green True HEPA filter)
1 year
Airmega 400S carbon filter
Max2 (Activated carbon filter)
1 year
^ Airmega 400S filters/ technologies/ lifespan
^ Airmega 400S filters/ lifespan/ price
Airmega 400S uses the same filtration setup as all Airmega air purifiers which is essentially dual pre-filter plus Max2 filter bundled (Green True HEPA filter and Activated Carbon filter). Each pre-filter would be place at both side of air inlet that clear out any incoming airflow contaminants before reaching to the Max2 filter. 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 to be exact) in capturing mold/ pollen, bacteria, germs, food smells, VOCs, cigarette smoke and pet odors. Sadly there is no optional Ionizer included though not a big miss for some.There is no differences between Airmega 400S and 400S in terms of filters size and depth.

Airmega 400S is covered against

Airmega 400S VS Dust



Airmega 400S VS Pollen



Airmega 400S VS Hair

Hair/ Pet hair


Airmega 400S VS Dust mite

Dust mites


Airmega 400S VS Mold/ Mildew

Mold/ Mildew


Airmega 400S VS Pet dander

Pet dander


Airmega 400S VS Virus/ Germ

Virus/ Germ


Airmega 400S VS Tobacco smoke

Tobacco smoke


Airmega 400S VS Chemical



Airmega 400S VS VOCs



Airmega 400S VS Smoke/ Gas

Smoke/ Gas


Airmega 400S VS Odor



Without doubt Airmega 400S 4-stage filtration is very efficient when pit against large scale and small, micron size pollutants, allergens, irritants, bacteria and viruses. Powered by strong airflow circulation and wide 1560 sq. ft. purifying coverage, Airmega 400S included Pre-filter (2 pack) Max2 (Green True HEPA filter) filtration is amazing in eliminating dust, pet hair, dust mites, pollen, mold, spores, mildew, fungi, germs and pet dander.  On dealing smokes, odors and fumes, Airmega 400S Max2 (Activated carbon filter) is also amazing against chemicals, detergent odors, cooking smell, fire, VOCs, cigarette smokes.

Keep it down

Airmega 400S noise level
Noise level
22 - 52 dB
Airmega 400S power consumption
Power consumption
6 - 66 W
Airmega 400S noise level is exactly the same as Airmega 400. Reasonable but not overly silent at low speed and slightly lower normal conversion noise level at max speed. Power consumption is in identical pattern with low consumption rate at sleep/ low speed and high consumption at medium/ high speed. To further enhanced Airmega 400S air purifier eco-friendliness, there is ECO mode where Airmega 400S would shut down the fan when the room air quality is good for at least 10 minutes plus Sleep/ Auto mode where the air purifier would only run at higher speed when the surrounding air quality is bad.

At what cost

Airmega 400S MRSP/ RSP
+- 849
Airmega 400S annual filter replacement cost
Annual Filter Cost
+- 130
^ Airmega 400S replacement filters estimated cost
Airmega 400S is the highest in the brand hierarchy and as a result it is the costliest. We do think it's worth every penny you paid however, if you have no use of the features or the strong airflow delivery rate, maybe its time to reconsider the smaller model Airmega 300S or other equivalent models. Annual filter replacement cost is equally pricey but do note its in a bundled set which consist of both HEPA and Activated Carbon filter.

The challengers

Airmega 400

Airmega 400

Identical in every way except its around $100 cheaper due to the lack of Wi-Fi support.

Airmega 300S

Again cheaper version identical in almost every way except the lack of Auto sleep mode, Light sensor and filter real-time usage indicator.

In conclusion......

  • 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 side of air inlet.
  • Outstanding allergens and smoke filtration via its MAX2 filter which is essentially a full-size HEPA filter + Carbon filter.
  • Auto mode that automatically adjust the fanspeed based on room air quality.
  • Light/ sleep mode that automatically tone down the fanspeed when the room is dark.
  • Separate Pre-filter and MAX2 filter lifespan indicator that calculates filter life based on real time usage/ environment.
  • Timer + advance scheduler for 7 days customizable on and off time (via app).
  • Highly legible and accurate real-time air quality monitor.
  • Standard 5 years warranty.
  • The most expensive version in its series.
  • Filter replacement cost is high although it consist of both HEPA and Carbon filter.
  • App is less refined and intuitive compare 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.
Build quality
Airflow delivery
Particle Filtration
Smoke Filtration
Airmega 400S

Frequently Asked Questions (FAQ)FAQ

Can I connect my Airmega air purifier to multiple smartphones?

Yes you can and it’s not limited to android or apple smartphones only. Download the IoCare app through iTunes or Google Play and sign in with the same credentials.

I have more than one Airmega installed at home. Can I connect to multiple products?

Yes you can. Simply add the products in the application.

What happen if I change my router? Do I need to redo the Airmega pairing again?

That depends if you are using the same SSID and/ or password for the new router. No changes needed if everything remains the same, otherwise please delete the current air purifier from your application and redo the pairing steps to relink the air purifier again.

Why I can’t connect my Airmega with my phone after following all the steps?

Please check whether your Wi-Fi router support 2.4GHz band (through SSID network or on the router label itself). There are two common frequency bands used in Wi-Fi communication: 2.4GHz and 5GHz. Most modern routers support both bands and can be set to broadcast 2 different networks or set to broadcast only one band. Airmega can only connect to 2.4GHz band so if you have a router that only supports 5 GHz band, you’re out of luck.

My Wi-Fi network doesn’t show up at all.

There are few common reasons that would to Wi-Fi no show. No internet connection, Wi-Fi disruption, Wi-Fi name is hidden or pushed down from the list. Restarting your router is the first thing to do that should resolve most issues including internet connectivity issue. If the Wi-Fi network still doesn’t show up, try hard reboot by unplugging the router, wait for at least 10 seconds before plugging back the router and restart again until you see steady power and connection indicator lights on the router. Reduce the number of connections to the router would help as well. If all fails, try moving Airmega closer to router or move away any metal/ home appliances object that could be interfering with the Wi-Fi connection.

Why can’t I scan the product barcode?

First thing first, make sure there is barcode scanner app install on your phone. Second make sure the barcode scanner app has permission to use the camera mode in your iOS and android. Third try to find an open space with enough light source for the camera to capture. Also move the camera further back if you have issue focusing on the camera. If all fails, manually input the serial number to the application.

Help! I forget my Wi-Fi router password.

Hard reset your Wi-Fi router. There is nothing on Airmega side can do.

Where can I find the troubleshooting guide for the Airmega air purifier?

You can find the troubleshooting guide on the owner’s manual and product page itself at or Airmega official website.

Why is my Airmega Wi-Fi connection cut off frequently?

If your Airmega Wi-Fi cut off frequently, there could be Wi-Fi interference that cause the poor Wi-Fi connection. Try moving the air purifier closer to the router/ modem or reduce the number of connected appliances on the Wi-Fi network.

Why isn’t my city appearing in the Outdoor Air Quality index?

The app does not offer Outdoor Air Quality index in every city of the United States. The best action is to choose the location closest to your city.

How to change Airmega to a new time zone?

Please go to Settings and select Time Zone. Click on the Location button to find your new location and click on the Save button.

I did not receive any filter change/clean notifications update on my app even though the indicator light is showing on Airmega?

Please check if the notification setting is off on you iOS or Android. To receive future notification, please turn on the feature.

Wi-Fi indicator light occasionally blink. What does it mean?

If the Wi-Fi LED light is blinking: No connection has been made or pairing is the progress. If is constant LED: Wi-Fi is connected. If there is no LED light: Wi-Fi is off.

Why there is no beeping sound when I press the Wi-Fi icon and Light icon together for the pairing?

Please check if Airmega is turn on. If there is no indicator lights illuminated, check the power source or switch to another electrical outlet.

Airmega isn’t responding to command from the app/ Remote control function not working.

Check if Airmega is powered on and Wi-Fi LED light is on. If Wi-Fi LED light is blinking, there could be internet connection issue or Airmega is not connected to the Wi-Fi network. Reduce the number of devices connected to the Wi-Fi network and see if it helps. Or else try restarting the router/ modem or move Airmega closer to the router.

There is delay on command sent from the mobile app to the air purifier.

Reduce the number of connection to the Wi-Fi network or place Airmega closer to the router.

Why is the Indoor Air Quality indicator on my Airmega different from what the app is showing?

Check if Airmega Wi-Fi LED light is on. Reduce the number of devices connected to the Wi-Fi network.

App does not show any changes on the filter lifetime level monitoring/ graph is showing flat.

Make sure Airmega Wi-Fi LED light is not off or blinking. Reduce the number of devices connected to the same Wi-Fi network.

Airmega doesn’t react according to the timer or scheduler settings in the app.

Most likely scenario is the incorrect time zone on the app or timer/ scheduler has been changed by another user. Also please note that timer will always reset every time you turn off Airmega.

Airmega 400S Troubleshooting

Safety Tips

More on Airmega 400S

Airmega 400S predictable reliability and durability is the greatest attribute that owner would take pleasure in for its modern aesthetic. Firstly, with only 2 color selections, Airmega 400S simplistic air vent combines well with the air purifier framework. Interface panel are perfectly linked and ergonomically placed to enable streamline navigation. Airmega 400S is perfectly fitted that would definitely withstand some harsh usage.

Airmega 400S airflow efficiency and purifying coverage

This is where Airmega 400S air flow delivery rate figures count. Airmega 400S is ideal for house with large-sized space area, the excellent air flow applicable radius is wider than its own Airmega 300 series in both 2 and 4 air charges mode. Moving forward with the purifying performance, Airmega 400S high-performance air flow distribution would take care contaminants quickly without any problem. Dust, dust mite, pollen, mold, mildew, pet dander and fungus within its purifying range would not stand a chance agaisnt the air purifier effective air flow capability.

Maintenance and care

No issue with the upkeeping of Airmega 400S thanks to its well-shaped framework particularly in its segment. To prevent any kind of clog on the airflow intake and outtake, use a brush to sweep and brush off any dust on the surface. Family that is regularly utilize the air purifier would appreciate how straightforward the air purifier could be clean on unavoidable dust.

Noise level and power consumption

Airmega 400S nicely balanced setup could rapidly purifies its nearby air within a decent noise level. Barely any noise at minimum fan speed and loud but not at a tremendous level sound at maximum rate. Compare with other usual household appliances, Airmega 400SAirmega 400S noise level is still within a justifiable rate.In the meantime, You would most certainly not get burden by the electrical bills on standard utilization of Airmega 400S. Power usage is quite minimal at low fanspeed and reasonable at higher fan speed. Airmega 400S all-round power usage compare with other household appliances is very similar.

Final thoughts on Airmega 400S

Overall, we are satisfied with Airmega 400S practicality in conjunction with the air flow delivery rate. While all air purifiers have their particular advantages/disadvantages, you would reap more on the advantages without compromising much on the shortcomings. Combines the above attributes, needless to say Airmega 400S is the product that we would recommend.

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