• 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 app (1, 2, 4, 8 hours)
• 5 years warranty

The starters

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 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 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 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 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 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.

Keep it down

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 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

In conclusion......

 

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