At a Glance
Pros
- Dual-intake design moves large volumes of air
- Smart mode reacts quickly to pollutants
- High build quality
- Long-lasting filters
Cons
- Larger and heavier than most units
- Higher upfront cost
Key Specifications
You'll Love This Product If...
Large households, allergy sufferers, and buyers who need top-tier filtration with hands-off automation.
You Might Want to Skip This If...
Not ideal if you need a compact purifier or are on a strict budget.
How This Product Affects Your Indoor Air Quality
Coway’s dual suction system allows the Airmega 400 to purify large rooms efficiently while keeping noise levels surprisingly low.
How We Tested This Product
The 400 performed exceptionally in sustained PM2.5 load tests, maintaining clean air even during continuous pollutant introduction.
Alternatives to Consider
IQAir HealthPro Plus Air Purifier
by IQAir
Professional-grade air purifier with HyperHEPA filtration, designed for people with serious allergies, asthma, and chemical sensitivities.
$900–$1,300
Blueair Blue Pure 211+ Air Purifier
by Blueair
High-CADR air purifier with simple one-button control and 360° intake, ideal for large rooms and open living areas.
$250–$350
Final Verdict
The Airmega 400 is a powerful dual-intake air purifier designed for large spaces with excellent filtration efficiency and quiet operation.