At a Glance
Pros
- Strong airflow and CADR
- Smart mode is responsive
- Lower cost than 400
- Quiet operation
Cons
- Still large compared to many purifiers
- No Wi-Fi on some versions
Key Specifications
You'll Love This Product If...
Great for bedrooms, living rooms, and apartments needing powerful yet quiet purification.
You Might Want to Skip This If...
Not ideal for users wanting app controls or a compact purifier.
How This Product Affects Your Indoor Air Quality
Coway’s well-tuned Auto Mode and filtration system deliver reliable large-room purification with minimal noise.
How We Tested This Product
Performance testing showed the 300 trailing the 400 slightly in airflow but remaining highly competitive in real-world IAQ improvement.
Alternatives to Consider
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
Winix 5500-2 Air Purifier
by Winix
Well-priced air purifier with true HEPA, washable carbon filter, and Auto mode, popular for medium to large rooms.
$160–$250
Final Verdict
The Airmega 300 offers similar performance to the 400 but in a slightly smaller footprint, making it ideal for large bedrooms and living spaces.