Blueair - Blue Pure 311i+ Max vs Coway - Airmega 200M
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Blueair - Blue Pure 311i+ Max | Coway - Airmega 200M |
|---|---|---|
| CADR | 500 m³/h | 400 m³/h |
| Coverage | 35 m² | 33 m² |
| Min noise | 23 dB | 25 dB |
Between the Blue Pure 311i+ Max and Airmega 200M, the Blue Pure 311i+ Max comes out ahead in cadr / coverage, while the Airmega 200M wins on several specs. Overall, the Blue Pure 311i+ Max scores 77.4 and the Airmega 200M scores 74.2 on our Mars Score.
Which should you buy?
The Blue Pure 311i+ Max edges ahead on the Mars Score (77.4 vs 74.2), but the 3.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Blue Pure 311i+ Max if you care most about cadr / coverage. The biggest gaps in its favor are cadr, coverage, min noise. The single most decisive one: CADR — 25.00% more. 500 m³/h vs 400 m³/h.
The Airmega 200M similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable true hepa h13+, activated carbon, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Blueair - Blue Pure 311i+ Max or Coway - Airmega 200M?
Blueair - Blue Pure 311i+ Max leads the current Mars Score by 3.2 points.The more useful decision is the trade-off behind that result: compare cadr, coverage, min noise against the way you will actually use the product.
Choose Blueair - Blue Pure 311i+ Max if…
Blueair - Blue Pure 311i+ Max has the measurable edge on cadr m3h, coverage m2, noise db min.
Choose Coway - Airmega 200M if…
Coway - Airmega 200M does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Blueair - Blue Pure 311i+ Max wins
- ▲CADR — 25.00% more. 500 m³/h vs 400 m³/h.
- ▲Coverage — 6.06% more. 35 m² vs 33 m².
- ▲Min noise — 2.00 dB less. 23 vs 25.
Why Coway - Airmega 200M wins
- No decisive advantages.
Spec comparison
Performance
| Spec | Blueair - Blue Pure 311i+ Max | Coway - Airmega 200M |
|---|---|---|
| CADR | 500 m³/hlead | 400 m³/h |
| Coverage | 35 m²lead | 33 m² |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Blueair - Blue Pure 311i+ Max | Coway - Airmega 200M |
|---|---|---|
| Min noise | 23 dBlead | 25 dB |
| Air quality sensor | true | true |
| Smart app | truelead | false |