Between the Airmega 400 and HealthPro Plus, the Airmega 400 comes out ahead in cadr and min noise, while the HealthPro Plus wins on coverage. Overall, the Airmega 400 scores 78.3 and the HealthPro Plus scores 77.7 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (78.3 vs 77.7). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Airmega 400 if you care most about cadr and min noise. The biggest gaps in its favor are cadr, min noise.
Pick the HealthPro Plus if you care most about coverage. Its strongest claims are coverage.
Both ship with comparable true hepa h13+, activated carbon, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Coway - Airmega 400 wins
- ▲CADR — 50.00% more. 705 m³/h vs 470 m³/h.
- ▲Min noise — 3.00 dB less. 22 vs 25.
Why IQAir - HealthPro Plus wins
- ▲Coverage — 41.67% more. 85 m² vs 60 m².
Spec comparison
Performance
| Spec | Coway - Airmega 400 | IQAir - HealthPro Plus |
|---|---|---|
| CADR | 705 m³/hlead | 470 m³/h |
| Coverage | 60 m² | 85 m²lead |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Coway - Airmega 400 | IQAir - HealthPro Plus |
|---|---|---|
| Min noise | 22 dBlead | 25 dB |
| Air quality sensor | truelead | false |
| Smart app | truelead | false |
Frequently asked
Spec-level deep dives
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