Honeywell - HPA300 vs Xiaomi - Mi Smart Air Purifier 4 Pro
Between the HPA300 and Mi Smart Air Purifier 4 Pro, the HPA300 comes out ahead in cadr, while the Mi Smart Air Purifier 4 Pro wins on coverage. Overall, the HPA300 scores 65 and the Mi Smart Air Purifier 4 Pro scores 70.3 on our Mars Score.
Which should you buy?
The Mi Smart Air Purifier 4 Pro edges ahead on the Mars Score (65 vs 70.3), but the 5.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the HPA300 if you care most about cadr. The biggest gaps in its favor are cadr.
Pick the Mi Smart Air Purifier 4 Pro if you care most about coverage. Its strongest claims are coverage.
Both ship with comparable true hepa h13+, activated carbon, min noise, so those specs don't separate the two — focus on the differences below.
Bottom line: the Mi Smart Air Purifier 4 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Honeywell - HPA300 wins
- ▲CADR — 2.00% more. 510 m³/h vs 500 m³/h.
Why Xiaomi - Mi Smart Air Purifier 4 Pro wins
- ▲Coverage — 36.36% more. 60 m² vs 44 m².
Spec comparison
Performance
| Spec | Honeywell - HPA300 | Xiaomi - Mi Smart Air Purifier 4 Pro |
|---|---|---|
| CADR | 510 m³/hlead | 500 m³/h |
| Coverage | 44 m² | 60 m²lead |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Honeywell - HPA300 | Xiaomi - Mi Smart Air Purifier 4 Pro |
|---|---|---|
| Min noise | 32 dB | 32 dB |
| Air quality sensor | false | truelead |
| Smart app | false | truelead |
Frequently asked
Spec-level deep dives
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