Dyson - Purifier Big+Quiet Formaldehyde vs IQAir - HealthPro Plus
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dyson - Purifier Big+Quiet Formaldehyde | IQAir - HealthPro Plus |
|---|---|---|
| CADR | 640 m³/h | 470 m³/h |
| Coverage | 100 m² | 85 m² |
| Min noise | 24 dB | 25 dB |
Between the Purifier Big+Quiet Formaldehyde and HealthPro Plus, the Purifier Big+Quiet Formaldehyde comes out ahead in cadr / coverage, while the HealthPro Plus wins on several specs. Overall, the Purifier Big+Quiet Formaldehyde scores 89.3 and the HealthPro Plus scores 83.6 on our Mars Score.
Which should you buy?
The Purifier Big+Quiet Formaldehyde edges ahead on the Mars Score (89.3 vs 83.6), but the 5.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Purifier Big+Quiet Formaldehyde if you care most about cadr / coverage. The biggest gaps in its favor are cadr, coverage, min noise. The single most decisive one: CADR — 36.17% more. 640 m³/h vs 470 m³/h.
The HealthPro Plus 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: the Purifier Big+Quiet Formaldehyde is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Dyson - Purifier Big+Quiet Formaldehyde or IQAir - HealthPro Plus?
Dyson - Purifier Big+Quiet Formaldehyde leads the current Mars Score by 5.7 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 Dyson - Purifier Big+Quiet Formaldehyde if…
Dyson - Purifier Big+Quiet Formaldehyde has the measurable edge on cadr m3h, coverage m2, noise db min.
Choose IQAir - HealthPro Plus if…
IQAir - HealthPro Plus 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 Dyson - Purifier Big+Quiet Formaldehyde wins
- ▲CADR — 36.17% more. 640 m³/h vs 470 m³/h.
- ▲Coverage — 17.65% more. 100 m² vs 85 m².
- ▲Min noise — 1.00 dB less. 24 vs 25.
Why IQAir - HealthPro Plus wins
- No decisive advantages.
Spec comparison
Performance
| Spec | Dyson - Purifier Big+Quiet Formaldehyde | IQAir - HealthPro Plus |
|---|---|---|
| CADR | 640 m³/hlead | 470 m³/h |
| Coverage | 100 m²lead | 85 m² |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Dyson - Purifier Big+Quiet Formaldehyde | IQAir - HealthPro Plus |
|---|---|---|
| Min noise | 24 dBlead | 25 dB |
| Air quality sensor | truelead | false |
| Smart app | truelead | false |