Rank 2 of 6 in Air purifiers Sources disagree
Dyson Purifier Cool Formaldehyde (TP09)
5 tests from 3 countries · 4 of them not from the UK
Score by criterion
Air cleaning 90
Ease of use 90
Prices · United Kingdom
Retailers
Strengths
- Detects many pollutants (PM2.5, PM10, formaldehyde, VOC, NO2) and reacts quickly (TechRadar)
- The app provides real-time readings and air-quality history (TechRadar)
- Ventilation and environmental properties good, safety very good (Stiftung Warentest 3/2024)
Weaknesses
- Air cleaning only satisfactory, handling – the weakest point – only sufficient (Stiftung Warentest 3/2024)
- Does not remove odours; as a fan merely decent, not powerful (TechRadar)
- Loud and too expensive for what it offers (Homes & Gardens)
- Two of the five verdicts date from 2021 and 2022 (Guter Rat, Mac Life)
Tests reviewed
| Source | Country | Issue | Original verdict | Converted |
|---|---|---|---|---|
| Guter Rat | Germany | Ausgabe 9/2021 · as reported by testberichte.de | Note 1,7 | 87 |
| Mac Life | Germany | Ausgabe 8/2022 · as reported by testberichte.de | Note 1,5 | 90 |
| Stiftung Warentest | Germany | test 3/2024, Luftreiniger mit Ventilatorfunktion · as reported by testberichte.de | befriedigend (2,6) | 74 |
| TechRadar | United Kingdom | 08/2025 | 4.5/5 | 90 |
| Homes & Gardens | USA | 06/2024 | 3.5/5 | 70 |
Where the tests disagree.
Each dot is the average test result of one country, converted to 0–100. The further apart the dots, the more it pays to read the individual reports.
Dyson Purifier Cool Formaldehyde (TP09) ± 10 pts
Specifications
| Filter | HEPA H13 and activated carbon |
|---|---|
| Dimensions | 22 × 22 × 105 cm |
| Weight | 4.85 kg |