Dyson Purifier Cool Formaldehyde TP09 review
Households wanting formaldehyde filtration alongside cooling fan function, and prepared to pay for it
By Tom Calder · Updated 24 July 2026 · Price checked against our tracker
The only purifier here with a dedicated formaldehyde-destroying catalytic filter, and it doubles as a cooling fan — genuinely useful if that's a real concern (new furniture, a recent renovation). At £549.99 it's roughly double the next most expensive model on this list, and Dyson doesn't publish a CADR figure, so you can't benchmark its raw filtering speed against rivals.
Consistent list price across three independent UK retailers as of Jul 2026.
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- Sealed HEPA H13 filter captures 99.95% of particles down to 0.1 microns
- Dedicated catalytic filter destroys over 99% of formaldehyde rather than just trapping it
- Doubles as a cooling fan, not just a purifier
- By far the most expensive model on this list — nearly triple the Levoit Core 300S
- No published CADR figure, so raw filtering speed can't be compared to the rest of this table
- Formaldehyde filtration is a niche need most households won't require
Key specs
| Room size | — |
| CADR | Not published by Dyson for this model |
| Filter | Sealed HEPA H13 + carbon + formaldehyde catalytic filter |
| Noise (min) | — |
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