Dyson Purifier Cool Formaldehyde TP09 review
Households wanting formaldehyde filtration alongside cooling fan function, and prepared to pay for it
By Tom Calder · Price last checked 20 Sep 2026, 12:29 BST · price-tracked
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.
as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.ⓘ As an Amazon Associate, PreparedBritain earns from qualifying purchases. We may earn a commission when you buy, or a fee when you request a quote, through our links — it never affects what we recommend. Amazon prices come from Amazon's own product data and show the date and time they were retrieved. Prices at other retailers are checked by us, less often. Prices and stock can change at any time, so always check the retailer's price before you buy.
- 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
Who shouldn't buy this
you just want straightforward pollen and dust filtration for a normal room — a HEPA purifier a fraction of the price does that job just as well.
Key specs
| Room size | — |
| CADR | Not published by Dyson for this model |
| Filter | Sealed HEPA H13 + carbon + formaldehyde catalytic filter |
| Noise (min) | — |
Our rating is a considered spec-and-evidence verdict: we verify every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who a product isn't for. Commissions never change a rating. Read the full methodology →
Alternatives to consider
as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Want this cheaper?
Prices for 364 tracked products are refreshed daily — last sweep 20 September 2026. Leave your email and we'll tell you when it drops — nothing else.