Air purifier comparison
Dyson TP09 vs TP07 — Is the Formaldehyde Sensor Worth the Upgrade?
TP09 adds solid-state formaldehyde detection and catalytic destruction to the TP07's sealed HEPA platform. Here's whether that matters for your home.
| Spec | Dyson Purifier Cool Formaldehyde TP09 | Dyson Purifier Cool TP07 | Verdict |
|---|---|---|---|
| HEPA filtration | H13 fully sealed, 99.95% @ 0.1 µm | H13 fully sealed, 99.95% @ 0.1 µm | Tie |
| Carbon filter | Activated carbon | Activated carbon | Tie |
| Formaldehyde sensor | Solid-state HCHO sensor (lifetime) | No | Dyson |
| Formaldehyde destruction | Yes — catalytic to H₂O + CO₂ | No | Dyson |
| Air Multiplier oscillation | 350° | 350° | Tie |
| Coverage | Up to 81 m² | Up to 81 m² | Tie |
| Cooling fan | Yes | Yes | Tie |
| Heating function | No | No | Tie |
| Price difference | + ~$120 | Base price | — |
Verdict
If formaldehyde is a real concern in your home — newly built, freshly painted, recent furniture purchases, or known off-gassing items — the TP09's sensor and catalytic filter are genuinely valuable. The catalytic filter never needs replacing for the formaldehyde function, so the upfront premium is the only cost. For older homes with no known formaldehyde sources, the TP07 covers all the major air-quality basics at a meaningfully lower price.
Shop the Dyson
Dyson Purifier Cool Formaldehyde TP09
$1,035 · Delivery in 3–7 business days worldwide
View all products→Sources & references
- Dyson Ltd. — official product specifications — manufacturer-stated motor specs, attachment compatibility, regional warranty.
- Coandă effect — Wikipedia — physics behind air-flow hair styling.
- HEPA filtration standards — Wikipedia — H13 vs H14 filter classifications.