Dyson hot
Dyson Purifier Hot+Cool Formaldehyde HP09
Clean Performance Index
Based on CADR, noise-to-power ratio, and filter longevity.
Our Verdict
"The only device you need all year round. It heats in winter, cools in summer, and purifies always. A true multi-tasker."
The Staff Take
All-season appliance logic is sound for small/medium rooms; remember heating draws serious watts—use thermostat caps so it is not always on full blast.
Ideal for these searches
This model is a strong match if you are looking for: best air purifier for your situation, room size, or concern in the UK.
- dyson hp09 review uk
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How We Tested This Model
- check_circleCADR and coverage parsed against UK room-size assumptions.
- check_circleNoise and power values normalized for side-by-side comparisons.
- check_circlePrice and availability signals refreshed monthly.
thumb_up Pros
- checkReplaces heater and fan
- checkThermostatic control
- checkDestroys formaldehyde
thumb_down Cons
- closeHigh power consumption when heating
- closeVery expensive
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Technical Specifications
Verified Lab Data
Winter heating assist mode
Smoke Decay Rate
18 min
Time to clean 10m³ test chamber from standard smoke density.
True Sound Floor
48.0 dB (Heat + purify)
Measured at 1m using high-fidelity acoustic testing equipment.
Active Power Draw
35 W
Real-world energy consumption measured during continuous high flow.