Head to head
Dyson Purifier Hot+Cool Formaldehyde HP09 vs Levoit Core 400S
They split the 4 rankable specs evenly, so cost decides it: Levoit Core 400S costs $580 less.
Catalog as of September 1, 2026
Why, in numbers
Swap
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Compare a different air purifier
Levoit Core 300S Smart True HEPA Air Purifier$149Winix 5500-2 Air Purifier$159Coway Airmega AP-1512HH Mighty$229Blueair Blue Pure 311i Max$229Honeywell HPA300 HEPA Air Purifier$249Levoit Core 600S Smart True HEPA$299Blueair Blue Pure 211+ Auto$339Coway Airmega 250$399Coway Airmega 400$549Blueair Protect 7470i$649Alen BreatheSmart 75i Large Room Air Purifier$749Buying for
Straight answer
Overall: 2 to 2
Tied overall. Levoit Core 400S is cheaper.
- The 4 rankable overall specs split 2 to 2.
- Saves $580 at list price.
Deal-breakers
tick what would make you walk away
- Trips:Dyson Purifier Hot+Cool Formaldehyde HP09 · 46 dB (Low) – 62 dB (Max)Clear:Levoit Core 400S · 24 dB (Sleep mode) – 52 dB (High mode)
- Trips:Dyson Purifier Hot+Cool Formaldehyde HP09 · 500 sq ft room size with 350° oscillati…Trips:Levoit Core 400S · 403 sq ft
At a glance
The handful of numbers that decide most purchases in this category.
CADR
Dyson
190 CFM class (Air Multiplier 77 gallons/sec circulation)
Levoit
260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen)
Coverage area
Dyson
500 sq ft room size with 350° oscillation
Levoit
403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr)
True 3-Year Cost of Ownership (TCO)
Dyson Purifier Hot+Cool Formaldehyde HP09
Levoit Core 400S
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Cylindrical base: needs 12 in airflow clearance around unit
360° intake requires 15 in perimeter clearance from walls
Nighttime Sleep Mode Noise
28 dB night mode with dimmed LCD
24 dB quiet sleep mode
Unit Footprint & Dimensions
Bladeless oval loop (30.0 × 8.1 × 8.1 in; 12.6 lb; heats & cools)
Mid-sized cylinder (10.8 × 10.8 × 20.5 in; 11.0 lb)
The 90-Day Owner Regret Check
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Dyson: What to watch for
- Hidden Cost
High replacement filter cost (~$80 each).
Levoit: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Performance
3 differences| CADR | 190 CFM class (Air Multiplier 77 gallons/sec circulation) | 260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) (wins this row: higher) |
|---|---|---|
| Room size | Medium to large bedrooms, living rooms up to 500 sq ft | Bedrooms, apartments, mid-size living spaces |
| Coverage area | 500 sq ft room size with 350° oscillation (wins this row: higher) | 403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) |
Filters
2 differences| Filter types | 360° Glass HEPA H13 + Activated Carbon + Cryptomic Formaldehyde filter | 3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon |
|---|---|---|
| Filter life | 12 months (HEPA/Carbon) / Permanent Formaldehyde catalyst | 6–12 months |
Usability & Smart
leads 1-0| Noise levels | 46 dB (Low) – 62 dB (Max) | 24 dB (Sleep mode) – 52 dB (High mode) (wins this row: lower) |
|---|---|---|
| Energy consumption | 40 W (Purifier mode) / 1,575 W (Heating mode) | 38 W max power consumption |
| Smart features | MyDyson App, voice control via Alexa, Google Assistant, Siri Shortcuts | VeSync Wi-Fi App, Amazon Alexa, Google Assistant voice control |
| Air quality sensors | Solid-state formaldehyde sensor, PM2.5, PM10, VOC, NO2, Temperature, Humidity | AirSight Plus Laser Dust Sensor with PM2.5 numerical display and 4-color ring |
Design & Ownership
leads 1-0| Weight | 12.6 lb (5.7 kg) (wins this row: lower) | 14.1 lb (6.4 kg) |
|---|---|---|
| Warranty | 2 years | 2 years limited warranty |
Which one should you buy
Pick this one if
Dyson Purifier Hot+Cool Formaldehyde HP09
3-in-1 purifier, ceramic space heater, and cooling fan with solid-state catalytic formaldehyde sensor.
- Combines HEPA H13 purification, fast ceramic heating, and cooling fan in one
- Destroys formaldehyde continuously without filter replacement
- Fully sealed whole-machine HEPA H13 standard prevents bypass
What you give up
- CADR airflow is lower than dedicated box purifiers
- Expensive upfront purchase price
Pick this one if
Levoit Core 400S
Smart air purifier with H13 True HEPA filtration, AirSight Plus laser dust sensor, and VeSync app control.
- Whisper-quiet 24 dB sleep mode with completely dimmable light display
- AirSight Plus laser sensor provides real-time PM2.5 numerical readings
- VeSync smartphone app with scheduling, filter life tracking, and voice control
What you give up
- Coverage is sized for medium bedrooms and living rooms (under 1,000 sq ft)
- Activated carbon layer is a coated sheet rather than heavy pellet bed
Best for each use
Bedrooms
Tied on bedrooms. Levoit Core 400S is cheaper.
Big rooms & allergies
Tied on big rooms & allergies. Levoit Core 400S is cheaper.
Low running cost
Too close to call on low running cost from the spec sheets.
Done deciding?
Open the full standalone spec sheet for either device.
Manufacturer pages: Dyson Purifier Hot+Cool Formaldehyde HP09 ↗ · Levoit Core 400S ↗
Common questions
Which is cheaper, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Levoit Core 400S?
Levoit Core 400S costs $580 less at list price.
What is the biggest catch with the Dyson Purifier Hot+Cool Formaldehyde HP09 or Levoit Core 400S?
Dyson Purifier Hot+Cool Formaldehyde HP09 has this deal-breaker: over 55 dB on high. Louder than normal conversation at full speed.
Which is better for bedrooms, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Levoit Core 400S?
Tied on bedrooms. Levoit Core 400S is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $580 at list price.
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 7 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.