Head to head
Dyson Purifier Hot+Cool Formaldehyde HP09 vs Levoit Core 300S Smart True HEPA Air Purifier
They split the 4 rankable specs evenly, so cost decides it: Levoit Core 300S Smart True HEPA Air Purifier costs $650 less.
Catalog as of September 1, 2026
Why, in numbers
Swap
Compare a different air purifier
Winix 5500-2 Air Purifier$159Levoit Core 400S$219Coway 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$749Swap
Compare a different air purifier
Winix 5500-2 Air Purifier$159Levoit Core 400S$219Coway 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 300S Smart True HEPA Air Purifier is cheaper.
- The 4 rankable overall specs split 2 to 2.
- Saves $650 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 300S Smart True HEPA Air Purifier · 22 dB (Sleep mode) – 48 dB (High speed)
- Trips:Dyson Purifier Hot+Cool Formaldehyde HP09 · 500 sq ft room size with 350° oscillati…Trips:Levoit Core 300S Smart True HEPA Air Purifier · 219 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
141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen)
Coverage area
Dyson
500 sq ft room size with 350° oscillation
Levoit
219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/hr)
True 3-Year Cost of Ownership (TCO)
Dyson Purifier Hot+Cool Formaldehyde HP09
Levoit Core 300S Smart True HEPA Air Purifier
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
22 dB whisper mode (practically inaudible on nightstand)
Unit Footprint & Dimensions
Bladeless oval loop (30.0 × 8.1 × 8.1 in; 12.6 lb; heats & cools)
Compact cylinder (8.7 × 8.7 × 14.2 in; 5.9 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
- Hardware Quirk
No true HEPA H13 rating on recent replacement filters.
- Maintenance
Filter check light does not measure real dirt; it operates on a fixed timer.
Performance
leads 2-0| CADR | 190 CFM class (Air Multiplier 77 gallons/sec circulation) (wins this row: higher) | 141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen) |
|---|---|---|
| Room size | Medium to large bedrooms, living rooms up to 500 sq ft | Bedrooms, nurseries, home offices up to 219 sq ft (5 ACH) / up to 1,095 sq ft (1 ACH) |
| Coverage area | 500 sq ft room size with 350° oscillation (wins this row: higher) | 219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/hr) |
Filters
2 differences| Filter types | 360° Glass HEPA H13 + Activated Carbon + Cryptomic Formaldehyde filter | 3-Stage filtration: Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon filter |
|---|---|---|
| Filter life | 12 months (HEPA/Carbon) / Permanent Formaldehyde catalyst | 6 to 8 months |
Usability & Smart
leads 1-0| Noise levels | 46 dB (Low) – 62 dB (Max) | 22 dB (Sleep mode) – 48 dB (High speed) (wins this row: lower) |
|---|---|---|
| Energy consumption | 40 W (Purifier mode) / 1,575 W (Heating mode) | 23 W max power (Energy Star Certified) |
| Smart features | MyDyson App, voice control via Alexa, Google Assistant, Siri Shortcuts | VeSync App (iOS/Android), voice control via Amazon Alexa and Google Assistant |
| Air quality sensors | Solid-state formaldehyde sensor, PM2.5, PM10, VOC, NO2, Temperature, Humidity | AirSight Plus Laser Dust Sensor (real-time PM2.5 with 4-color air quality ring) |
Design & Ownership
leads 1-0| Weight | 12.6 lb (5.7 kg) | 5.95 lb (2.7 kg) (wins this row: lower) |
|---|---|---|
| Warranty | 2 years | 2 years limited warranty (with registration) |
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 300S Smart True HEPA Air Purifier
Compact smart air purifier with 3-stage True HEPA H13 filtration, VortexAir technology, and VeSync app smart control.
- Whisper-quiet 22dB Sleep Mode
- Compact footprint ideal for bedrooms and home offices
- Full smart app control and Alexa/Google voice integration
What you give up
- Designed for smaller to medium rooms (up to 219 sq ft for 5 ACH)
- Laser dust sensor only measures PM2.5 (no VOC / gas sensor)
Best for each use
Bedrooms
For bedrooms, buy the Levoit Core 300S Smart True HEPA Air Purifier.
Big rooms & allergies
For big rooms & allergies, buy the Dyson Purifier Hot+Cool Formaldehyde HP09.
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 300S Smart True HEPA Air Purifier ↗
Common questions
Which is cheaper, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Levoit Core 300S Smart True HEPA Air Purifier?
Levoit Core 300S Smart True HEPA Air Purifier costs $650 less at list price.
What is the biggest catch with the Dyson Purifier Hot+Cool Formaldehyde HP09 or Levoit Core 300S Smart True HEPA Air Purifier?
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 300S Smart True HEPA Air Purifier?
For bedrooms, buy the Levoit Core 300S Smart True HEPA Air Purifier. Leads 2 of 2 rankable bedrooms specs. Noise levels: 22 dB vs 46 dB
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.