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

CADR: Dyson Purifier Hot+Cool Formaldehyde HP09 lists 190 CFM class (Air Multiplier 77 gallons/sec circulation) (Dyson sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists 141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen) (Levoit sheet, 2026-09-02).
Coverage area: Dyson Purifier Hot+Cool Formaldehyde HP09 lists 500 sq ft room size with 350° oscillation (Dyson sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists 219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/hr) (Levoit sheet, 2026-09-02).
Room size: Dyson Purifier Hot+Cool Formaldehyde HP09 lists Medium to large bedrooms, living rooms up to 500 sq ft (Dyson sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists Bedrooms, nurseries, home offices up to 219 sq ft (5 ACH) / up to 1,095 sq ft (1 ACH) (Levoit sheet, 2026-09-02).
Filter types: Dyson Purifier Hot+Cool Formaldehyde HP09 lists 360° Glass HEPA H13 + Activated Carbon + Cryptomic Formaldehyde filter (Dyson sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists 3-Stage filtration: Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon filter (Levoit sheet, 2026-09-02).
Filter life: Dyson Purifier Hot+Cool Formaldehyde HP09 lists 12 months (HEPA/Carbon) / Permanent Formaldehyde catalyst (Dyson sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists 6 to 8 months (Levoit sheet, 2026-09-02).

Manufacturer list price, not a live offer. Confirm current pricing before you buy.

Dyson Purifier Hot+Cool Formaldehyde HP09

$7992 spec wins

Swap

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Winix 5500-2 Air Purifier$159 Levoit Core 400S$219 Coway Airmega AP-1512HH Mighty$229 Blueair Blue Pure 311i Max$229 Honeywell HPA300 HEPA Air Purifier$249 Levoit Core 600S Smart True HEPA$299 Blueair Blue Pure 211+ Auto$339 Coway Airmega 250$399 Coway Airmega 400$549 Blueair Protect 7470i$649 Alen BreatheSmart 75i Large Room Air Purifier$749

Levoit Core 300S Smart True HEPA Air Purifier

$1492 spec wins

Swap

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Buying for

Every rankable spec counts once. Pick a lens to score only what matters for your air purifier.

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.

2 Dyson Purifier Hot+Cool Formaldehyde HP094 rankable of 11 specsLevoit Core 300S Smart True HEPA Air Purifier 2

Deal-breakers

tick what would make you walk away

Over 55 dB on highrow
Louder than normal conversation at full speed.
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)
Under 1,000 sq ft coveragerow
Undersized for an open-plan living area.
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.

2 of 2 differ

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)

Upfront price + 3 years of consumables, fees & essential add-ons

Dyson Purifier Hot+Cool Formaldehyde HP09

Upfront list price$799

3-Yr 360° Combi Glass HEPA + Carbon (Every 12 months (~$80/yr))+$240

3-Year Estimated Total$1,039

Levoit Core 300S Smart True HEPA Air Purifier

Upfront list price$149

3-Yr Replacement filter (Every 6–8 months (~$26/yr))+$78

3-Year Estimated Total$227

Room Placement & Bedroom Noise Check

Physical clearance required for airflow, wall placement, and bedroom noise levels.

Ergonomic & Spatial Check

Wall Clearance Required

Cylindrical 360° filters cannot sit flush against walls without choking intake.

Dyson

Cylindrical base: needs 12 in airflow clearance around unit

Levoit

360° intake requires 15 in perimeter clearance from walls

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Dyson

28 dB night mode with dimmed LCD

Levoit

22 dB whisper mode (practically inaudible on nightstand)

Unit Footprint & Dimensions

Dyson

Bladeless oval loop (30.0 × 8.1 × 8.1 in; 12.6 lb; heats & cools)

Levoit

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.

Post-Purchase Truths

Dyson: What to watch for

Hidden Cost
High replacement filter cost (~$80 each).
The catalytic formaldehyde combo filter is significantly more expensive than standard box purifiers from Levoit or Coway.

Levoit: What to watch for

Hardware Quirk
No true HEPA H13 rating on recent replacement filters.
Due to US regulatory naming updates, Levoit adjusted terminology from "True HEPA" to "HEPASmart" on several retail filter packs.
Maintenance
Filter check light does not measure real dirt; it operates on a fixed timer.
The filter replacement alert triggers every 6 months regardless of whether your room was smoky or pristine, requiring manual reset.

Dyson Purifier Hot+Cool Formaldehyde HP09$7992 wins

Levoit Core 300S Smart True HEPA Air Purifier$1492 wins

Performance Filters Usability & Smart Design & Ownership

11 of 11 attributes differ. Identical rows are dimmed.

Performance

leads 2-0

Performance specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Levoit Core 300S Smart True HEPA Air Purifier.
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

Filters specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Levoit Core 300S Smart True HEPA Air Purifier.
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

Usability & Smart specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Levoit Core 300S Smart True HEPA Air Purifier.
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

Design & Ownership specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Levoit Core 300S Smart True HEPA Air Purifier.
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)

Most rows are from the official spec sheet. Marked rows are other published figures or our summary, not lab tests we ran.

Dyson Purifier Hot+Cool Formaldehyde HP09 source Levoit Core 300S Smart True HEPA Air Purifier source

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

Full Dyson Purifier Hot+Cool Formaldehyde HP09 specs →

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)

Full Levoit Core 300S Smart True HEPA Air Purifier specs →

Best for each use

Bedrooms

Quiet nights: low-speed noise, sleep mode, schedules from your phone

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
Weight: 5.95 lb vs 12.6 lb
It is also $650 cheaper.

Big rooms & allergies

Open-plan rooms or allergies: CADR, coverage, filter grade

For big rooms & allergies, buy the Dyson Purifier Hot+Cool Formaldehyde HP09.

Leads 2 of 2 rankable big rooms & allergies specs.
CADR: 190 CFM class vs 141 CFM / 240 m³/h
Coverage area: 500 sq ft room size with 350° oscillation vs 219 sq ft
Levoit Core 300S Smart True HEPA Air Purifier is $650 cheaper. Pay the difference only if cadr matters to you.

Low running cost

Cheap to own: filter life, power draw, warranty

Too close to call on low running cost from the spec sheets.

Filter life: 12 months vs 6 to 8 months
Energy consumption: 40 W vs 23 W max power

Every answer above is scored from published figures. A lens uses only the rows that matter for that use, including marked rows that are not on the official sheet. Switch lenses interactively in the panel above.

Done deciding?

Open the full standalone spec sheet for either device.

Dyson Purifier Hot+Cool Formaldehyde HP09 spec sheet Levoit Core 300S Smart True HEPA Air Purifier spec sheet

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.

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