Head to head

Dyson Purifier Hot+Cool Formaldehyde HP09 vs Coway Airmega AP-1512HH Mighty

Coway Airmega AP-1512HH Mighty leads 4 to 1 on the 5 rankable specs and costs $570 less, which makes it the straightforward pick.

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); Coway Airmega AP-1512HH Mighty lists 233 CFM (Smoke), 246 CFM (Dust), 240 CFM (Pollen) (Coway 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); Coway Airmega AP-1512HH Mighty lists 361 sq ft (4.8 air changes/hr) / 874 sq ft (2 air changes/hr) (Coway 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); Coway Airmega AP-1512HH Mighty lists Bedrooms, home offices, medium living rooms (Coway 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); Coway Airmega AP-1512HH Mighty lists 4-Stage: Washable Pre-filter + Deodorization Carbon + True HEPA + Vital Ion (Coway 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); Coway Airmega AP-1512HH Mighty lists 12 months (True HEPA) / 6 months (Carbon) (Coway sheet, 2026-09-02).

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

Dyson Purifier Hot+Cool Formaldehyde HP09

$7991 spec win

Swap

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Levoit Core 300S Smart True HEPA Air Purifier$149 Winix 5500-2 Air Purifier$159 Levoit Core 400S$219 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

Coway Airmega AP-1512HH Mighty

$2294 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: 1 to 4

Buy the Coway Airmega AP-1512HH Mighty.

Leads 4 of 5 rankable overall specs; Dyson Purifier Hot+Cool Formaldehyde HP09 takes 1.
CADR: 233 CFM vs 190 CFM class
Noise levels: 24 dB vs 46 dB
It is also $570 cheaper.

Check first: the Coway Airmega AP-1512HH Mighty has no Wi-Fi app. Tick them under deal-breakers if that rules it out.

1 Dyson Purifier Hot+Cool Formaldehyde HP095 rankable of 11 specsCoway Airmega AP-1512HH Mighty 4

Deal-breakers

tick what would make you walk away

No Wi-Fi approw
No schedules or remote control from your phone.
Clear:Dyson Purifier Hot+Cool Formaldehyde HP09 · MyDyson App, voice control via Alexa, G…Trips:Coway Airmega AP-1512HH Mighty · Smart Auto Mode + Eco Mode
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:Coway Airmega AP-1512HH Mighty · 24 dB (Low) – 53 dB (Turbo high)
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:Coway Airmega AP-1512HH Mighty · 361 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)

Coway

233 CFM (Smoke), 246 CFM (Dust), 240 CFM (Pollen)

Coverage area

Dyson

500 sq ft room size with 350° oscillation

Coway

361 sq ft (4.8 air changes/hr) / 874 sq ft (2 air changes/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

Coway Airmega AP-1512HH Mighty

Upfront list price$229

3-Yr HEPA + 2x carbon pack (Annual filter pack (~$30/yr))+$90

3-Year Estimated Total$319

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

Coway

Front-intake design: can sit almost flush against walls (leaves floor space open)

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Dyson

28 dB night mode with dimmed LCD

Coway

24.4 dB lowest speed (vital ionizer can be toggled off)

Unit Footprint & Dimensions

Dyson

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

Coway

Boxy square unit (16.8 × 18.3 × 9.6 in; 12.3 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.

Coway: What to watch for

Hardware Quirk
Ionizer ("Vital Ion") produces negligible ozone and should be disabled.
Many asthma and allergy sufferers immediately toggle the optional ionizer off to ensure completely emission-free mechanical HEPA filtration.

Dyson Purifier Hot+Cool Formaldehyde HP09$7991 win

Coway Airmega AP-1512HH Mighty$2294 wins

Performance Filters Usability & Smart Design & Ownership

11 of 11 attributes differ. Identical rows are dimmed.

Performance

3 differences

Performance specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Coway Airmega AP-1512HH Mighty.
CADR	190 CFM class (Air Multiplier 77 gallons/sec circulation)	233 CFM (Smoke), 246 CFM (Dust), 240 CFM (Pollen) (wins this row: higher)
Room size	Medium to large bedrooms, living rooms up to 500 sq ft	Bedrooms, home offices, medium living rooms
Coverage area	500 sq ft room size with 350° oscillation (wins this row: higher)	361 sq ft (4.8 air changes/hr) / 874 sq ft (2 air changes/hr)

Filters

2 differences

Filters specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Coway Airmega AP-1512HH Mighty.
Filter types	360° Glass HEPA H13 + Activated Carbon + Cryptomic Formaldehyde filter	4-Stage: Washable Pre-filter + Deodorization Carbon + True HEPA + Vital Ion
Filter life	12 months (HEPA/Carbon) / Permanent Formaldehyde catalyst	12 months (True HEPA) / 6 months (Carbon)

Usability & Smart

leads 1-0

Usability & Smart specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Coway Airmega AP-1512HH Mighty.
Noise levels	46 dB (Low) – 62 dB (Max)	24 dB (Low) – 53 dB (Turbo high) (wins this row: lower)
Energy consumption	40 W (Purifier mode) / 1,575 W (Heating mode)	77 W max (Energy Star verified, 4.9W in Eco mode)
Smart features	MyDyson App, voice control via Alexa, Google Assistant, Siri Shortcuts	Smart Auto Mode + Eco Mode (no Wi-Fi app)
Air quality sensors	Solid-state formaldehyde sensor, PM2.5, PM10, VOC, NO2, Temperature, Humidity	Air quality particle sensor with 3-color real-time LED indicator

Design & Ownership

leads 2-0

Design & Ownership specifications. Middle column is Dyson Purifier Hot+Cool Formaldehyde HP09, right column is Coway Airmega AP-1512HH Mighty.
Weight	12.6 lb (5.7 kg)	12.3 lb (5.6 kg) (wins this row: lower)
Warranty	2 years	3 years limited manufacturer warranty (wins this row: higher)

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 Coway Airmega AP-1512HH Mighty 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

Coway Airmega AP-1512HH Mighty

Award-winning compact 4-stage True HEPA air purifier with Vital Ionizer and energy-saving Eco mode.

High smoke and particulate filtration efficiency in a compact footprint
Eco Mode powers off fan automatically after 30 minutes of clean air
Washable pre-filter extends the life of internal carbon and HEPA filters

What you give up

No Wi-Fi connectivity or mobile smartphone app
Ionizer feature produces trace ozone if left enabled

Full Coway Airmega AP-1512HH Mighty specs →

Best for each use

Bedrooms

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

For bedrooms, buy the Coway Airmega AP-1512HH Mighty.

Leads 2 of 2 rankable bedrooms specs.
Noise levels: 24 dB vs 46 dB
Weight: 12.3 lb vs 12.6 lb
It is also $570 cheaper.

Big rooms & allergies

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

Tied on big rooms & allergies. Coway Airmega AP-1512HH Mighty is cheaper.

The 2 rankable big rooms & allergies specs split 1 to 1.
Saves $570 at list price.

Low running cost

Cheap to own: filter life, power draw, warranty

Too close to call on low running cost from the spec sheets. Only warranty is rankable here.

Filter life: 12 months vs 12 months
Energy consumption: 40 W vs 77 W max

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 Coway Airmega AP-1512HH Mighty spec sheet

Manufacturer pages: Dyson Purifier Hot+Cool Formaldehyde HP09 ↗ · Coway Airmega AP-1512HH Mighty ↗

Common questions

Which is cheaper, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Coway Airmega AP-1512HH Mighty?

Coway Airmega AP-1512HH Mighty costs $570 less at list price.

What is the biggest catch with the Dyson Purifier Hot+Cool Formaldehyde HP09 or Coway Airmega AP-1512HH Mighty?

Coway Airmega AP-1512HH Mighty has this deal-breaker: no Wi-Fi app. No schedules or remote control from your phone.

Which is better for bedrooms, the Dyson Purifier Hot+Cool Formaldehyde HP09 or the Coway Airmega AP-1512HH Mighty?

For bedrooms, buy the Coway Airmega AP-1512HH Mighty. Leads 2 of 2 rankable bedrooms specs. Noise levels: 24 dB vs 46 dB

What cannot be compared from spec sheets?

Of the 11 specs tracked here, 6 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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