Levoit Core 400S-P
AHAM verified
- Really cleans
- 356 sq ft33 m² 33 m²356 sq ft
- Box says
- 1,718 sq ft160 m² 4.8× overstated
- New filter
- 6–12 months
Coway · AP-1512N
Coway Airmega Mighty2
Not verified. A verified model that cleans at least as much: Levoit Vital 200S-P, 381 sq ft35 m².
Really cleansNot verified
365 sq ft33 m² 33 m²365 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Purifies 1,800 ft² in 60 minsPurifies 1,800 ft² in 60 mins (167 m²) 4.9× overstated
- New filter
- Every 12 months
The newer Mighty, with a laser PM sensor and one combined filter. Coway's CADR figure isn't independently verified.
Verdict
Who it's for
Coway's update to the Mighty has a laser sensor that reads PM1, PM2.5 and PM10, one combined carbon and HEPA filter that lasts a year, and no ionizer. As with every Coway, the CADR is Coway's own figure, so we don't make it a pick.
Good
- Laser PM sensor and auto mode
- One combined filter, changed once a year
- No ionizer
Trade-offs
- CADR not independently verified
- Box headline is based on one air change an hour
Spec facts
Coway Airmega Mighty2 · AP-1512N
- Really cleans
- 365 sq ft · 33 m²33 m² · 365 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Smoke CADR
- 240 CFM · 408 m³/hMaker’s figure, not independently verified
- Maker’s claim: Coway · checked 1 Nov 2026
- Box claim
- Purifies 1,800 ft² in 60 minsPurifies 1,800 ft² in 60 mins (167 m²)4.9× overstated
- Maker’s claim: Coway · checked 1 Nov 2026
- Filter
- Coway Max2 filter (Mighty2)Washable pre-filter + activated carbon and HEPA in one filter. Replace every 12 months
- Maker’s claim: Coway · checked 1 Nov 2026
Maker’s claim: the manufacturer’s own figure, not independently checked. Where figures come from
Running it
Filter and upkeep
- Replacement filter
- Coway Max2 filter (Mighty2)
- Type
- Washable pre-filter + activated carbon and HEPA in one filter
- Replace every
- 12 months
- Power at top speed
- 56 W
A new filter every 12 months means 1 filter a year. At top speed it draws 56 W: 1.3 kWh if it ran flat out all day. Slower settings use less.
We have no Amazon link for this filter: the maker's page in the sources sells or lists it.
Source: Maker’s claim, Coway, checked 1 Nov 2026
The box vs the maths
The box says 1,800 sq ft167 m². It really cleans 365 sq ft33 m².
To clean 1,800 sq ft167 m² it would only change the air in the room 1 time an hour. We size every purifier at 4.8 air changes an hour, the level AHAM's room-size guideline works out to.
Coway's figure is the room it can change the air of once an hour, and the wording says as much. That's a real number, but at one air change an hour smoke and pollen come back in nearly as fast as the purifier removes them. The CADR behind both numbers is Coway's own; AHAM hasn't certified it.
408 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 34 m² = 365.8 sq ft34 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Purifies 1,800 ft² in 60 mins”, the purifier really cleans 365 sq ft, 4.9 times less.Drawn to scale: the box says “Purifies 1,800 ft² in 60 mins”, the purifier really cleans 33 m², 4.9 times less.
Room sizes
Which rooms it fits
It suits 215 sq ft20 m² and 269 sq ft25 m² rooms best: there it has 32–65% more air than the room needs, so it needn't run flat out. At 322 sq ft30 m² it only just keeps up (10% to spare), so it would run near its top speed, usually its loudest (why we don’t list noise). In rooms of 161 sq ft15 m² or less it's more than twice the size needed; a smaller model does the job.
Under a 2.7 m ceiling it covers 338 sq ft, under 3 m 304 sq ftUnder a 2.7 m ceiling it covers 31 m², under 3 m 28 m², so with a 3 m ceiling it no longer covers 322 sq ft30 m² (why).
For a 376 sq ft room or bigger it's too small, although the box claims 1,800 sq ft: the For a 35 m² room or bigger it's too small, although the box claims 167 m²: the 376 sq ft35 m² page lists models that cover it.
All of this rests on Coway's own CADR figure. AHAM hasn't certified it, so we never make it a pick; a certified model is the safer buy at the same size.
Alternatives
The Coway Airmega Mighty2 or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 356 sq ft, 9 sq ft lessCleans the same 33 m², on a certified CADR. It needs filters more often (every 6–12 months) and draws 38 W at top speed. 6.5 cm taller and 1.9 kg lighter.
Levoit Vital 200S-P
AHAM verified
- Really cleans
- 381 sq ft35 m² 35 m²381 sq ft
- Box says
- 1,862 sq ft173 m² 4.9× overstated
- New filter
- 6–12 months
Cleans 381 sq ft, 16 sq ft moreCleans 35 m², 2 m² more, on a certified CADR. It needs filters more often (every 6–12 months). 4.7 cm taller and 0.9 kg lighter.
Winix 5510
AHAM verified
- Really cleans
- 385 sq ft35 m² 35 m²385 sq ft
- Box says
- 392 sq ft36 m² about right
- New filter
- 12 months
Cleans 385 sq ft, 20 sq ft moreCleans 35 m², 2 m² more, on a certified CADR. It has an ionizer you can switch off. 10.8 cm taller and 0.9 kg lighter.
Sources
Where these numbers come from
- Maker’s claim Coway Airmega Mighty2 product page and specifications · Coway
We don't test purifiers ourselves: every figure on this page is copied from these sources and was last checked on 1 Nov 2026. Spotted one that's wrong or out of date? Tell us and we'll fix it and change the date.