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-1512HH
Coway Airmega AP-1512HH Mighty
Not verified. A verified model that cleans at least as much: Levoit Core 400S-P, 356 sq ft33 m².
Really cleansNot verified
355 sq ft32 m² 32 m²355 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Purifies 1,748 ft² in 60 minsPurifies 1,748 ft² in 60 mins (162 m²) 4.9× overstated
- New filter
- Every 6–12 months
One of the best-selling purifiers in the US. Coway's CADR isn't independently verified, so it's never one of our picks.
Verdict
Who it's for
Hugely popular and widely reviewed, but Coway isn't in the AHAM directory, so its CADR is Coway's own. At that figure it would clean an average living room. Its ionizer can be switched off. For a verified figure at this size, the Levoit Core 400S-P is the match.
Good
- Dust sensor and auto mode
- Ionizer can be switched off
- Compact for its output
Trade-offs
- CADR not independently verified
- Deodorization filter needs changing every six months
Spec facts
Coway Airmega AP-1512HH Mighty · AP-1512HH
- Really cleans
- 355 sq ft · 32 m²32 m² · 355 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Smoke CADR
- 233 CFM · 396 m³/hMaker’s figure, not independently verified
- Maker’s claim: Coway · checked 1 Nov 2026
- Box claim
- Purifies 1,748 ft² in 60 minsPurifies 1,748 ft² in 60 mins (162 m²)4.9× overstated
- Maker’s claim: Coway · checked 1 Nov 2026
- Filter
- Coway AP-1512HH filter setWashable pre-filter + deodorization filter (6 months) + True HEPA (1 year). Replace every 6–12 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 AP-1512HH filter set
- Type
- Washable pre-filter + deodorization filter (6 months) + True HEPA (1 year)
- Replace every
- 6–12 months
- Power at top speed
- 77 W
A new filter every 6–12 months means 1–2 filters a year. Its parts wear out at different rates, as the type above says, so the range covers both. At top speed it draws 77 W: 1.8 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 1,748 sq ft162 m². It really cleans 355 sq ft32 m².
To clean 1,748 sq ft162 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.
396 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 33 m² = 355.1 sq ft33 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Purifies 1,748 ft² in 60 mins”, the purifier really cleans 355 sq ft, 4.9 times less.Drawn to scale: the box says “Purifies 1,748 ft² in 60 mins”, the purifier really cleans 32 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 28–60% more air than the room needs, so it needn't run flat out. At 322 sq ft30 m² it only just keeps up (6% 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 328 sq ft, under 3 m 295 sq ftUnder a 2.7 m ceiling it covers 30 m², under 3 m 27 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 1,748 sq ft: the For a 35 m² room or bigger it's too small, although the box claims 162 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 AP-1512HH Mighty 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, 1 sq ft moreCleans 33 m², 1 m² more, on a certified CADR. It has no ionizer. It draws 38 W at top speed. 5.5 cm taller and 0.6 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, 26 sq ft moreCleans 35 m², 3 m² more, on a certified CADR. It has no ionizer. It draws 50 W at top speed. 3.7 cm taller.
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, 30 sq ft moreCleans 35 m², 3 m² more, on a certified CADR. It goes longer between filters (every 12 months) and draws 65 W at top speed. 9.8 cm taller.
Sources
Where these numbers come from
- Maker’s claim Coway Airmega AP-1512HH Mighty product page and specifications · Coway
- Maker’s manual Coway AP-1512HH user manual (PDF) · 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.