Levoit Core 300
AHAM verified
- Really cleans
- 217 sq ft20 m² 20 m²217 sq ft
- Box says
- 1,066 sq ft99 m² 4.9× overstated
- New filter
- 6–8 months
Coway · Airmega 150 (AP-1019C)
Coway Airmega 150
Not verified. A verified model that cleans at least as much: Blueair Blue Pure 511i Max, 233 sq ft21 m².
Really cleansNot verified
233 sq ft21 m² 21 m²233 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Purifies 1,035 ft² in 60 minsPurifies 1,035 ft² in 60 mins (96 m²) 4.4× overstated
- New filter
- Every 6–12 months
See it on Amazon: Coway Airmega 150Paid link
A slim, flat Coway purifier with an air quality sensor. Coway's CADR isn't independently verified, so we don't pick it.
Verdict
Who it's for
Coway prints the honest room size next to the big one, which we like. Taken at Coway's figure it suits a large bedroom, but nobody has verified that figure, so we point you to verified models of the same size.
Good
- Air quality sensor and auto mode
- Slim, flat shape
- No ionizer
Trade-offs
- CADR not independently verified
- Deodorization filter needs changing every six months
Spec facts
Coway Airmega 150 · Airmega 150 (AP-1019C)
- Really cleans
- 233 sq ft · 21 m²21 m² · 233 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Smoke CADR
- 153 CFM · 260 m³/hMaker’s figure, not independently verified
- Maker’s claim: Coway · checked 1 Nov 2026
- Box claim
- Purifies 1,035 ft² in 60 minsPurifies 1,035 ft² in 60 mins (96 m²)4.4× overstated
- Maker’s claim: Coway · checked 1 Nov 2026
- Filter
- Coway Airmega 150 filter setPre-filter + deodorization filter (6 months) + 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 Airmega 150 filter set
- Type
- Pre-filter + deodorization filter (6 months) + HEPA (1 year)
- Replace every
- 6–12 months
- Power at top speed
- 35 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 35 W: 0.8 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 1,035 sq ft96 m². It really cleans 233 sq ft21 m².
To clean 1,035 sq ft96 m² it would only change the air in the room 1.1 times 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.
260 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 21.7 m² = 233.2 sq ft21.7 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Purifies 1,035 ft² in 60 mins”, the purifier really cleans 233 sq ft, 4.4 times less.Drawn to scale: the box says “Purifies 1,035 ft² in 60 mins”, the purifier really cleans 21 m², 4.4 times less.
Room sizes
Which rooms it fits
It suits 161 sq ft15 m² rooms: there it has 40% more air than the room needs, so it needn't run flat out. At 215 sq ft20 m² it only just keeps up (5% to spare), so it would run near its top speed, usually its loudest (why we don’t list noise). In a 107 sq ft10 m² room it's more than twice the size needed; a smaller model does the job.
Under a 2.7 m ceiling it covers 215 sq ft, under 3 m 194 sq ftUnder a 2.7 m ceiling it covers 20 m², under 3 m 18 m², so with a 3 m ceiling it no longer covers 215 sq ft20 m² (why).
For a 269 sq ft room or bigger it's too small, although the box claims 1,035 sq ft: the For a 25 m² room or bigger it's too small, although the box claims 96 m²: the 269 sq ft25 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.
Room pages it qualifies for
Alternatives
The Coway Airmega 150 or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 217 sq ft, 16 sq ft lessCleans 20 m², 1 m² less, on a certified CADR. It has no air quality sensor. It needs filters more often (every 6–8 months) and draws 56 W at top speed. 11 cm shorter and 1.9 kg lighter.
Levoit Vital 100S-P
AHAM verified
- Really cleans
- 217 sq ft20 m² 20 m²217 sq ft
- Box says
- 1,066 sq ft99 m² 4.9× overstated
- New filter
- 6–12 months
Cleans 217 sq ft, 16 sq ft lessCleans 20 m², 1 m² less, on a certified CADR. Same sensor, ionizer and filter interval. 6.4 cm shorter and 1.6 kg lighter.
Blueair Blue Pure 511i Max
AHAM verified
- Really cleans
- 233 sq ft21 m² 21 m²233 sq ft
- Box says
- 1,138 sq ft106 m² 4.9× overstated
- New filter
- 9 months
Cleans the same 233 sq ftCleans the same 21 m², on a certified CADR. It has a different filter schedule (every 9 months) and draws 17 W at top speed. 10.2 cm shorter and 3.6 kg lighter.
Sources
Where these numbers come from
- Maker’s claim Coway Airmega 150 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.