Levoit Core 200S-P
AHAM verified
- Really cleans
- 137 sq ft12 m² 12 m²137 sq ft
- Box says
- 672 sq ft62 m² 4.9× overstated
- New filter
- 6–8 months
Coway · Airmega 100
Coway Airmega 100
Not verified. A verified model that cleans at least as much: Levoit Core 300, 217 sq ft20 m².
Really cleansNot verified
164 sq ft15 m² 15 m²164 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Purifies 810 ft² in 60 minsPurifies 810 ft² in 60 mins (75 m²) 4.9× overstated
- New filter
- Every 12 months
See it on Amazon: Coway Airmega 100Paid link
A small Coway tower with a PM2.5 sensor. The CADR is Coway's own figure, not independently verified, so it's never one of our picks.
Verdict
Who it's for
Coway isn't in the AHAM directory, so nobody has checked its CADR. Taken at Coway's figure it suits a single bedroom. For a verified figure at this size, look at the Levoit Core 200S-P.
Good
- PM2.5 sensor and auto mode
- No ionizer
- Small footprint
Trade-offs
- CADR not independently verified
- Only enough air for small rooms
Spec facts
Coway Airmega 100 · Airmega 100
- Really cleans
- 164 sq ft · 15 m²15 m² · 164 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Smoke CADR
- 108 CFM · 183 m³/hMaker’s figure, not independently verified
- Maker’s claim: Coway · checked 1 Nov 2026
- Box claim
- Purifies 810 ft² in 60 minsPurifies 810 ft² in 60 mins (75 m²)4.9× overstated
- Maker’s claim: Coway · checked 1 Nov 2026
- Filter
- Coway Airmega 100 3-in-1 filter3-in-1: pre-filter, HEPA, activated carbon. 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 Airmega 100 3-in-1 filter
- Type
- 3-in-1: pre-filter, HEPA, activated carbon
- Replace every
- 12 months
- Power at top speed
- 25 W
A new filter every 12 months means 1 filter a year. At top speed it draws 25 W: 0.6 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 810 sq ft75 m². It really cleans 164 sq ft15 m².
To clean 810 sq ft75 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.
183 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 15.3 m² = 164.6 sq ft15.3 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Purifies 810 ft² in 60 mins”, the purifier really cleans 164 sq ft, 4.9 times less.Drawn to scale: the box says “Purifies 810 ft² in 60 mins”, the purifier really cleans 15 m², 4.9 times less.
Room sizes
Which rooms it fits
It suits 107 sq ft10 m² rooms: there it has 50% more air than the room needs, so it needn't run flat out. At 161 sq ft15 m² it only just keeps up (no air to spare), so it would run near its top speed, usually its loudest (why we don’t list noise).
Under a 2.7 m ceiling it covers 152 sq ft, under 3 m 137 sq ftUnder a 2.7 m ceiling it covers 14 m², under 3 m 12 m², so with a 3 m ceiling it no longer covers 161 sq ft15 m² (why).
For a 215 sq ft room or bigger it's too small, although the box claims 810 sq ft: the For a 20 m² room or bigger it's too small, although the box claims 75 m²: the 215 sq ft20 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 100 or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 137 sq ft, 27 sq ft lessCleans 12 m², 3 m² less, on a certified CADR. It has no air quality sensor. It needs filters more often (every 6–8 months) and draws 37 W at top speed. 7.6 cm shorter.
GermGuardian AC4825E
AHAM verified
- Really cleans
- 150 sq ft14 m² 14 m²150 sq ft
- Box says
- 743 sq ft69 m² 4.9× overstated
- New filter
- 6–8 months
Cleans 150 sq ft, 14 sq ft lessCleans 14 m², 1 m² less, on a certified CADR. It has no air quality sensor. It needs filters more often (every 6–8 months). 16.3 cm taller and 0.9 kg heavier.
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
Cleans 217 sq ft, 53 sq ft moreCleans 20 m², 5 m² more, 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. 3.6 cm shorter and 0.6 kg heavier.
Sources
Where these numbers come from
- Maker’s claim Coway Airmega 100 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.