Comparison
Levoit, Winix or Coway? Matching Each Brand to a Room
Short answer
By ENERGY STAR's numbers the three are built for different rooms: the Levoit Core 400S for about 358 sq ft, the Winix C610 for about 384 sq ft and the Coway Airmega 400 for about 583 sq ft. Choose by room first, then by features: the Levoit and Winix add Wi-Fi, the Coway has a sensor mode but no Wi-Fi. A brand cannot be judged on this data for noise, filter cost or durability, because ENERGY STAR does not report them.
Who should pick what
- A bedroom or small room, with an app Levoit Core 400S air purifier
- 358sq ft
- 231CADR
- 237kWh/yr
- A small-to-mid room, with an app and filters included Winix C610 air purifier
- 384sq ft
- 248CADR
- 235kWh/yr
- A large living area of about 580 sq ft Coway Airmega 400 air purifier
- 583sq ft
- 376CADR
- 366kWh/yr
Side-by-side comparison
| Criterion | Levoit Core 400S | Winix C610 | Coway Airmega 400 |
|---|---|---|---|
| Recommended room size | 358 sq ft | 384 sq ft | 583 sq ft |
| CADR (smoke / dust / pollen) | 231 / 240 / 259 cfm | 248 / 252 / 262 cfm | 376 / 384 / 409 cfm (best in this row) |
| Energy use | 237 kWh/yr | 235 kWh/yr (best in this row) | 366 kWh/yr |
| Filter type | HEPA-Type | HEPA-Type | Composite Filter; second filter: Composite Filter |
| Connectivity and auto mode | Wi-Fi connected; automatic mode: Air Quality Sensor,Timer | Wi-Fi connected; automatic mode: Air Quality Sensor | Not connected; automatic mode: Air Quality Sensor |
| Ozone emissions | 0 ppb | 1 ppb | 0 ppb |
| ENERGY STAR | Yes | Yes | Yes |
All figures are from ENERGY STAR's certified room air cleaner data (queried 2026-11-06). Noise level, filter replacement cost and warranty are not in that data, so we leave them out rather than guess. Highlighted = best value in the row: highest CADR, IEF, CEER, run time or suction; lowest yearly energy use or weight. Sources for every figure are listed under “Sources” below.
CADR (smoke), cfm: higher cleans air faster
Recommended room size, sq ft
Yearly energy use, kWh: lower is cheaper to run
How we compared: key criteria
- Room sizeENERGY STAR publishes a recommended room size for each certified model. Pick a model sized to the room: ENERGY STAR notes larger models use more energy, and its CADR chart is only an estimate.
- CADR, and what it measuresCADR (clean air delivery rate, in cfm) measures how quickly a unit delivers filtered air; ENERGY STAR lists it separately for smoke, dust and pollen, which are particles. A higher CADR serves a larger area. ENERGY STAR's CADR chart assumes an 8-foot ceiling, and it advises a higher CADR if your ceilings are higher.
- Energy per unit of roomThe Levoit Core 400S lists 237 kWh per year for 358 sq ft, the Winix C610 235 kWh for 384 sq ft and the Coway Airmega 400 366 kWh for 583 sq ft. The Winix is the lightest user per room-size in this trio; ENERGY STAR says a standard room air cleaner uses about 394 kWh per year.
- Features that differWi-Fi: Levoit and Winix yes, Coway no. Automatic mode: all three list an air-quality sensor. Ozone emissions: 0 ppb for the Levoit Core 400S and the Coway, 1 ppb for the Winix C610 in ENERGY STAR's data.
- What is not comparedNoise, filter cost, warranty and build quality are not in the ENERGY STAR data. We do not rank the brands on them.
Our picks
Pick Levoit if…
Levoit Core 400S air purifier
- 358sq ft
- 231CADR
- 237kWh/yr
Why we'd pick it: you have a room of roughly 360 sq ft and want Wi-Fi and a sensor mode: CADR 231 / 240 / 259 cfm, 237 kWh per year, 0 ppb ozone emissions.
Skip it if… your room is above about 360 sq ft; ENERGY STAR also lists a 363 sq ft Levoit row, so confirm the code on the box.
View on Amazon — Levoit Core 400S air purifier on Amazon.comPick Winix if…
Winix C610 air purifier
- 384sq ft
- 248CADR
- 235kWh/yr
Why we'd pick it: you want a slightly larger recommended room (384 sq ft) at about the same energy: CADR 248 / 252 / 262 cfm, 235 kWh per year, Wi-Fi.
Skip it if… you want a single purifier without a bundle: the Amazon listing includes two years of filters, so what you pay includes them.
View on Amazon — Winix C610 air purifier on Amazon.comPick Coway if…
Coway Airmega 400 air purifier
- 583sq ft
- 376CADR
- 366kWh/yr
Why we'd pick it: your room is large, about 583 sq ft: CADR 376 / 384 / 409 cfm, 366 kWh per year, sensor mode, 0 ppb ozone emissions.
Skip it if… you need Wi-Fi or a small room; it lists no app, and Amazon prints the code as AP-2015F(G).
View on Amazon — Coway Airmega 400 air purifier on Amazon.comDownsides and when not to buy
- The data compares only room size, CADR, energy and a few features. It does not tell you which is quietest or cheapest to run.
- The three are rated for different rooms, so comparing CADR across them says more about size than about quality.
- Filter type labels are ENERGY STAR's program labels (“HEPA-Type”, “Composite Filter”), not independent filter tests.
When the pricier option isn't worth it
The Coway's larger room rating is not worth its higher energy use if your room is closer to 360 than 580 sq ft; ENERGY STAR notes larger models use more energy.
Who should skip this product type
Skip all three if you need odor or gas removal: the data here measures particles only.
Extra costs, installation and compatibility
- Ongoing costs
- Replacement filters are a recurring cost not shown here, and the Coway lists two filters. The Winix C610 on Amazon is a bundle that includes two years of filters.
- Installation and space
- Dimensions and weight are not in ENERGY STAR's data; check each manufacturer's page for fit.
- Compatibility
- All three are ENERGY STAR-listed for the US market. The Levoit and Winix need Wi-Fi for app control.
Frequently asked questions
Which is best for a bedroom?
By recommended room size, the Levoit Core 400S (358 sq ft) or the Winix C610 (384 sq ft). Noise levels are not in ENERGY STAR's data, so check the manufacturer's page.
Does the Winix C610 produce ozone?
ENERGY STAR's data lists 1 ppb ozone emissions for the C610, versus 0 ppb for the Levoit Core 400S and Coway Airmega 400.
View on Amazon
Levoit
Levoit Core 400S air purifier
- 358sq ft
- 231CADR
- 237kWh/yr
Mid-size smart purifier with an air-quality sensor and Wi-Fi.
Amazon lists this as Model Number Core 400S (Model Name Core 400S-P). ENERGY STAR lists two Levoit rows; the figures here are the row named “Core 400S” (358 sq ft). The other row, LAP-C401S-WUSR, is rated 363 sq ft, so check the model code on the box.
View on Amazon — Levoit Core 400S air purifier on Amazon.comWinix
Winix C610 air purifier
- 384sq ft
- 248CADR
- 235kWh/yr
Mid-size Winix with Wi-Fi and a sensor-driven automatic mode.
This Amazon listing is a bundle: the C610 purifier plus two years of replacement filters. The purifier is included; the filters add to what you pay.
View on Amazon — Winix C610 air purifier on Amazon.comCoway
Coway Airmega 400 air purifier
- 583sq ft
- 376CADR
- 366kWh/yr
Large-room Coway with a sensor-driven automatic mode.
Amazon prints the model number as AP-2015F(G); ENERGY STAR lists AP-2015F. A second Amazon listing for the Airmega 400 (B01C9RIACG, model 111012) exists; we link the AP-2015F one.
View on Amazon — Coway Airmega 400 air purifier on Amazon.comLinks to Amazon.com are plain product links. We may earn a commission in the future if we join affiliate programs; this never decides what we recommend. Prices and availability change, so we don't print them — check the current details on Amazon. See our Affiliate Disclosure.
Research method, sources and review date
Research-based comparison: we compare manufacturer specifications, user manuals and published guidance, and note where a figure is a manufacturer claim. We do not test products in a lab. Figures come from ENERGY STAR's certified room air cleaner data (queried 2026-11-06); sizing guidance comes from ENERGY STAR. Amazon.com was checked only to confirm each model exists and to find its listing, not as a source of specifications. How we compare · Editorial policy
Sources
- ENERGY STAR certified room air cleaners data: Levoit Core 400S (data.energystar.gov, queried 2026-11-06)
- ENERGY STAR certified room air cleaners data: Winix C610 (data.energystar.gov, queried 2026-11-06)
- Winix America: C610 4-stage True HEPA air purifier product page (winixamerica.com, read 2026-11-06)
- ENERGY STAR certified room air cleaners data: Coway Airmega 400 (AP-2015F) (data.energystar.gov, queried 2026-11-06)
- ENERGY STAR: Air Cleaners (buying guidance, CADR and room-size chart)
Update log
- — Rebuilt (IPK-BUILD-5) around models confirmed to exist on Amazon.com. Figures come from ENERGY STAR certified-product data and, where we could read one, the manufacturer page; where a source does not state a figure we say so. Models not found on Amazon.com were removed from the picks.