Air purifiersENERGY STAR certified
Winix AT40
265 cfm fan and filter air purifier.
Smoke CADR
265 cfm
Room size
411 sq ft
Annual energy use
272 kWh/yr
Filter
HEPA-Type
Of 225 certified fan and filter air purifiers, 177 have a higher efficiency than the AT40 (5.6 CADR/W).
- Maker
- Winix
- Model
- AT40
- Type
- Fan and Filter
- Room size
- 411 sq ft
- Smoke CADR
- 265 cfm
- PM2.5 CADR
- 261 cfm
- Dust CADR
- 259 cfm
- Efficiency
- 5.6 CADR/W
- Annual energy use
- 272 kWh/yr
- Filter
- HEPA-Type
- Ozone emissions
- 0 ppb
- Automatic mode
- Air Quality Sensor
- On the market since
- May 2026
- ENERGY STAR certified
- 29 May 2026
Certified under the same record
The maker lists these as the same machine or a variant of it: AT41.
Source: ENERGY STAR certified air purifiers dataset, US EPA, record 4618154, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the AT40
Certified air purifiers from other makers, same color class, within 20% of its speed.
| Model | Type | Smoke CADR | Room size | Annual energy use |
|---|---|---|---|---|
| MEDIFY AIR MA-50-V3.0 | Fan and Filter | 264 cfm | 409 sq ft | 252 kWh/yr |
| SIESEAN AP-480 | Fan and Filter | 270 cfm | 419 sq ft | 245 kWh/yr |
| CUCKOO CAC-R1510FW | Fan and Filter | 271 cfm | 420 sq ft | 281 kWh/yr |
| Blueair 7411371000 | Fan and Filter | 272 cfm | 422 sq ft | 294 kWh/yr |
| Honeywell HPA6000B | Fan and Filter | 257 cfm | 398 sq ft | 207 kWh/yr |
| Coway AP-1523D | Fan and Filter | 255 cfm | 395 sq ft | 219 kWh/yr |