Winix AT40: CADR, room size and running cost
Smoke CADR 265 cfm · Room size 411 sq ft (ENERGY STAR) · 272.02 kWh/yr ≈ $49.81/yr electricity (estimate)
Certified specs
| Smoke CADR | 265 cfm |
|---|---|
| Dust CADR | 259 cfm |
| Pollen CADR | 244 cfm |
| PM2.5 CADR | 261 cfm |
| ENERGY STAR effective room size | 411 sq ft (1.55 × smoke CADR, per 10 CFR 429.68) |
| Annual energy use | 272.02 kWh/yr |
| Integrated energy factor | 5.6 cfm/W |
| Smoke CADR per watt | 5.72 cfm/W |
| Ozone emissions (reported) | 0 ppb |
| Technology | Fan and Filter |
| Filter types listed | HEPA-Type |
| Automatic mode | Air Quality Sensor |
| Connected (app/Wi-Fi) | Yes (Wi-Fi) |
| ENERGY STAR Most Efficient | No |
| Markets | United States, Canada |
| Date certified | 2026-05-29 |
| ENERGY STAR partner | WINIX Inc. |
| Other model numbers ENERGY STAR lists as equivalent | AT41 |
| Source | ENERGY STAR record 4618154 · Product Finder page |
How many air changes per hour would it give?
Estimate: air changes per hour (ACH) = smoke CADR × 60 ÷ room volume, at the top fan speed used for the CADR test. Real-world ACH is usually lower (lower fan speeds, furniture, filter loading).
| Room | ACH, 8 ft ceiling | ACH, 9 ft ceiling | AHAM sizing |
|---|---|---|---|
| 100 sq ft | 19.9 | 17.7 | Meets AHAM 2/3 rule |
| 150 sq ft | 13.2 | 11.8 | Meets AHAM 2/3 rule |
| 200 sq ft | 9.9 | 8.8 | Meets AHAM 2/3 rule |
| 300 sq ft | 6.6 | 5.9 | Meets AHAM 2/3 rule |
| 400 sq ft | 5.0 | 4.4 | Below AHAM 2/3 rule |
| 500 sq ft | 4.0 | 3.5 | Below AHAM 2/3 rule |
| 700 sq ft | 2.8 | 2.5 | Below AHAM 2/3 rule |
AHAM's 2/3 rule: choose a smoke CADR of at least 2/3 of the room's area (8 ft ceiling). By that rule this model suits rooms up to about 398 sq ft.
Estimated yearly electricity cost
| Where | Residential rate | Per year | Per month |
|---|---|---|---|
| Louisiana | 12.72¢ | $34.60 | $2.88 |
| U.S. average | 18.31¢ | $49.81 | $4.15 |
| California | 33.61¢ | $91.43 | $7.62 |
| Hawaii | 48.00¢ | $130.57 | $10.88 |
Estimate = 272.02 kWh/yr × rate. Rates: EIA Table 5.6.A, July 2026 (preliminary). Filter replacement cost is not included (data gap: not in ENERGY STAR data). Use your own rate and hours.
Similar CADR from other brands
| Model | Smoke CADR (cfm) | ENERGY STAR room size (sq ft) | Energy use (kWh/yr) | Est. electricity/yr* |
|---|---|---|---|---|
| Blueair 3431101000 | 244 | 378 | 182 | $33.32 |
| Blueair 3332111100 | 283 | 439 | 193 | $35.34 |
| Coway AP-1526D (Airmega Halo) | 255 | 395 | 197 | $36.07 |
| Honeywell HPA6000B | 257 | 398 | 207 | $37.90 |
| Frigidaire FHAP2040A1 | 240 | 372 | 213 | $39.00 |
| Coway AP-1523D | 255 | 395 | 219 | $40.10 |
| Sharp KCP70UW | 255 | 395 | 225 | $41.20 |
| Levoit LAP-C401S-WUSR | 234 | 363 | 235 | $43.03 |
*Estimate: ENERGY STAR annual kWh × U.S. average residential rate 18.31¢/kWh (EIA, July 2026 (preliminary)). ENERGY STAR's annual figure assumes 16 hours/day of operation under the DOE test procedure.
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We have not tested this product. Figures are as listed in ENERGY STAR data retrieved 2026-10-17.