Levoit LAP-C311S-WUSR: CADR, room size and running cost
Smoke CADR 175 cfm · Room size 271 sq ft (ENERGY STAR) · 132 kWh/yr ≈ $24.17/yr electricity (estimate)
Certified specs
| Smoke CADR | 175 cfm |
|---|---|
| Dust CADR | 175 cfm |
| Pollen CADR | 200 cfm |
| PM2.5 CADR | 175 cfm |
| ENERGY STAR effective room size | 271 sq ft (1.55 × smoke CADR, per 10 CFR 429.68) |
| Annual energy use | 132 kWh/yr |
| Integrated energy factor | 7.7 cfm/W |
| Smoke CADR per watt | 7.81 cfm/W |
| Ozone emissions (reported) | 0 ppb |
| Technology | Fan and Filter |
| Filter types listed | HEPA |
| Automatic mode | None |
| Connected (app/Wi-Fi) | Yes (Wi-Fi) |
| ENERGY STAR Most Efficient | No |
| Markets | United States, Canada |
| Date certified | 2026-06-09 |
| ENERGY STAR partner | Vesync (US) Corporation |
| Other model numbers ENERGY STAR lists as equivalent | LAP- C311S-WCAR; LAP- C311S-XXXXX(where "X" may be blank, number from 0 to 9 or letter from A to Z) |
| Source | ENERGY STAR record 4639114 · 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 | 13.1 | 11.7 | Meets AHAM 2/3 rule |
| 150 sq ft | 8.8 | 7.8 | Meets AHAM 2/3 rule |
| 200 sq ft | 6.6 | 5.8 | Meets AHAM 2/3 rule |
| 300 sq ft | 4.4 | 3.9 | Below AHAM 2/3 rule |
| 400 sq ft | 3.3 | 2.9 | Below AHAM 2/3 rule |
| 500 sq ft | 2.6 | 2.3 | Below AHAM 2/3 rule |
| 700 sq ft | 1.9 | 1.7 | 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 262 sq ft.
Estimated yearly electricity cost
| Where | Residential rate | Per year | Per month |
|---|---|---|---|
| Louisiana | 12.72¢ | $16.79 | $1.40 |
| U.S. average | 18.31¢ | $24.17 | $2.01 |
| California | 33.61¢ | $44.37 | $3.70 |
| Hawaii | 48.00¢ | $63.36 | $5.28 |
Estimate = 132 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 4512311000 | 161 | 250 | 110 | $20.14 |
| Bosch Air 4000 | 156 | 242 | 124 | $22.70 |
| Dreo DR-HAP009 | 158 | 245 | 162 | $29.66 |
| Dreo DR-HAP009S | 158 | 245 | 162 | $29.66 |
| AirDoctor AD1500 | 170 | 264 | 166 | $30.39 |
| Coway AP-1125G | 185 | 287 | 195 | $35.70 |
*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.
Compare this model side by side with any other · All Levoit models
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We have not tested this product. Figures are as listed in ENERGY STAR data retrieved 2026-10-17.