Sharp AirMac X7: CADR, room size and running cost
Smoke CADR 305 cfm · Room size 473 sq ft (ENERGY STAR) · 299 kWh/yr ≈ $54.75/yr electricity (estimate)
Certified specs
| Smoke CADR | 305 cfm |
|---|---|
| Dust CADR | 313 cfm |
| Pollen CADR | 332 cfm |
| PM2.5 CADR | 309 cfm |
| ENERGY STAR effective room size | 473 sq ft (1.55 × smoke CADR, per 10 CFR 429.68) |
| Annual energy use | 299 kWh/yr |
| Integrated energy factor | 6 cfm/W |
| Smoke CADR per watt | 5.98 cfm/W |
| Ozone emissions (reported) | 0 ppb |
| Technology | Fan and Filter |
| Filter types listed | HEPA-Type |
| Automatic mode | None |
| Connected (app/Wi-Fi) | No |
| ENERGY STAR Most Efficient | No |
| Markets | United States, Canada |
| Date certified | 2026-08-14 |
| ENERGY STAR partner | GD Midea Environment Appliances MFG Co., Ltd. |
| Other model numbers ENERGY STAR lists as equivalent | 143-0033-2; KJ500-L1A-SH; SAP4582SAW |
| Source | ENERGY STAR record 4690254 · 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 | 22.9 | 20.3 | Meets AHAM 2/3 rule |
| 150 sq ft | 15.2 | 13.6 | Meets AHAM 2/3 rule |
| 200 sq ft | 11.4 | 10.2 | Meets AHAM 2/3 rule |
| 300 sq ft | 7.6 | 6.8 | Meets AHAM 2/3 rule |
| 400 sq ft | 5.7 | 5.1 | Meets AHAM 2/3 rule |
| 500 sq ft | 4.6 | 4.1 | Below AHAM 2/3 rule |
| 700 sq ft | 3.3 | 2.9 | 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 458 sq ft.
Estimated yearly electricity cost
| Where | Residential rate | Per year | Per month |
|---|---|---|---|
| Louisiana | 12.72¢ | $38.03 | $3.17 |
| U.S. average | 18.31¢ | $54.75 | $4.56 |
| California | 33.61¢ | $100.49 | $8.37 |
| Hawaii | 48.00¢ | $143.52 | $11.96 |
Estimate = 299 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* |
|---|---|---|---|---|
| Rainbow Luggable XXL | 306 | 474 | 75 | $13.73 |
| Rainbow Luggable XL Ultra | 333 | 516 | 81 | $14.83 |
| Blueair 4412311000 | 321 | 498 | 181 | $33.14 |
| Blueair 3332111100 | 283 | 439 | 193 | $35.34 |
| Levoit LAP-C511S-WUS | 301 | 467 | 194 | $35.52 |
| Midea 793K20A | 303 | 470 | 218 | $39.92 |
| Midea US-KJ500G-TB32 | 303 | 470 | 218 | $39.92 |
| Blueair 3432111100 | 339 | 525 | 227 | $41.56 |
*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 Sharp models
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We have not tested this product. Figures are as listed in ENERGY STAR data retrieved 2026-10-17.