Medify Air MA-40-V4.0: CADR, room size and running cost
Smoke CADR 245 cfm · Room size 380 sq ft (ENERGY STAR) · 261 kWh/yr ≈ $47.79/yr electricity (estimate)
Certified specs
| Smoke CADR | 245 cfm |
|---|---|
| Dust CADR | 257 cfm |
| Pollen CADR | 263 cfm |
| PM2.5 CADR | 250 cfm |
| ENERGY STAR effective room size | 380 sq ft (1.55 × smoke CADR, per 10 CFR 429.68) |
| Annual energy use | 261 kWh/yr |
| Integrated energy factor | 5.6 cfm/W |
| Smoke CADR per watt | 5.53 cfm/W |
| Ozone emissions (reported) | 0 ppb |
| Technology | Fan and Filter |
| Filter types listed | HEPA-Type |
| Automatic mode | Timer |
| Connected (app/Wi-Fi) | No |
| ENERGY STAR Most Efficient | No |
| Markets | United States, Canada |
| Date certified | 2025-08-26 |
| ENERGY STAR partner | MEDIFY AIR |
| Source | ENERGY STAR record 4497354 · 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 | 18.4 | 16.3 | Meets AHAM 2/3 rule |
| 150 sq ft | 12.2 | 10.9 | Meets AHAM 2/3 rule |
| 200 sq ft | 9.2 | 8.2 | Meets AHAM 2/3 rule |
| 300 sq ft | 6.1 | 5.4 | Meets AHAM 2/3 rule |
| 400 sq ft | 4.6 | 4.1 | Below AHAM 2/3 rule |
| 500 sq ft | 3.7 | 3.3 | Below AHAM 2/3 rule |
| 700 sq ft | 2.6 | 2.3 | 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 368 sq ft.
Estimated yearly electricity cost
| Where | Residential rate | Per year | Per month |
|---|---|---|---|
| Louisiana | 12.72¢ | $33.20 | $2.77 |
| U.S. average | 18.31¢ | $47.79 | $3.98 |
| California | 33.61¢ | $87.72 | $7.31 |
| Hawaii | 48.00¢ | $125.28 | $10.44 |
Estimate = 261 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 Ultra | 231 | 358 | 93 | $17.03 |
| Dreame CVF20B | 224 | 347 | 149 | $27.28 |
| Blueair 3431101000 | 244 | 378 | 182 | $33.32 |
| Honeywell HPA4300B | 229 | 355 | 185 | $33.87 |
| 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 |
*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 Medify Air models
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We have not tested this product. Figures are as listed in ENERGY STAR data retrieved 2026-10-17.