Bosch Air 4000: CADR, room size and running cost
Smoke CADR 156 cfm · Room size 242 sq ft (ENERGY STAR) · 124 kWh/yr ≈ $22.70/yr electricity (estimate)
Certified specs
| Smoke CADR | 156 cfm |
|---|---|
| Dust CADR | 171 cfm |
| Pollen CADR | 182 cfm |
| PM2.5 CADR | 163 cfm |
| ENERGY STAR effective room size | 242 sq ft (1.55 × smoke CADR, per 10 CFR 429.68) |
| Annual energy use | 124 kWh/yr |
| Integrated energy factor | 7.7 cfm/W |
| Smoke CADR per watt | 7.36 cfm/W |
| Ozone emissions (reported) | 0 ppb |
| Technology | Fan and Filter |
| Filter types listed | HEPA-Type |
| Automatic mode | Air Quality Sensor,Timer |
| Connected (app/Wi-Fi) | No |
| ENERGY STAR Most Efficient | No |
| Markets | United States, Canada |
| Date certified | 2024-04-12 |
| ENERGY STAR partner | Bosch Thermotechnology Corporation |
| Source | ENERGY STAR record 4471345 · 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 | 11.7 | 10.4 | Meets AHAM 2/3 rule |
| 150 sq ft | 7.8 | 6.9 | Meets AHAM 2/3 rule |
| 200 sq ft | 5.8 | 5.2 | Meets AHAM 2/3 rule |
| 300 sq ft | 3.9 | 3.5 | Below AHAM 2/3 rule |
| 400 sq ft | 2.9 | 2.6 | Below AHAM 2/3 rule |
| 500 sq ft | 2.3 | 2.1 | Below AHAM 2/3 rule |
| 700 sq ft | 1.7 | 1.5 | 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 234 sq ft.
Estimated yearly electricity cost
| Where | Residential rate | Per year | Per month |
|---|---|---|---|
| Louisiana | 12.72¢ | $15.77 | $1.31 |
| U.S. average | 18.31¢ | $22.70 | $1.89 |
| California | 33.61¢ | $41.68 | $3.47 |
| Hawaii | 48.00¢ | $59.52 | $4.96 |
Estimate = 124 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 3132111100 | 153 | 237 | 103.3 | $18.91 |
| Blueair 3232111101 | 147 | 228 | 108 | $19.77 |
| Blueair 3232111100 | 145 | 225 | 110 | $20.14 |
| Blueair 4512311000 | 161 | 250 | 110 | $20.14 |
| Cuckoo CAC-AB0610FI | 149 | 231 | 126 | $23.07 |
| Midea 793K18A | 149 | 231 | 126 | $23.07 |
| Midea KJ200G-Z41 | 149 | 231 | 126 | $23.07 |
| Midea KJ250G-Z43 | 151 | 234 | 126 | $23.07 |
*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 Bosch models
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We have not tested this product. Figures are as listed in ENERGY STAR data retrieved 2026-10-17.