Alen BreatheSmart 75i_V2 vs AirDoctor AD4000
A spec-only comparison using ENERGY STAR certification data. We have not tested either unit, and features like noise, filter price and build quality are not covered here.
- Cleaning speed: the Alen BreatheSmart 75i_V2 has the higher smoke CADR (370 vs 370 cfm, 0% more).
- Running cost: the Alen BreatheSmart 75i_V2 uses less electricity per ENERGY STAR (304 kWh/yr), about $16.88/yr less at the U.S. average rate (estimate).
- Room size: by AHAM's 2/3 rule, up to about 555 sq ft vs 555 sq ft.
Both sit in ENERGY STAR data as Extra-large rooms (350+ cfm) units by smoke CADR. Listed differences: only the Alen BreatheSmart 75i_V2 is listed as connected (app/Wi-Fi); only the Alen BreatheSmart 75i_V2 lists an air-quality-sensor auto mode. Over 5 years at the U.S. average rate, the electricity difference is about $84.41 (estimate).
| Alen BreatheSmart 75i_V2 | AirDoctor AD4000 | |
|---|---|---|
| Smoke CADR (cfm) | 370 | 370 |
| Dust CADR (cfm) | 351 | 393 |
| Pollen CADR (cfm) | 431 | 450 |
| ENERGY STAR room size | 574 sq ft | 574 sq ft |
| AHAM 2/3-rule room size | 555 sq ft | 555 sq ft |
| Annual energy | 304 kWh | 396.2 kWh |
| Est. electricity/yr (U.S. avg) | $55.66 | $72.54 |
| Smoke CADR per watt | 7.12 | 5.49 |
| Ozone (reported) | 1 ppb | 1 ppb |
| Technology | Fan and Filter | — |
| Filters listed | HEPA-Type | HEPA-Type |
| Auto mode | Air Quality Sensor | None |
| Connected | Yes | No |
| Most Efficient | No | No |
| Source | ENERGY STAR record 4481131 | ENERGY STAR record 4518215 |
Purchase price and filter cost are not included (data gap). Electricity estimates use 18.31¢/kWh (EIA).
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See Alen air purifiers on the manufacturer's site (plain link, not an affiliate link)
See AirDoctor air purifiers on the manufacturer's site (plain link, not an affiliate link)