Alen BreatheSmart 35i vs Levoit LAP-C341S-WUSZ
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 Levoit LAP-C341S-WUSZ has the higher smoke CADR (161 vs 150 cfm, 7% more).
- Running cost: the Alen BreatheSmart 35i uses less electricity per ENERGY STAR (136 kWh/yr), about $1.65/yr less at the U.S. average rate (estimate).
- Room size: by AHAM's 2/3 rule, up to about 225 sq ft vs 242 sq ft.
Both sit in ENERGY STAR data as Medium rooms (150–249 cfm) units by smoke CADR. Listed differences: only the Alen BreatheSmart 35i is listed as connected (app/Wi-Fi); only the Alen BreatheSmart 35i lists an air-quality-sensor auto mode. Over 5 years at the U.S. average rate, the electricity difference is about $8.24 (estimate).
| Alen BreatheSmart 35i | Levoit LAP-C341S-WUSZ | |
|---|---|---|
| Smoke CADR (cfm) | 150 | 161 |
| Dust CADR (cfm) | 164 | 161 |
| Pollen CADR (cfm) | 195 | 172 |
| ENERGY STAR room size | 233 sq ft | 250 sq ft |
| AHAM 2/3-rule room size | 225 sq ft | 242 sq ft |
| Annual energy | 136 kWh | 145 kWh |
| Est. electricity/yr (U.S. avg) | $24.90 | $26.55 |
| Smoke CADR per watt | 6.47 | 6.68 |
| Ozone (reported) | 0 ppb | 0 ppb |
| Technology | Fan and Filter | Fan and Filter |
| Filters listed | HEPA-Type | HEPA |
| Auto mode | Air Quality Sensor | None |
| Connected | Yes | No |
| Most Efficient | No | No |
| Source | ENERGY STAR record 4481445 | ENERGY STAR record 4614674 |
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 Levoit air purifiers on the manufacturer's site (plain link, not an affiliate link)