Coway Airmega 300 vs Levoit LAP-C511S-WUS
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 Coway Airmega 300 has the higher smoke CADR (315 vs 301 cfm, 5% more).
- Running cost: the Levoit LAP-C511S-WUS uses less electricity per ENERGY STAR (194 kWh/yr), about $21.97/yr less at the U.S. average rate (estimate).
- Room size: by AHAM's 2/3 rule, up to about 472 sq ft vs 452 sq ft.
Both sit in ENERGY STAR data as Large rooms (250–349 cfm) units by smoke CADR. Listed differences: only the Levoit LAP-C511S-WUS is listed as connected (app/Wi-Fi); only the Levoit LAP-C511S-WUS meets ENERGY STAR Most Efficient criteria. Over 5 years at the U.S. average rate, the electricity difference is about $109.86 (estimate).
| Coway Airmega 300 | Levoit LAP-C511S-WUS | |
|---|---|---|
| Smoke CADR (cfm) | 315 | 301 |
| Dust CADR (cfm) | 333 | 298 |
| Pollen CADR (cfm) | 360 | 319 |
| ENERGY STAR room size | 488 sq ft | 467 sq ft |
| AHAM 2/3-rule room size | 472 sq ft | 452 sq ft |
| Annual energy | 314 kWh | 194 kWh |
| Est. electricity/yr (U.S. avg) | $57.49 | $35.52 |
| Smoke CADR per watt | 5.86 | 9.26 |
| Ozone (reported) | 0 ppb | 0 ppb |
| Technology | Fan and Filter | Fan and Filter |
| Filters listed | Composite Filter, Composite Filter | HEPA-Type |
| Auto mode | None | None |
| Connected | No | Yes |
| Most Efficient | No | Yes |
| Source | ENERGY STAR record 4512747 | ENERGY STAR record 4682774 |
Purchase price and filter cost are not included (data gap). Electricity estimates use 18.31¢/kWh (EIA).
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See Coway 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)