Rainbow Brisk Box Ultra vs Coway Airmega 400
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 400 has the higher smoke CADR (376 vs 370 cfm, 2% more).
- Running cost: the Rainbow Brisk Box Ultra uses less electricity per ENERGY STAR (94 kWh/yr), about $49.80/yr less at the U.S. average rate (estimate).
- Room size: by AHAM's 2/3 rule, up to about 555 sq ft vs 564 sq ft.
Both sit in ENERGY STAR data as Extra-large rooms (350+ cfm) units by smoke CADR. Listed differences: only the Coway Airmega 400 lists an air-quality-sensor auto mode; only the Rainbow Brisk Box Ultra meets ENERGY STAR Most Efficient criteria. Over 5 years at the U.S. average rate, the electricity difference is about $249.02 (estimate).
| Rainbow Brisk Box Ultra | Coway Airmega 400 | |
|---|---|---|
| Smoke CADR (cfm) | 370 | 376 |
| Dust CADR (cfm) | 441 | 384 |
| Pollen CADR (cfm) | 450 | 409 |
| ENERGY STAR room size | 574 sq ft | 583 sq ft |
| AHAM 2/3-rule room size | 555 sq ft | 564 sq ft |
| Annual energy | 94 kWh | 366 kWh |
| Est. electricity/yr (U.S. avg) | $17.21 | $67.01 |
| Smoke CADR per watt | 23.27 | 6.02 |
| Ozone (reported) | 0 ppb | 0 ppb |
| Technology | Fan and Filter | Fan and Filter |
| Filters listed | HEPA | Composite Filter, Composite Filter |
| Auto mode | None | Air Quality Sensor |
| Connected | No | No |
| Most Efficient | Yes | No |
| Source | ENERGY STAR record 4518178 | ENERGY STAR record 4512744 |
Purchase price and filter cost are not included (data gap). Electricity estimates use 18.31¢/kWh (EIA).
Open this pair in the compare tool
See Rainbow air purifiers on the manufacturer's site (plain link, not an affiliate link)
See Coway air purifiers on the manufacturer's site (plain link, not an affiliate link)