Air Purifiers
RainbowBrisk Box Ultra
ENERGY STAR certified · Dec 2025 · Most Efficient
- Annual energy use
- 94 kWh/yr
- Room size
- 574 sq ft
- Integrated energy factor
- 25.2 CFM/W
Running cost calculator
Where your state sits among all 51
Cost to run a air purifier in every state
Replacing an old air purifier with this one? Savings calculator
How this is calculated
- Annual energy use is the figure ENERGY STAR lists for this model under typical test conditions. It is not measured in your home.
- Yearly cost = annual kWh × your rate. Monthly cost is the yearly cost divided by 12, a flat average. Five-year cost keeps the rate constant; prices will change.
- Statewide averages are not your utility’s tariff. Use your bill’s rate for a closer number.
- We do not estimate watts or hourly cost: the source data does not include them.
How it compares
Among 66 ENERGY STAR certified fan and filter models with a similar room size (401.8 to 746.2 sq ft), this one ranks 3rd lowest in annual energy use.
- Median of these models
- 298 kWh/yr
- This model vs the median
- -68%
- Uses less than
- 95% of them
Compared with every comparable model on the ENERGY STAR list, not only the ones published on this site. Same type, similar size.
Same type and size, lower energy use
| Model | kWh/yr | Difference |
|---|---|---|
| Rainbow Luggable XXL | 75 | 75 kWh |
| Rainbow Luggable XL Ultra | 81 | 81 kWh |
Yearly cost by state
Same 94 kWh/yr at each state’s average residential price (2026-07).
Comparable models
Same type, within 30% of this model’s room size.
Specifications
- Annual energy use
- 94 kWh/yrENERGY STAR estimated annual energy use, typical use
- Room size
- 574 sq ftRoom size from the clean air delivery rate
- Integrated energy factor
- 25.2 CFM/WIntegrated Energy Factor
- Technology
- Fan and Filter
- Fine particle (PM2.5) CADR
- 404.0 CFM
- Dust CADR
- 441.0 CFM
- Smoke CADR
- 370.0 CFM
- Pollen CADR
- 450.0 CFM
- Ozone emissions
- 0.00 ppb
- Filter
- HEPA
- Automatic mode
- None
- Connected
- No
- Connects using
- None
- Markets
- United States, Canada
- Available on market
- 2025-11-07
- ENERGY STAR ID
- 4518178
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Frequently asked questions
How much electricity does the Rainbow Brisk Box Ultra use?
ENERGY STAR lists 94 kWh per year under typical test conditions, as published by ENERGY STAR. Your use will differ with how many hours a day you run it and at which fan speed.
How much does it cost to run?
At statewide average residential prices, the listed annual use costs about $11.96 in Louisiana and $45.12 in Hawaii (EIA, 2026-07). Your own utility rate may be different; enter it in the calculator.
How does the Rainbow Brisk Box Ultra compare with similar models?
Among 66 ENERGY STAR certified fan and filter models with a similar room size, it ranks 3rd lowest in annual energy use. Its 94 kWh per year is 68% below the median of 297.5 kWh.
What room size is it rated for?
ENERGY STAR lists this model for rooms up to 574 sq ft. The figure comes from the clean air delivery rate, so a smaller room cleans the air faster than a room at the limit.
What does the integrated energy factor mean?
It is the clean air delivered per watt of power, in cubic feet per minute per watt. This model is listed at 25.2 CFM/W. A higher number means more clean air for the same electricity.
Learn more
Methodology and sources
Model data comes from the ENERGY STAR Certified Air Purifiers dataset (EPA). Electricity prices are statewide average residential prices from the U.S. EIA, latest period July 2026. Values are stored locally and refreshed by scheduled imports. Missing values are left blank, never estimated.