Room Air Conditioners
Brothers102399
ENERGY STAR certified · Aug 2026 · Most Efficient
- Annual energy use
- 531.9 kWh/yr
- Cooling capacity
- 10000 BTU/h
- Combined energy efficiency ratio
- 14.1 BTU/Wh
- Below federal standard
- 47 %
Running cost calculator
Where your state sits among all 51
Cost to run a room air conditioner in every state
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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 51 ENERGY STAR certified through the wall models with a similar cooling capacity (7500 to 12500 BTU/h), this one ranks 10th lowest in annual energy use.
- Median of these models
- 532 kWh/yr
- This model vs the median
- 0%
- Uses less than
- 45% 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 |
|---|---|---|
| Midea MWEUTW-08CRFN8-BCN1 | 426 | 426 kWh |
| Seasons ST08VB1 | 426 | 426 kWh |
| Midea MAT08R1FWTK | 426 | 426 kWh |
| Midea MAT08R1SWTK | 426 | 426 kWh |
| Brothers 102378 | 426 | 426 kWh |
Yearly cost by state
Same 531.900 kWh/yr at each state’s average residential price (2026-07).
Comparable models
Same type, within 25% of this model’s cooling capacity.
Specifications
- Annual energy use
- 531.9 kWh/yrENERGY STAR estimated annual energy use, typical use (DOE test procedure)
- Cooling capacity
- 10000 BTU/hRated cooling capacity
- Combined energy efficiency ratio
- 14.1 BTU/WhCombined Energy Efficiency Ratio
- Below federal standard
- 47 %As published by ENERGY STAR
- Type
- Through the Wall
- Product class
- 8a. Without reverse cycle, without louvered sides, and 8,000 to 10,999 Btu/h
- Installation
- Does Not Straddle Window or Windowsill
- Heating mode
- No
- Variable-speed compressor
- Yes
- Voltage
- 230 V
- Height
- 14.7 in
- Width
- 24.1 in
- Depth
- 20.9 in
- Weight
- 56.2 lb
- Refrigerant
- R-32
- Refrigerant and GWP
- R-32 (GWP:675 | Lower GWP)
- Connected
- No
- Markets
- United States, Canada
- Available on market
- 2026-08-03
- ENERGY STAR ID
- 4682197
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Frequently asked questions
How much electricity does the Brothers 102399 use?
ENERGY STAR lists 531.9 kWh per year under typical test conditions, which is calculated with U.S. Department of Energy test procedures for a typical cooling season. Your use will differ with the climate, how many hours a day you cool and the temperature you set.
How much does it cost to run?
At statewide average residential prices, the listed annual use costs about $67.66 in Louisiana and $255.31 in Hawaii (EIA, 2026-07). Your own utility rate may be different; enter it in the calculator.
How does the Brothers 102399 compare with similar models?
Among 51 ENERGY STAR certified through the wall models with a similar cooling capacity, it ranks 10th lowest in annual energy use. Its 531.9 kWh per year is the same as the median of 531.9 kWh.
What does the CEER number mean?
The combined energy efficiency ratio is the cooling output in BTU for each watt-hour of electricity used. This model is listed at 14.1 BTU/Wh. A higher number means more cooling for the same electricity.
Learn more
Methodology and sources
Model data comes from the ENERGY STAR Certified Room Air Conditioners 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.