Refrigerators
BekoBFFD3644ESS
ENERGY STAR certified · Nov 2025 · Most Efficient
- Annual energy use
- 553 kWh/yr
- Adjusted volume
- 27.2 ft³
- Total volume
- 21.8 ft³
- Below federal standard
- 27 %
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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 814 ENERGY STAR certified bottom freezer models with a similar adjusted volume (21.8 to 32.6 ft³), this one ranks 259th lowest in annual energy use.
- Median of these models
- 584 kWh/yr
- This model vs the median
- -5%
- Uses less than
- 66% 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 |
|---|---|---|
| Fisher & Paykel RF178WRNX1 | 372 | 372 kWh |
| Fisher & Paykel RF178ANX1 | 412 | 412 kWh |
| Marathon MFF179WBM-RH | 438 | 438 kWh |
| Marathon MFF179SSBM-RH | 438 | 438 kWh |
| Marathon MFF179WBM-LH | 438 | 438 kWh |
Yearly cost by state
Same 553 kWh/yr at each state’s average residential price (2026-08).
Comparable models
Same type, within 20% of this model’s adjusted volume.
Specifications
- Annual energy use
- 553 kWh/yrENERGY STAR estimated annual energy use, typical conditions (DOE test procedure)
- Adjusted volume
- 27.2 ft³Adjusted volume used for the federal standards
- Total volume
- 21.8 ft³Total interior volume
- Below federal standard
- 27 %As published by ENERGY STAR
- Type
- Bottom Freezer
- Product class
- 5A - Refrigerator-freezers - automatic defrost with bottom-mounted freezer with through-the-door ice service
- Defrost
- Automatic
- Compact
- No
- Built-in
- No
- Ice maker
- Yes
- Through-the-door dispenser
- Yes
- Counter depth
- No
- Height
- 70 in
- Width
- 36 in
- Refrigerant
- R-600a
- Refrigerant and GWP
- R-600a (GWP:3 | Lower GWP)
- Connected
- No
- Markets
- United States, Canada
- Available on market
- 2025-11-17
- ENERGY STAR ID
- 4514582
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Frequently asked questions
How much electricity does the Beko BFFD3644ESS use?
ENERGY STAR lists 553 kWh per year under typical test conditions, which is calculated with U.S. Department of Energy test procedures. Your use will differ with how often the door is opened, the room temperature and how full the refrigerator is kept.
How much does it cost to run?
At statewide average residential prices, the listed annual use costs about $70.34 in Nevada and $260.91 in Hawaii (EIA, 2026-08). Your own utility rate may be different; enter it in the calculator.
How does the Beko BFFD3644ESS compare with similar models?
Among 814 ENERGY STAR certified bottom freezer models with a similar adjusted volume, it ranks 259th lowest in annual energy use. Its 553 kWh per year is 5% below the median of 584 kWh.
What does adjusted volume mean?
ENERGY STAR's adjusted volume counts the freezer compartment more heavily than the fresh-food compartment, because freezers need more energy per cubic foot. It is the size measure behind the federal energy standards. This model lists 27.2 ft³ adjusted volume and 21.8 ft³ total volume.
How does it compare with the federal standard?
ENERGY STAR lists this model as using 27% less energy than the federal standard for its product class. That percentage is published by ENERGY STAR and is not recalculated here.
Learn more
Methodology and sources
Model data comes from the ENERGY STAR Certified Refrigerators dataset (EPA). Electricity prices are statewide average residential prices from the U.S. EIA, latest period August 2026. Values are stored locally and refreshed by scheduled imports. Missing values are left blank, never estimated.