Refrigerators
MicroFridge3.1MF7RS
ENERGY STAR certified · Jan 2018 · Most Efficient
- Annual energy use
- 195 kWh/yr
- Adjusted volume
- 3.8 ft³
- Total volume
- 3.1 ft³
- Below federal standard
- 46 %
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Cost to run a refrigerator 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 695 ENERGY STAR certified compact refrigerator models with a similar adjusted volume (3 to 4.6 ft³), this one ranks 8th lowest in annual energy use.
- Median of these models
- 228 kWh/yr
- This model vs the median
- -14%
- Uses less than
- 98% 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 |
|---|---|---|
| Liebherr UR3650 | 125 | 125 kWh |
| Liebherr URP3653 | 125 | 125 kWh |
| Fisher & Paykel RB36S | 150 | 150 kWh |
| Miele Dreams Cool M | 180 | 180 kWh |
| Sub-Zero DEU1550B*/* | 183 | 183 kWh |
Yearly cost by state
Same 195 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
- 195 kWh/yrENERGY STAR estimated annual energy use, typical conditions (DOE test procedure)
- Adjusted volume
- 3.8 ft³Adjusted volume used for the federal standards
- Total volume
- 3.1 ft³Total interior volume
- Below federal standard
- 46 %As published by ENERGY STAR
- Type
- Compact Refrigerator
- Product class
- 12 - Compact Refrigerator-Freezer - partial automatic defrost
- Defrost
- Automatic
- Compact
- Yes
- Built-in
- No
- Ice maker
- No
- Through-the-door dispenser
- No
- Counter depth
- No
- Height
- 32.9 in
- Width
- 18.5 in
- Connected
- No
- UPC
- 67638008785
- Markets
- United States, Canada
- Available on market
- 2018-01-22
- ENERGY STAR ID
- 2315167
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Frequently asked questions
How much electricity does the MicroFridge 3.1MF7RS use?
ENERGY STAR lists 195 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 $24.80 in Nevada and $92.00 in Hawaii (EIA, 2026-08). Your own utility rate may be different; enter it in the calculator.
How does the MicroFridge 3.1MF7RS compare with similar models?
Among 695 ENERGY STAR certified compact refrigerator models with a similar adjusted volume, it ranks 8th lowest in annual energy use. Its 195 kWh per year is 14% below the median of 228 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 3.8 ft³ adjusted volume and 3.1 ft³ total volume.
How does it compare with the federal standard?
ENERGY STAR lists this model as using 46% 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.