Model
Marathon MFF208SSFD-2
Rank #706 means 705 of the 1,000 refrigerator models we track cost less to run each year; the 83rd efficiency percentile means it uses less energy for its size than 83% of those models.
What does the Marathon MFF208SSFD-2 cost to run per year?
At about $86 a year, the Marathon MFF208SSFD-2 costs more to run than most refrigerator models we track, rank #706 of 1,000. It uses 14% less energy than the U.S. federal standard model in its class, which would cost about $100/yr to run, a saving of roughly $14 a year. Size-adjusted, this model beats 83% of refrigerator models we track on efficiency, one of the stronger results in its class. This class has no published efficiency-factor figure beyond annual kWh itself, so at 20.3 cu ft (the class spans 1.2 to 31.7), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Kenmore KKFDR32.3X20-B at $86/yr runs a little cheaper and the Ge GIE19JSN**** at $86/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A refrigerator typically stays in service for somewhere around 12 years; over that span, the Marathon MFF208SSFD-2's $86/yr adds up to roughly $1032 in electricity alone, before purchase price or repairs.
By the numbers
The Marathon MFF208SSFD-2 normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $86/yr, here is what the Marathon MFF208SSFD-2 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Marathon MFF208SSFD-2 costs about $860. That is roughly $140 less than a standard model in its class, which would run closer to $1000 over the same ten years.
How the Marathon MFF208SSFD-2 compares
The refrigerator class we track runs from $8 to $149 a year. At $86/yr, it runs about $22 a year above the class median of $64, and it is about $78 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $100/yr, the Marathon MFF208SSFD-2 uses 14% less energy.
What drives its running cost
At 20.3 cu ft, the Marathon MFF208SSFD-2 is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, among refrigerator models, bigger capacity is the most common reason a running-cost figure lands on the high side, all else being equal.
- Interior volume. More cubic feet of cold air to maintain generally means a bigger compressor and a higher running-cost figure, even among efficient models.
- Counter depth vs standard depth. Standard-depth models generally offer more interior volume per unit of width than counter-depth models, a tradeoff between built-in looks and cubic feet.
- Compressor technology. How a compressor cycles, full on/off versus a variable-speed inverter design, is one of the biggest hidden differences behind two fridges with similar cubic feet but different running costs.
- Placement and ventilation. Ventilation clearance around the back and top matters more than most owners expect; a fridge starved of airflow runs its compressor longer to hold the same temperature.
Common questions
Is the Marathon MFF208SSFD-2 cheap to run?
Its $86/yr running cost, rank #706 of 1,000, is above what most refrigerator models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Marathon MFF208SSFD-2 cost per month?
About $7.13 a month, which is the $86 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 461 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $86 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Marathon MFF208SSFD-2 for its size?
83rd percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 705 | Kenmore KKFDR32.3X20-B17.9 cu ft | $86 |
| 704 | Dechef DCR18FS5M1617.9 cu ft | $86 |
| 703 | Iceblue LS-207BSSD20.7 cu ft | $85 |
| 702 | Greenline GLCHRFD18FFSS18.2 cu ft | $85 |
| 701 | Sub-Zero ID-30CI5 cu ft | $85 |
Source
ES_1137295_MFF208SSFD-2_071620250329588_9605149View certified refrigerator listingsENERGY STAR data as of July 2026Marathon and MFF208SSFD-2 are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.