Model
Marathon MFF182SS
Rank #535 means 534 of the 1,000 refrigerator models we track cost less to run each year; the 92nd efficiency percentile means it uses less energy for its size than 92% of those models.
What does the Marathon MFF182SS cost to run per year?
Among the 1,000 refrigerator models we track, the Marathon MFF182SS's $66/yr running cost ranks it #535, close to dead center. It uses 13% less energy than the U.S. federal standard model in its class, which would cost about $76/yr to run, a saving of roughly $10 a year. Its size-adjusted efficiency percentile of 92 sits well above the class median, a clearly above-average efficiency result. This class has no published efficiency-factor figure beyond annual kWh itself, so at 18.3 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 Viking Range,Llc FDREIC7360R at $66/yr runs a little cheaper and the Crosley XRE18GGA**** at $67/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 MFF182SS's $66/yr adds up to roughly $792 in electricity alone, before purchase price or repairs.
By the numbers
The Marathon MFF182SS 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 $66/yr, here is what the Marathon MFF182SS 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 MFF182SS costs about $660. That is roughly $100 less than a standard model in its class, which would run closer to $760 over the same ten years.
How the Marathon MFF182SS compares
The refrigerator class we track runs from $8 to $149 a year. At $66/yr, it runs about $2 a year above the class median of $64, and it is about $58 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $76/yr, the Marathon MFF182SS uses 13% less energy.
What drives its running cost
At 18.3 cu ft, the Marathon MFF182SS is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, and larger refrigerator models generally cost more to run than smaller ones in the same class, simply because there is more to keep cold, spin, heat, or light.
- 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 MFF182SS cheap to run?
Roughly, yes. Its $66/yr figure is close to the class median, ranking #535 of 1,000, neither a bargain nor a splurge on running cost.
How much does the Marathon MFF182SS cost per month?
About $5.54 a month, which is the $66 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: 358 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $66 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Marathon MFF182SS for its size?
92nd percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 534 | Viking Range,Llc FDREIC7360R21.9 cu ft | $66 |
| 533 | Summit LBF30173W16.1 cu ft | $66 |
| 532 | Fhiaba S360FR3DU21.9 cu ft | $66 |
| 531 | Beko BFBF30116SS16.1 cu ft | $66 |
| 530 | Whirlpool WRB551WNBS11.3 cu ft | $66 |
Source
ES_1137295_MFF182SS_12032019061127_3487275View certified refrigerator listingsENERGY STAR data as of July 2026Marathon and MFF182SS 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.