Model
Marathon MUF80BLS
Rank #146 means 145 of the 622 freezer models we track cost less to run each year; the 30th efficiency percentile means it uses less energy for its size than 30% of those models.
What does the Marathon MUF80BLS cost to run per year?
At $57 a year to run, the Marathon MUF80BLS runs cheaper than most models in its class, ranking #146 of 622 freezer models we track. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $63/yr to run, a saving of roughly $6 a year. Its 30th size-adjusted efficiency percentile is a step behind the class median, though not among the weakest results. At 7.5 cu ft, it is a small freezer for the class, which runs 1.1 to 23 cu ft; size and efficiency are the two levers behind the figure above, and this dataset does not carry a separate efficiency-factor column for this class.
Immediately around it on the leaderboard, the Blomberg BRUF2814WH at $57/yr runs a little cheaper and the Marathon MUF80W at $57/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A freezer typically stays in service for somewhere around 14 years; over that span, the Marathon MUF80BLS's $57/yr adds up to roughly $798 in electricity alone, before purchase price or repairs.
Also sold as: Marathon MUF80W.
By the numbers
The Marathon MUF80BLS 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 $57/yr, here is what the Marathon MUF80BLS 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 MUF80BLS costs about $570. That is roughly $60 less than a standard model in its class, which would run closer to $630 over the same ten years.
How the Marathon MUF80BLS compares
The freezer class we track runs from $25 to $120 a year. At $57/yr, it runs about $18 a year cheaper than the class median of $75, and it is about $32 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $63/yr, the Marathon MUF80BLS uses 10% less energy.
What drives its running cost
At 7.5 cu ft, the Marathon MUF80BLS is a small freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 cu ft, and smaller freezer models generally cost less to run for the same job, all else being equal.
- Interior volume. Cubic feet of frozen storage is the first lever behind a freezer's running cost, ahead of insulation or defrost type.
- Insulation and defrost type. Two freezers of the same size can differ meaningfully on running cost based on insulation quality and whether they run an automatic-defrost heater.
- Chest vs upright design. Chest freezers open from the top, so cold air, which sinks, stays inside when the lid opens; upright freezers lose more cold air per door opening for a similar capacity.
Common questions
Is the Marathon MUF80BLS cheap to run?
Yes, relatively. At $57 a year it ranks #146 of 622 freezer models we track, in the cheaper part of its class to run.
How much does the Marathon MUF80BLS cost per month?
Roughly $4.72/mo, spreading the $57/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 305 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $57 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Marathon MUF80BLS for its size?
30th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 144 | Blomberg BRUF2814WH14.3 cu ft | $57 |
| 143 | Beko BUFR2715WH14.3 cu ft | $57 |
| 142 | Beko BUFR2715MG14.3 cu ft | $57 |
| 141 | Liebherr UF5012.8 cu ft | $56 |
| 140 | Frigidaire FFUE0736AW7.2 cu ft | $56 |
Source
ES_1137295_MUF80BLS_061020241917591_8154539View certified freezer listingsENERGY STAR data as of July 2026Marathon and MUF80BLS 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.