Model
Marathon MUF80W
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 MUF80W cost to run per year?
Do the math and the Marathon MUF80W's $57/yr puts it at rank #146 of 622, on the cheaper side of the class. 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. Adjusted for size, it is only more efficient than 30% of freezer models we track, so part of its running cost comes from its capacity rather than efficiency alone. 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 Marathon MUF80BLS at $57/yr runs a little cheaper and the Arctic King AU83ETWBR1RCM at $59/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 MUF80W's $57/yr adds up to roughly $798 in electricity alone, before purchase price or repairs.
Also sold as: Marathon MUF80BLS.
By the numbers
The Marathon MUF80W 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 MUF80W 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 MUF80W 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 MUF80W 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 MUF80W uses 10% less energy.
What drives its running cost
At 7.5 cu ft, the Marathon MUF80W is a small freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 cu ft, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture.
- 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 MUF80W 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 MUF80W 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 MUF80W 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 |
|---|---|---|
| 145 | Marathon MUF80BLS7.5 cu ft | $57 |
| 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 |
Source
ES_1137295_MUF80W_061020241917913_2538815View certified freezer listingsENERGY STAR data as of July 2026Marathon and MUF80W 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.