Model
Liebherr UF3651
Rank #2 means 1 of the 622 freezer models we track cost less to run each year; the 12th efficiency percentile means it uses less energy for its size than 12% of those models.
What does the Liebherr UF3651 cost to run per year?
The Liebherr UF3651 costs about $29 a year to run, a figure that only a handful of the 622 freezer models we track can beat, rank #2. It uses 61% less energy than the U.S. federal standard model in its class, which would cost about $74/yr to run, a saving of roughly $45 a year. Once capacity is factored in, its efficiency percentile of 12 is among the lowest in its class. At 2.5 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 Avanti CF24Q0W at $25/yr runs a little cheaper and the Epic ECF36W-1 at $31/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 Liebherr UF3651's $29/yr adds up to roughly $406 in electricity alone, before purchase price or repairs. At rank #2 of 622, it is one of the single cheapest freezer models we track to run, in the top one percent on cost.
By the numbers
The Liebherr UF3651 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 $29/yr, here is what the Liebherr UF3651 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Liebherr UF3651 costs about $290. That is roughly $450 less than a standard model in its class, which would run closer to $740 over the same ten years.
How the Liebherr UF3651 compares
The freezer class we track runs from $25 to $120 a year. At $29/yr, it runs about $46 a year cheaper than the class median of $75, and it is about $4 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $74/yr, the Liebherr UF3651 uses 61% less energy.
What drives its running cost
At 2.5 cu ft, the Liebherr UF3651 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 Liebherr UF3651 cheap to run?
Yes, relatively. At $29 a year it ranks #2 of 622 freezer models we track, in the cheaper part of its class to run.
How much does the Liebherr UF3651 cost per month?
Roughly $2.4/mo, spreading the $29/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 155 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $29 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Liebherr UF3651 for its size?
12th percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 1 | Avanti CF24Q0W2.5 cu ft | $25 |
Source
ES_1017655_UF3651_121920252119181_3703443View certified freezer listingsENERGY STAR data as of July 2026Liebherr and UF3651 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.