Model
Sub-Zero DEU2450R/*
Rank #36 means 35 of the 1,000 refrigerator models we track cost less to run each year; the 45th efficiency percentile means it uses less energy for its size than 45% of those models.
What does the Sub-Zero DEU2450R/* cost to run per year?
Out of the 1,000 refrigerator models we track, the Sub-Zero DEU2450R/* lands at rank #36 on cost, roughly $31 a year, a standout figure at the cheap end of the class. It uses 46% less energy than the U.S. federal standard model in its class, which would cost about $57/yr to run, a saving of roughly $26 a year. Capacity-normalized, it ranks ahead of 45% of refrigerator models we track, right in the class's middle band. Its listing marks it counter-depth, meaning it sits nearly flush with surrounding cabinets rather than protruding a few extra inches like a standard-depth model; that shallower body usually means less interior volume for the same footprint.
Immediately around it on the leaderboard, the Sks SKSCW181** at $30/yr runs a little cheaper and the Dometic C60G1 at $32/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 Sub-Zero DEU2450R/*'s $31/yr adds up to roughly $372 in electricity alone, before purchase price or repairs.
By the numbers
The Sub-Zero DEU2450R/* 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 $31/yr, here is what the Sub-Zero DEU2450R/* adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Sub-Zero DEU2450R/* costs about $310. That is roughly $260 less than a standard model in its class, which would run closer to $570 over the same ten years.
How the Sub-Zero DEU2450R/* compares
The refrigerator class we track runs from $8 to $149 a year. At $31/yr, it runs about $33 a year cheaper than the class median of $64, and it is about $23 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $57/yr, the Sub-Zero DEU2450R/* uses 46% less energy.
What drives its running cost
At 5.4 cu ft, the Sub-Zero DEU2450R/* is a mid-size refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, neither the size advantage of a small unit nor the size penalty of a large one applies here, so its running cost is a fairer test of efficiency alone.
- 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.
- 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.
- 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 Sub-Zero DEU2450R/* cheap to run?
Yes. Its $31/yr running cost puts it at rank #36 of 1,000, below what most refrigerator models we track cost to run.
How much does the Sub-Zero DEU2450R/* cost per month?
About $2.6 a month, which is the $31 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: 168 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $31 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Sub-Zero DEU2450R/* for its size?
45th 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 |
|---|---|---|
| 35 | Sks SKSCW181**9.7 cu ft | $30 |
| 34 | Zephyr PRPW24C01BG5.6 cu ft | $30 |
| 33 | Xo XOU24WGSL5.7 cu ft | $29 |
| 32 | Hisense HWS054N6SS5.4 cu ft | $29 |
| 31 | Frigidaire EFR115-C-RED-COM1.6 cu ft | $29 |
Source
ES_0031863_DEU2450R/*_11232020113945_80063754View certified refrigerator listingsENERGY STAR data as of July 2026Sub-Zero and DEU2450R/* 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.