Model
Sub-Zero DEU2450B*/ADA/*
Rank #126 means 125 of the 1,000 refrigerator models we track cost less to run each year; the 37th efficiency percentile means it uses less energy for its size than 37% of those models.
What does the Sub-Zero DEU2450B*/ADA/* cost to run per year?
At $40 a year to run, the Sub-Zero DEU2450B*/ADA/* is among the cheapest refrigerator models we track, ranking #126 of 1,000. It uses 30% less energy than the U.S. federal standard model in its class, which would cost about $57/yr to run, a saving of roughly $17 a year. Once capacity is factored in, its efficiency percentile of 37 is below the class median, worth weighing alongside the raw dollar figure. It is a counter-depth model, built shallower to sit flush with kitchen cabinets, a design choice that typically trades away some interior volume (and so some running-cost headroom) for the built-in look.
Immediately around it on the leaderboard, the Magic Chef MCBR265WE at $40/yr runs a little cheaper and the Frestec FTC31R at $40/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 DEU2450B*/ADA/*'s $40/yr adds up to roughly $480 in electricity alone, before purchase price or repairs.
By the numbers
The Sub-Zero DEU2450B*/ADA/* 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 $40/yr, here is what the Sub-Zero DEU2450B*/ADA/* 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 DEU2450B*/ADA/* costs about $400. That is roughly $170 less than a standard model in its class, which would run closer to $570 over the same ten years.
How the Sub-Zero DEU2450B*/ADA/* compares
The refrigerator class we track runs from $8 to $149 a year. At $40/yr, it runs about $24 a year cheaper than the class median of $64, and it is about $32 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 DEU2450B*/ADA/* uses 30% less energy.
What drives its running cost
At 5.1 cu ft, the Sub-Zero DEU2450B*/ADA/* is a small refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, and smaller refrigerator models generally cost less to run for the same job, all else being equal.
- Counter depth vs standard depth. Counter-depth models sit flush with cabinets but usually hold less interior volume than a standard-depth model of the same width, which can nudge the per-cubic-foot running cost either way.
- Interior volume. Cubic feet of interior volume is the first thing that scales a fridge's running cost up or down, before compressor quality even enters the picture.
- Compressor technology. Newer variable-speed (inverter) compressors modulate output instead of cycling fully on and off, which tends to use less energy for the same cooling job than an older fixed-speed compressor.
- Placement and ventilation. A fridge pushed tight against a wall or cabinet, or standing next to an oven or in direct sun, works harder to shed the heat its compressor produces, which can push real-world cost above the published figure.
Common questions
Is the Sub-Zero DEU2450B*/ADA/* cheap to run?
Yes, relatively. At $40 a year it ranks #126 of 1,000 refrigerator models we track, in the cheaper part of its class to run.
How much does the Sub-Zero DEU2450B*/ADA/* cost per month?
Roughly $3.33/mo, spreading the $40/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 215 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $40 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Sub-Zero DEU2450B*/ADA/* for its size?
37th 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
Source
ES_0031863_DEU2450B*/ADA/*_04222021074331_80078990View certified refrigerator listingsENERGY STAR data as of July 2026Sub-Zero and DEU2450B*/ADA/* 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.