Sub-Zero CL4250S/O
Not ENERGY STAR certified
Side-by-side refrigerator · 24.7 cu ft
Inthis refrigerator costs
about $11 a month
$137 a year
An estimate at your state's average rate — not a guarantee of your bill.
The yellow sticker says $107 a year.
You'll pay $31 more.
Sticker uses 14¢ per kWh. The U.S. average is 18.0¢ per kWh.
Energy use
762 kWh a year
vs similar side-by-side refrigerator
+13%
Cheaper refrigerators, same size
ENERGY STAR lists 2 other certified models at the same 762 kWh a year, size and type, so everything on this page applies to them too.
Cheaper to run, same size
- LG LS23NCP20Side-by-side refrigerator · 23.4 cu ft$89
- LG LS23C4000Side-by-side refrigerator · 23.1 cu ft$93
- Frigidaire FRSN2610ASide-by-side refrigerator · 26.4 cu ft$95
- Whirlpool WRS325FNA0Side-by-side refrigerator · 24.9 cu ft$103
A year at the U.S. average residential rate.
Cost in every state
762 kWh a year × each state's average residential rate (EIA 12-month average through July 2026).
| State | Rate | Per year | Per month |
|---|---|---|---|
| Hawaii | 43.7¢ | $333 | about $28 a month |
| California | 33.1¢ | $252 | about $21 a month |
| Massachusetts | 30.4¢ | $232 | about $19 a month |
| Rhode Island | 29.4¢ | $224 | about $19 a month |
| Maine | 29.3¢ | $223 | about $19 a month |
| New York | 28.4¢ | $216 | about $18 a month |
| Connecticut | 28.2¢ | $215 | about $18 a month |
| Alaska | 27.0¢ | $206 | about $17 a month |
| New Hampshire | 26.8¢ | $204 | about $17 a month |
| District of Columbia | 24.2¢ | $184 | about $15 a month |
Show all 52 statesShow fewer
| Vermont | 23.9¢ | $182 | about $15 a month |
|---|---|---|---|
| New Jersey | 23.6¢ | $180 | about $15 a month |
| Maryland | 22.3¢ | $170 | about $14 a month |
| Michigan | 21.0¢ | $160 | about $13 a month |
| Pennsylvania | 20.8¢ | $158 | about $13 a month |
| Illinois | 19.0¢ | $145 | about $12 a month |
| Wisconsin | 18.8¢ | $143 | about $12 a month |
| Ohio | 18.3¢ | $139 | about $12 a month |
| U.S. average | 18.0¢ | $137 | about $11 a month |
| Delaware | 18.0¢ | $137 | about $11 a month |
| Indiana | 17.1¢ | $130 | about $11 a month |
| Virginia | 16.6¢ | $126 | about $11 a month |
| Colorado | 16.6¢ | $126 | about $11 a month |
| Alabama | 16.5¢ | $126 | about $10 a month |
| Minnesota | 16.2¢ | $124 | about $10 a month |
| Texas | 16.0¢ | $122 | about $10 a month |
| South Carolina | 15.7¢ | $120 | about $10 a month |
| West Virginia | 15.7¢ | $119 | about $10 a month |
| Oregon | 15.6¢ | $119 | about $10 a month |
| Arizona | 15.5¢ | $118 | about $10 a month |
| Florida | 15.4¢ | $117 | about $10 a month |
| New Mexico | 15.2¢ | $116 | about $10 a month |
| Kansas | 15.1¢ | $115 | about $10 a month |
| Georgia | 15.1¢ | $115 | about $10 a month |
| Mississippi | 14.9¢ | $114 | about $9 a month |
| North Carolina | 14.9¢ | $113 | about $9 a month |
| South Dakota | 14.3¢ | $109 | about $9 a month |
| Washington | 14.2¢ | $108 | about $9 a month |
| Wyoming | 14.2¢ | $108 | about $9 a month |
| Iowa | 14.1¢ | $107 | about $9 a month |
| Kentucky | 14.0¢ | $107 | about $9 a month |
| Montana | 13.9¢ | $106 | about $9 a month |
| Missouri | 13.9¢ | $106 | about $9 a month |
| Tennessee | 13.7¢ | $104 | about $9 a month |
| Oklahoma | 13.6¢ | $104 | about $9 a month |
| Nevada | 13.6¢ | $103 | about $9 a month |
| Arkansas | 13.5¢ | $103 | about $9 a month |
| Utah | 13.3¢ | $101 | about $8 a month |
| Louisiana | 13.1¢ | $100 | about $8 a month |
| Nebraska | 12.9¢ | $98 | about $8 a month |
| Idaho | 12.7¢ | $97 | about $8 a month |
| North Dakota | 12.5¢ | $95 | about $8 a month |
What the Sub-Zero CL4250S/O costs where electricity is expensive
At Hawaii's average residential rate of 43.7¢ per kWh, the Sub-Zero CL4250S/O costs $333 a year — $226 more a year than the label says. The EnergyGuide label estimates $107 a year, because every label in the country is calculated at 14¢ per kWh. At the U.S. average of 18.0¢ per kWh this refrigerator costs $137 a year, and in North Dakota, the cheapest state, $95 a year.
| Where | Rate | Cost a year | vs the label |
|---|---|---|---|
| Hawaii | 43.7¢ per kWh | $333 | +$226 |
| California | 33.1¢ per kWh | $252 | +$146 |
| Massachusetts | 30.4¢ per kWh | $232 | +$125 |
| Rhode Island | 29.4¢ per kWh | $224 | +$117 |
| Maine | 29.3¢ per kWh | $223 | +$116 |
| North Dakota | 12.5¢ per kWh | $95 | −$11 |
Electricity prices: EIA 12-month average through July 2026, residential sector, average revenue per kWh. Label figure calculated at 14¢ per kWh, the rate the FTC requires on labels.
Full specs
At the U.S. average residential rate this one costs $137 a year — about 13% more expensive to run than the average side-by-side refrigerator ($121 a year across 380 certified models).
Every model on this scale is ENERGY STAR certified. Range across 380 side-by-side refrigerators, priced a year at the U.S. average residential rate.
- Brand
- Sub-Zero
- Model number
- CL4250S/O
- Type
- Side-by-side refrigerator
- Capacity
- 24.7 cu ft
- Annual energy use
- 762 kWh a year
- ENERGY STAR Most Efficient
- No
- Product class
- (4I-BI.) Built-In Refrigerator-freezers - automatic defrost with side-mounted freezer with an automatic icemaker without through-the-door ice service
- Adjusted volume (cu ft)
- 31.4
- EnergyGuide label
- https://haven.subzero.com/AssetLink/sbi232y136dhjv5m81865w4jd715h14v.pdf
Where to buy
We do not sell appliances. These open a search on the retailer's own site.
Common questions
+How much does the Sub-Zero CL4250S/O cost to run per month?
about $11 a month at the U.S. average residential rate of 18.0¢ per kWh, or $137 a year. Your cost depends on your state's rate — see the table above.
+How many kWh does the Sub-Zero CL4250S/O use?
762 kWh a year, as the manufacturer filed it with the U.S. Department of Energy, in its compliance certification database.
+Is the Sub-Zero CL4250S/O energy efficient?
It is not ENERGY STAR certified — it is filed with the U.S. Department of Energy, which every model on sale must be. It uses about 13% more electricity than the average side-by-side refrigerator (average: 673 kWh a year).
+How does the Sub-Zero CL4250S/O compare to the average refrigerator?
The average side-by-side refrigerator in our database uses 673 kWh a year, costing $121 a year at the U.S. average residential rate. The Sub-Zero CL4250S/O uses 762 kWh a year, costing $137 a year.
How we calculate this
Annual energy use (762 kWh a year) is the figure the manufacturer filed for this model with the U.S. Department of Energy, in the compliance certification database. Running cost is that figure multiplied by a state's average residential electricity price from the U.S. Energy Information Administration (12-month average through July 2026, average revenue per kWh).
Sources: U.S. DOE compliance certification data, updated fortnightly · U.S. EIA electricity prices, 12-month average through July 2026.