Model
Monogram ZWE23NST****
Rank #856 means 855 of the 1,000 refrigerator models we track cost less to run each year; the 71st efficiency percentile means it uses less energy for its size than 71% of those models.
What does the Monogram ZWE23NST**** cost to run per year?
The Monogram ZWE23NST**** costs about $111 a year to run, well up the cost table for its class at rank #856 of 1,000. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $121/yr to run, a saving of roughly $10 a year. Capacity-normalized, it ranks ahead of 71% of refrigerator models we track, a reasonably strong result for the class. This class has no published efficiency-factor figure beyond annual kWh itself, so at 23.2 cu ft (the class spans 1.2 to 31.7), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Ge GWE23GYN**** at $111/yr runs a little cheaper and the Electrolux ERFG2393A* at $111/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 Monogram ZWE23NST****'s $111/yr adds up to roughly $1332 in electricity alone, before purchase price or repairs.
Also sold as: Cafe CWE23SP*M***.
By the numbers
The Monogram ZWE23NST**** 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 $111/yr, here is what the Monogram ZWE23NST**** adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Monogram ZWE23NST**** costs about $1110. That is roughly $100 less than a standard model in its class, which would run closer to $1210 over the same ten years.
How the Monogram ZWE23NST**** compares
The refrigerator class we track runs from $8 to $149 a year. At $111/yr, it runs about $47 a year above the class median of $64, and it is about $103 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $121/yr, the Monogram ZWE23NST**** uses 10% less energy.
What drives its running cost
At 23.2 cu ft, the Monogram ZWE23NST**** is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, size is usually the single biggest lever behind a running-cost figure, and at this end of the range there is more capacity to service, which tends to push the number up.
- 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.
- 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.
- 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 Monogram ZWE23NST**** cheap to run?
Its $111/yr running cost, rank #856 of 1,000, is above what most refrigerator models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Monogram ZWE23NST**** cost per month?
About $9.22 a month, which is the $111 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: 596 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $111 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Monogram ZWE23NST**** for its size?
71st percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 857 | Ge GWE23GYN****23.2 cu ft | $111 |
| 856 | Cafe CWE23SP*M***23.2 cu ft | $111 |
| 855 | Beko BFSB3612XSS20.2 cu ft | $110 |
| 854 | Truarctic TRFD2336HSS22.4 cu ft | $110 |
| 853 | Koolmore KM-RER36-SWPR19.8 cu ft | $110 |
Source
ES_1123206_ZWE23NST****_09092022014848_80141277View certified refrigerator listingsENERGY STAR data as of July 2026Monogram and ZWE23NST**** 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.