Model
Monogram ZIR360NN****
Rank #566 means 565 of the 1,000 refrigerator models we track cost less to run each year; the 97th efficiency percentile means it uses less energy for its size than 97% of those models.
What does the Monogram ZIR360NN**** cost to run per year?
At about $68 a year, the Monogram ZIR360NN**** lands in the middle third of refrigerator models we track on running cost, rank #566 of 1,000. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $75/yr to run, a saving of roughly $7 a year. Few refrigerator models we track are more efficient for their size than this one; its size-adjusted efficiency percentile of 97 is near the top of the class. This class has no published efficiency-factor figure beyond annual kWh itself, so at 22 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 Summit LRF182SSIM at $67/yr runs a little cheaper and the Samsung RT18M62*3** at $68/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 ZIR360NN****'s $68/yr adds up to roughly $816 in electricity alone, before purchase price or repairs.
By the numbers
The Monogram ZIR360NN**** 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 $68/yr, here is what the Monogram ZIR360NN**** 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 ZIR360NN**** costs about $680. That is roughly $70 less than a standard model in its class, which would run closer to $750 over the same ten years.
How the Monogram ZIR360NN**** compares
The refrigerator class we track runs from $8 to $149 a year. At $68/yr, it runs about $4 a year above the class median of $64, and it is about $60 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $75/yr, the Monogram ZIR360NN**** uses 10% less energy.
What drives its running cost
At 22 cu ft, the Monogram ZIR360NN**** is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, and larger refrigerator models generally cost more to run than smaller ones in the same class, simply because there is more to keep cold, spin, heat, or light.
- 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 ZIR360NN**** cheap to run?
Roughly, yes. Its $68/yr figure is close to the class median, ranking #566 of 1,000, neither a bargain nor a splurge on running cost.
How much does the Monogram ZIR360NN**** cost per month?
About $5.63 a month, which is the $68 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: 364 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $68 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Monogram ZIR360NN**** for its size?
97th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 565 | Summit LRF182SSIM18 cu ft | $67 |
| 564 | Summit FF18W18 cu ft | $67 |
| 563 | Hisense HRT180N6A*E18 cu ft | $67 |
| 562 | Elisii DERTM181WW418 cu ft | $67 |
| 561 | Elisii DERTM180SW218 cu ft | $67 |
Source
ES_1123206_ZIR360NN****_11062019063005_80024070View certified refrigerator listingsENERGY STAR data as of July 2026Monogram and ZIR360NN**** 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.