Model
Summit FFBF179SSIM
Rank #775 means 774 of the 1,000 refrigerator models we track cost less to run each year; the 44th efficiency percentile means it uses less energy for its size than 44% of those models.
What does the Summit FFBF179SSIM cost to run per year?
At roughly $100 a year to run, ranking #775 of 1,000, the Summit FFBF179SSIM costs more than the typical refrigerator model we track. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $109/yr to run, a saving of roughly $9 a year. Efficiency-wise, once size is accounted for, it sits right around the class median, ahead of 44% of the models we track. This class has no published efficiency-factor figure beyond annual kWh itself, so at 17.2 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 Liebherr MCB 3661 at $99/yr runs a little cheaper and the Fisher & Paykel RF170B***U** at $100/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 Summit FFBF179SSIM's $100/yr adds up to roughly $1200 in electricity alone, before purchase price or repairs.
By the numbers
The Summit FFBF179SSIM 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 $100/yr, here is what the Summit FFBF179SSIM adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Summit FFBF179SSIM costs about $1000. That is roughly $90 less than a standard model in its class, which would run closer to $1090 over the same ten years.
How the Summit FFBF179SSIM compares
The refrigerator class we track runs from $8 to $149 a year. At $100/yr, it runs about $36 a year above the class median of $64, and it is about $92 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $109/yr, the Summit FFBF179SSIM uses 10% less energy.
What drives its running cost
At 17.2 cu ft, the Summit FFBF179SSIM 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, right in the middle of the capacity range, so capacity is roughly a wash compared with the rest of the class.
- 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 Summit FFBF179SSIM cheap to run?
Its $100/yr running cost, rank #775 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 Summit FFBF179SSIM cost per month?
About $8.31 a month, which is the $100 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: 537 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $100 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Summit FFBF179SSIM for its size?
44th 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 |
|---|---|---|
| 774 | Liebherr MCB 366118.1 cu ft | $99 |
| 773 | Lg LF25S6000*25.1 cu ft | $99 |
| 772 | Fisher & Paykel RS36W(X)16.8 cu ft | $99 |
| 771 | Fisher & Paykel RF170A***J**17.3 cu ft | $99 |
| 770 | Miele KF 2911 SF19.6 cu ft | $99 |
Source
ES_92282_FFBF179SSIM_08152025023203_4254974View certified refrigerator listingsENERGY STAR data as of July 2026Summit and FFBF179SSIM 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.