Model
Fhiaba S300FZ3IU
Rank #590 means 589 of the 622 freezer 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 Fhiaba S300FZ3IU cost to run per year?
Among the 622 freezer models we track, the Fhiaba S300FZ3IU's $105/yr running cost ranks it #590, in the pricier fifth of the class. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $115/yr to run, a saving of roughly $10 a year. Capacity-normalized, it ranks ahead of just 37% of freezer models we track, a soft spot worth weighing against the dollar figure. This class has no published efficiency-factor figure beyond annual kWh itself, so at 16 cu ft (the class spans 1.1 to 23), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Gaggenau RF471701 at $105/yr runs a little cheaper and the Fhiaba S300FZ6IU at $105/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A freezer typically stays in service for somewhere around 14 years; over that span, the Fhiaba S300FZ3IU's $105/yr adds up to roughly $1470 in electricity alone, before purchase price or repairs.
Also sold as: Fhiaba S300FZ6IU, Viking Range,Llc FDFZIC7300L, Viking Range,Llc FDFZIC7300R.
By the numbers
The Fhiaba S300FZ3IU 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 $105/yr, here is what the Fhiaba S300FZ3IU adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Fhiaba S300FZ3IU costs about $1050. That is roughly $100 less than a standard model in its class, which would run closer to $1150 over the same ten years.
How the Fhiaba S300FZ3IU compares
The freezer class we track runs from $25 to $120 a year. At $105/yr, it runs about $30 a year above the class median of $75, and it is about $80 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $115/yr, the Fhiaba S300FZ3IU uses 10% less energy.
What drives its running cost
At 16 cu ft, the Fhiaba S300FZ3IU is a mid-size freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 cu ft, putting it squarely in the middle of the class on the size lever that drives most of the cost.
- Interior volume. As with refrigerators, more cubic feet of frozen storage generally means a bigger compressor and a higher annual energy figure.
- Insulation and defrost type. Better-insulated cabinets lose less cold to the surrounding room, and frost-free (automatic-defrost) freezers run a periodic heating element that a manual-defrost model does not.
- Chest vs upright design. Door orientation affects how much cold air escapes per opening: top-opening chest designs generally hold cold better than front-opening upright ones.
Common questions
Is the Fhiaba S300FZ3IU cheap to run?
Its $105/yr running cost, rank #590 of 622, is above what most freezer models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Fhiaba S300FZ3IU cost per month?
About $8.75 a month, which is the $105 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: 566 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $105 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Fhiaba S300FZ3IU 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_1148036_S300FZ3IU_032520261303633_6286296View certified freezer listingsENERGY STAR data as of July 2026Fhiaba and S300FZ3IU 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.