Model
Thermador T30IF900SP
Rank #502 means 501 of the 622 freezer models we track cost less to run each year; the 52nd efficiency percentile means it uses less energy for its size than 52% of those models.
What does the Thermador T30IF900SP cost to run per year?
The Thermador T30IF900SP costs about $92 a year to run, well up the cost table for its class at rank #502 of 622. It uses 22% less energy than the U.S. federal standard model in its class, which would cost about $115/yr to run, a saving of roughly $23 a year. Its size-adjusted efficiency percentile of 52 lands in the middle of the pack once capacity is accounted for. This class has no published efficiency-factor figure beyond annual kWh itself, so at 15.8 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 Tcl TFU21S3AHL-CA at $92/yr runs a little cheaper and the Truarctic TAUF2133SV at $92/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 Thermador T30IF900SP's $92/yr adds up to roughly $1288 in electricity alone, before purchase price or repairs.
Also sold as: Gaggenau RF471704.
By the numbers
The Thermador T30IF900SP 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 $92/yr, here is what the Thermador T30IF900SP adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Thermador T30IF900SP costs about $920. That is roughly $230 less than a standard model in its class, which would run closer to $1150 over the same ten years.
How the Thermador T30IF900SP compares
The freezer class we track runs from $25 to $120 a year. At $92/yr, it runs about $17 a year above the class median of $75, and it is about $67 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 Thermador T30IF900SP uses 22% less energy.
What drives its running cost
At 15.8 cu ft, the Thermador T30IF900SP 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 Thermador T30IF900SP cheap to run?
Its $92/yr running cost, rank #502 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 Thermador T30IF900SP cost per month?
About $7.63 a month, which is the $92 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: 493 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $92 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Thermador T30IF900SP for its size?
52nd 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
Source
ES_0031649_T30IF900SP_03082017044344_70122368View certified freezer listingsENERGY STAR data as of July 2026Thermador and T30IF900SP 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.