Model
Thermador T24IF905SP
Rank #357 means 356 of the 622 freezer models we track cost less to run each year; the 36th efficiency percentile means it uses less energy for its size than 36% of those models.
What does the Thermador T24IF905SP cost to run per year?
The Thermador T24IF905SP costs about $81 a year to run, a fairly typical figure for the class; it ranks #357 of 622. It uses 23% less energy than the U.S. federal standard model in its class, which would cost about $103/yr to run, a saving of roughly $22 a year. Efficiency-wise, once size is accounted for, it trails most of the class, ahead of only 36% of the models we track. This class has no published efficiency-factor figure beyond annual kWh itself, so at 12.2 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 Professional Series® PS-UFR171 at $81/yr runs a little cheaper and the Upstreman UF17-# at $81/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 T24IF905SP's $81/yr adds up to roughly $1134 in electricity alone, before purchase price or repairs.
Also sold as: Gaggenau RF461705.
By the numbers
The Thermador T24IF905SP 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 $81/yr, here is what the Thermador T24IF905SP 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 T24IF905SP costs about $810. That is roughly $220 less than a standard model in its class, which would run closer to $1030 over the same ten years.
How the Thermador T24IF905SP compares
The freezer class we track runs from $25 to $120 a year. At $81/yr, it runs about $6 a year above the class median of $75, and it is about $56 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $103/yr, the Thermador T24IF905SP uses 23% less energy.
What drives its running cost
At 12.2 cu ft, the Thermador T24IF905SP 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 T24IF905SP cheap to run?
Roughly, yes. Its $81/yr figure is close to the class median, ranking #357 of 622, neither a bargain nor a splurge on running cost.
How much does the Thermador T24IF905SP cost per month?
About $6.73 a month, which is the $81 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: 435 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $81 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Thermador T24IF905SP for its size?
36th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 358 | Professional Series® PS-UFR17117 cu ft | $81 |
| 357 | Gaggenau RF46170512.2 cu ft | $81 |
| 356 | Farberware FW-UFR171-I3B17 cu ft | $81 |
| 355 | Element EUF17CEEW17 cu ft | $81 |
| 354 | Element EUF17CEES17 cu ft | $81 |
Source
ES_0031649_T24IF905SP_08312020054816_80044911View certified freezer listingsENERGY STAR data as of July 2026Thermador and T24IF905SP 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.