Model
Thermador T24ID900RP
Rank #432 means 431 of the 622 freezer models we track cost less to run each year; the 30th efficiency percentile means it uses less energy for its size than 30% of those models.
What does the Thermador T24ID900RP cost to run per year?
The Thermador T24ID900RP costs about $85 a year to run, more than most of the 622 freezer models we track; it ranks #432. It uses 17% less energy than the U.S. federal standard model in its class, which would cost about $100/yr to run, a saving of roughly $15 a year. Capacity-normalized, it ranks ahead of just 30% 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 11.2 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 Thermador T24ID900LP at $85/yr runs a little cheaper and the Jenn-Air ALOVE18FLC0* at $85/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 T24ID900RP's $85/yr adds up to roughly $1190 in electricity alone, before purchase price or repairs.
Also sold as: Gaggenau RF463704.
By the numbers
The Thermador T24ID900RP 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 $85/yr, here is what the Thermador T24ID900RP 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 T24ID900RP costs about $850. That is roughly $150 less than a standard model in its class, which would run closer to $1000 over the same ten years.
How the Thermador T24ID900RP compares
The freezer class we track runs from $25 to $120 a year. At $85/yr, it runs about $10 a year above the class median of $75, and it is about $60 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $100/yr, the Thermador T24ID900RP uses 17% less energy.
What drives its running cost
At 11.2 cu ft, the Thermador T24ID900RP is a mid-size freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 cu ft, neither the size advantage of a small unit nor the size penalty of a large one applies here, so its running cost is a fairer test of efficiency alone.
- 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 T24ID900RP cheap to run?
Its $85/yr running cost, rank #432 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 T24ID900RP cost per month?
About $7.07 a month, which is the $85 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: 457 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $85 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Thermador T24ID900RP for its size?
30th 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 |
|---|---|---|
| 437 | Thermador T24ID900LP11.2 cu ft | $85 |
| 436 | Miele F 2671 Vi11.2 cu ft | $85 |
| 435 | Miele F 2671 SF11.2 cu ft | $85 |
| 434 | Miele F 2661 Vi11.2 cu ft | $85 |
| 433 | Gaggenau RF46370511.2 cu ft | $85 |
Source
ES_0031649_T24ID900RP_03082017044344_70122368View certified freezer listingsENERGY STAR data as of July 2026Thermador and T24ID900RP 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.