Model
Thermador T30IR900SP
Rank #354 means 353 of the 1,000 refrigerator models we track cost less to run each year; the 96th efficiency percentile means it uses less energy for its size than 96% of those models.
What does the Thermador T30IR900SP cost to run per year?
Among the 1,000 refrigerator models we track, the Thermador T30IR900SP sits in the below-average-cost group, rank #354, at roughly $54 a year. It uses 20% less energy than the U.S. federal standard model in its class, which would cost about $67/yr to run, a saving of roughly $13 a year. Size-adjusted, this model beats 96% of refrigerator models we track on efficiency, a standout even among the class's efficient models. This class has no published efficiency-factor figure beyond annual kWh itself, so at 16.8 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 Gaggenau RC472704 at $54/yr runs a little cheaper and the Lg LT11C2000* at $54/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 Thermador T30IR900SP's $54/yr adds up to roughly $648 in electricity alone, before purchase price or repairs.
Also sold as: Gaggenau RC472704.
By the numbers
The Thermador T30IR900SP 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 $54/yr, here is what the Thermador T30IR900SP 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 T30IR900SP costs about $540. That is roughly $130 less than a standard model in its class, which would run closer to $670 over the same ten years.
How the Thermador T30IR900SP compares
The refrigerator class we track runs from $8 to $149 a year. At $54/yr, it runs about $10 a year cheaper than the class median of $64, and it is about $46 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $67/yr, the Thermador T30IR900SP uses 20% less energy.
What drives its running cost
At 16.8 cu ft, the Thermador T30IR900SP 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, putting it squarely in the middle of the class on the size lever that drives most of the cost.
- 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 Thermador T30IR900SP cheap to run?
Yes. Its $54/yr running cost puts it at rank #354 of 1,000, below what most refrigerator models we track cost to run.
How much does the Thermador T30IR900SP cost per month?
About $4.47 a month, which is the $54 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: 289 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $54 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Thermador T30IR900SP for its size?
96th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 354 | Gaggenau RC47270416.8 cu ft | $54 |
| 353 | Farberware FW-UFR171-I3B17 cu ft | $53 |
| 352 | Black+Decker BUC1700XB17 cu ft | $53 |
| 351 | Commercial Cool CCUC1640GS16.4 cu ft | $53 |
| 350 | Beko BFBF2414WH11.4 cu ft | $53 |
Source
ES_0031649_T30IR900SP_05082017020339_70129737View certified refrigerator listingsENERGY STAR data as of July 2026Thermador and T30IR900SP 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.