Stiebel Eltron Tempra 12
0.93 UEF DOE CCD · 2026-09-19Grade F: where this UEF sits among the 271 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tankless unit, very small draw pattern (small units - a single bathroom, or a point-of-use heater under a sink).
If you are checking the Stiebel Eltron Tempra 12, this is its yearly electricity use under the federal test. It uses 635 kWh a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That is 20 kWh above its class median of 615 kWh, ranking 218th lowest in energy use of 271.
Energy use per year
635 kWh a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the electricity rate where you live.
That is above the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 218 of 271, lowest energy first.
Solid line: this model (635 kWh). Dashed line: the class median.
Min 562 kWh Median 615 kWh Max 649 kWh
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 0.93 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tankless unit at the very small draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Very small DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 1.2 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,297–$1,766 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
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Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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How to size a tankless water heater by GPM
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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All electric tankless water heaters
Electric instantaneous units, sized by flow rate rather than tank gallons.
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Every Stiebel Eltron model on file
What this brand files, by heater type.
UEF 0.93 · Grade F Price it on your ZIP
This site computes the 635 kWh figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for this draw pattern. For this unit, the UEF is 0.93. The figure applies only at that test draw. The data does not cover use above or below it. The registry values come from DOE CCD, retrieved 2026-09-19. The page on how the annual figures and costs are calculated explains each step of this method.
The very small draw pattern covers small units, such as a heater for a single bathroom or a point-of-use heater under a sink. The 635 kWh figure describes that use and no other. The Tempra 12 is registered with a maximum flow rate in gallons per minute of 1.2. If you are checking a unit for a sink or a single bathroom, the figure matches the test conditions. For hot-water use larger than that pattern, this page has no energy figure, because the data does not include one. The rank of 218th places the unit in the highest quarter of its class for energy use.
The running cost does not appear in this text. It depends on your own utility's electricity tariff applied to the 635 kWh yearly use. The page works it out from your ZIP, and you can also use the running-cost calculator for your own ZIP. Your tariff also sets the cost of the 20 kWh gap above the class median, so that amount is not stated here. The installed price range appears in its own block with its source and date. That range is modeled and is not a quote. To look at other units among the 271 in this class, you can find a same-class replacement by model number.
DOE CCD · 2026-09-19