Stiebel Eltron DHC 3-1
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 DHC 3-1, this electric tankless unit uses 635 kWh of electricity a year. That figure applies to the very small draw pattern, the standard daily hot-water usage DOE tests against. It is 20 kWh above the 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
- 0.3 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
The 635 kWh figure is calculated by this site; 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 the very small draw pattern. This model's UEF is 0.93, from the DOE CCD, retrieved 2026-09-19. The figure is valid only at that test draw. A household that uses more hot water each day will use more electricity than the figure shown. Energy use at other daily draws is not available on this page. The full method is explained on the page about how the annual cost is calculated.
The very small draw pattern covers small units that serve a single bathroom, or a point-of-use heater under a sink. The registry lists this model's maximum flow rate in gallons per minute as 0.3. The registry data does not show whether it could serve more than that kind of small point of use. There are 271 models registered as electric tankless units at the very small draw pattern. This model ranks 218th lowest in energy use among them. That puts it in the highest quarter of its class for energy use. If you are checking a like-for-like swap, you can find a same-class replacement by model number.
The running cost is not given in this text because it depends on your own utility's electricity tariff. Instead, the page calculates it from your ZIP, using the 635 kWh figure. At any single tariff, the 20 kWh gap between this model and the class median of 615 kWh leads to a cost gap in the same direction. The size of that gap in money depends on your rate, so this text does not estimate it. To see it, enter your ZIP in the cost calculator for your own ZIP. The installed price appears in its own block as a modeled range, not a quote.
DOE CCD · 2026-09-19