Stiebel Eltron Mini-E 6-2
0.98 UEF DOE CCD · 2026-09-19Grade D: 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 Mini-E 6-2, it uses 603 kWh of electricity a year at the federal test's daily hot-water draw. That figure belongs to the very small draw pattern, the standard daily hot-water usage DOE tests against. It sits 12 kWh below the 615 kWh median of the 271 electric tankless models in that class.
Energy use per year
603 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 below the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 10 of 271, lowest energy first.
Solid line: this model (603 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
- 0.98 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
- 0.6 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,311–$1,886 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 0.98 · Grade D Price it on your ZIP
The 603 kWh figure is computed by this site, not by the registry. It uses the registry's UEF, the ratio of hot water delivered to energy used. It also uses the DOE test's daily hot-water draw for the very small draw pattern. This unit's UEF is 0.98, from DOE CCD data retrieved 2026-09-19. Among the 271 electric tankless models at this draw pattern, it ranks 10th lowest for energy use. That places it in the lowest quarter of its class, 12 kWh a year below the median under the test condition. The data here does not show how your own household's use compares with the test draw. The figure therefore holds only at that draw. The page on how this site calculates annual energy and cost sets out each input.
The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. That is the use the 603 kWh figure describes. The registry lists this model's maximum flow rate in gallons per minute as 0.6. The data here does not say how many fixtures that flow can serve at once. It also gives no energy figure for this model at larger draw patterns, so that comparison is not available. A household expecting whole-home hot water falls outside the condition this figure covers. For that case, the water heater selector by fuel, space and size filters across other classes. To check a unit already on site, the same-class replacement search by model number starts from the model number on its label.
This page does not state a running cost in the text, because the cost depends on your own utility electricity tariff. The page computes that cost from your ZIP instead of an assumed rate. The input is the 603 kWh of electricity a year at the very small draw pattern. The 12 kWh gap to the class median follows the same rule: its value in money depends on your rate. The cost calculator on your own ZIP applies that rate to this model's figure. A modeled installed-cost range appears in its own block on this page, with its source and date. That range is not a quote, and this text does not restate its figures.
DOE CCD · 2026-09-19