Rheem AM008277T
0.96 UEF DOE CCD · 2026-09-19Grade E: 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 Rheem AM008277T entry, it uses 615 kWh of electricity a year at the very small draw pattern, the standard daily hot-water usage DOE tests against. That equals the class median of 615 kWh, a difference of 0 kWh, across 271 registered electric tankless models.
Energy use per year
615 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 equal to the median of 615 kWh for the 271 models registered in the same heater type and draw pattern; it ranks 77 of 271, lowest energy first.
Solid line: this model (615 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
- 0.96 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
- 0.8 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,306–$1,838 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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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 Rheem model on file
What this brand files, by heater type.
UEF 0.96 · Grade E Price it on your ZIP
The figure of 615 kWh is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the very small draw pattern. This model's UEF is 0.96. The source data comes from the DOE CCD, retrieved 2026-09-19. Among the 271 electric tankless models at this draw pattern, it has the 77th lowest energy use of 271, which places it in the second-lowest quarter of its class. Its 615 kWh matches the class median of 615 kWh, a difference of 0 kWh. The calculation method is documented separately.
The registry lists a maximum flow rate in gallons per minute of 0.8 for this unit. The very small draw pattern covers small units, such as a single bathroom or a point-of-use heater under a sink. The 615 kWh figure belongs to that kind of use. A home with several fixtures running together is outside that pattern, so 615 kWh would not describe its use. This page has no energy figure for this model at any larger draw pattern; that value is not available. To look at other units by fuel, space and size, the water heater selector takes those inputs.
The running cost is not written in this text, because it depends on the electricity tariff the reader pays. Multiplying 615 kWh by your own rate per kilowatt-hour gives the annual cost at the test draw. The cost calculator for your ZIP does this with the local tariff. Actual use in a home differs from the test draw, so a bill can differ from that result. Because this model sits 0 kWh from the class median of 615 kWh, a same-class unit may sit above or below it; you can find a same-class replacement by model number to compare. The modeled installed-cost range is shown in its own block with its source and date and is not restated here.
DOE CCD · 2026-09-19