Rheem SPEX65
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 SPEX65, it uses 615 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 equals the class median of 615 kWh and ranks 77th lowest of 271 comparable units.
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
- 0.7 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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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 Rheem model on file
What this brand files, by heater type.
UEF 0.96 · Grade E Price it on your ZIP
The 615 kWh figure is computed by this site. The registry does not publish it. 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. For the SPEX65, the UEF is 0.96. The inputs come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The figure applies only at that test draw. A household whose daily hot-water use differs from the test's will see a different total. The page on how the annual figure is calculated sets out each step. Against the 271 models registered as electric tankless units at this draw pattern, the SPEX65 sits at the class median of 615 kWh, a difference of 0 kWh.
The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The 615 kWh figure describes use at that scale only. The registry lists a maximum flow rate in gallons per minute of 0.7 for this model. That is the most hot water the unit delivers at one time under the test. A home that needs more than 0.7 at once is outside what this listing describes. Whether the unit covers a larger demand is not available in this data. If you are checking whether a different class fits better, the selector by fuel, space and size filters by those inputs. To match a unit already in place, use find a same-class replacement by model number.
The running cost is not stated here because it depends on your own utility's electricity tariff. The page multiplies 615 kWh by the rate for your area, using the cost calculator on your own ZIP. That result holds only at the test's daily draw for the very small draw pattern. Two readers with the same SPEX65 but different tariffs will see different running costs. The same annual energy figure is used in both cases. Because this model sits at the class median of 615 kWh, its running cost at a given rate will match that of a median unit in its class. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19