Rheem SPEX80
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 this model, the Rheem SPEX80 uses 615 kWh of electricity a year. That figure is for the very small draw pattern, the standard daily hot-water usage DOE tests against. It equals its class median of 615 kWh, a difference of 0 kWh, and ranks 77th lowest of 271.
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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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 calculated 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. This model's UEF is 0.96. The source is the DOE Compliance Certification Database, retrieved 2026-09-19. The figure describes one test condition, not a measured household. A home that uses more hot water each day than the test assumes will use more electricity than 615 kWh. A home that uses less will use less. The page on how the annual cost is calculated explains the method step by step.
The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. This model's maximum flow rate in gallons per minute is 0.8. That rating limits how much hot water the unit can deliver at one time. A plumber or seller checking a point-of-use fit can compare the 0.8 rating with the flow the fixture needs. This model is compared with the 271 electric tankless models registered at this draw pattern. Its energy use equals the class median of 615 kWh. Its rank of 77th counts upward from the model with the lowest energy use. To look at other models, use the selector by fuel, space and size.
The 615 kWh figure applies only to the very small draw pattern. It does not describe a household that expects one unit to serve several bathrooms. For that use, the relevant comparison is a model tested at a larger draw pattern. The running cost is not given in this text because it depends on your own utility's electricity tariff. The page therefore calculates it from your ZIP instead of from a national figure. Enter your ZIP in the cost calculator on your own ZIP to see what 615 kWh a year costs at your rate. The installed price range appears in its own block on this page, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19