Rheem XG40T12HE40U0
0.65 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 414 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tank, high draw pattern (a larger household, or one where showers and laundry overlap).
You are checking the Rheem XG40T12HE40U0, a gas tank water heater. It uses 260 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That equals the class median of 260 therms across 414 gas tank models at that pattern, a difference of 0 therms.
Energy use per year
260 therms 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 natural gas rate where you live.
That is equal to the median of 260 therms for the 414 models registered in the same heater type and draw pattern; it ranks 204 of 414, lowest energy first.
Solid line: this model (260 therms). Dashed line: the class median.
Min 188 therms Median 260 therms Max 277 therms
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
- 0.65 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tank at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 84 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 38 gal DOE CCD · 2026-09-19
What it costs to install
$1,702–$2,914 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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Is a 40-gallon water heater enough?
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 gas tank water heaters
Gas-fired storage tanks, every size and draw pattern on file.
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Every Rheem model on file
What this brand files, by heater type.
UEF 0.65 · Grade G Price it on your ZIP
This site calculated the 260 therms figure; the registry does not list it. It combines two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.65 for this model. The second is the DOE test's daily hot-water draw for the high draw pattern. The source is the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. Among the 414 gas tank models at the high draw pattern, this model ranks 204th lowest in energy use. That places it in the second-lowest quarter of its class. The conversion steps are set out in how the annual cost is calculated.
The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 260 therms figure holds only at that pattern's daily draw. The registry also lists a first hour rating, the gallons of hot water available in the first hour from a full tank. For this model it is 84 gallons, with a rated volume of 38 gallons. If your home draws less hot water each day than the test assumes, this figure does not describe your use. A value at a lower draw is not available on this page. To compare other sizes or fuels, use the water heater selector by fuel, space and size.
The running cost for the Rheem XG40T12HE40U0 is not stated in this text. It depends on your state's average residential natural gas price. For that reason the page computes it from your ZIP. It starts from the 260 therms used at the high draw pattern. You can run that calculation in the cost calculator on your own ZIP. The result applies to your rate only and is not a figure the registry publishes. The installed price range appears in its own block as a modeled range, not a quote. To check which models share this class with the 204th ranked unit, find a same-class replacement by model number.
DOE CCD · 2026-09-19