A. O. SMITH GCRL-40 2**
0.58 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 288 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking this unit's figures, the A. O. SMITH GCRL-40 2** gas tank uses 191 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 6 therms above the class median of 185 therms and ranks 231st lowest of 288 models.
Energy use per year
191 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 above the median of 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 231 of 288, lowest energy first.
Solid line: this model (191 therms). Dashed line: the class median.
Min 148 therms Median 185 therms Max 194 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
- 0.58 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium 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
- 64 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
$1,293–$1,862 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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Answered from what models in this size actually file.
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Every model on file with the Department of Energy, by heater type.
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Gas-fired storage tanks, every size and draw pattern on file.
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Every A. O. SMITH model on file
What this brand files, by heater type.
UEF 0.58 · Grade G Price it on your ZIP
The figure of 191 therms is not a registry entry. This site computed it from the registry's UEF, 0.58, and the daily hot-water draw that the DOE test uses for the medium draw pattern. UEF, the ratio of hot water delivered to energy used, is the efficiency input here. The figure describes the test's draw and does not measure use in any particular home. The source is DOE CCD, retrieved 2026-09-19. The listing also gives a first hour rating, the gallons of hot water available in the first hour from a full tank. Its value is 64 gallons, with a rated volume of 38 gallons.
Against the 288 models registered as a gas tank at the medium draw pattern, this model uses 6 therms more than the class median of 185 therms a year. Its rank, 231st lowest energy use of 288, puts it in the highest quarter of its class for energy use. This suits a reader verifying a listing for a household that matches the medium draw pattern, since the figure applies at that pattern. It does not suit a reader whose household draws differently, because this data holds no figure for other patterns. Readers who need a different fuel, space or size can use the selector by fuel, space and size. The same-class replacement search by model number finds comparable units.
Running cost is not written on this page. It depends on your state's average residential gas price applied to 191 therms of natural gas at the medium draw pattern. The cost calculator on your own ZIP does that multiplication, and the method for the annual cost explains the inputs. The gap of 6 therms from the class median of 185 therms is a difference in therms. Converting it to cost needs your gas price, which this data does not contain. The modeled installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote, so it is not restated here. Measured use in your own home is not available in the registry data.
DOE CCD · 2026-09-19