STATE GUF-40 1**
0.65 UEF DOE CCD · 2026-09-19Grade D: 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 the STATE GUF-40 1**, this gas tank uses 171 therms of natural gas a year. That figure is for the medium draw pattern, the standard daily hot-water usage DOE tests against. It is 14 therms below the 185 therms median of the 288 gas tank models registered at that pattern.
Energy use per year
171 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 below the median of 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 33 of 288, lowest energy first.
Solid line: this model (171 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
- 0.65 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
- 68 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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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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Gas-fired storage tanks, every size and draw pattern on file.
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Every STATE model on file
What this brand files, by heater type.
UEF 0.65 · Grade D Price it on your ZIP
This site computed the 171 therms figure; the registry does not publish it. The calculation starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.65 for this model. It then applies the DOE test's daily hot-water draw for the medium pattern. The input data come from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure holds only at the federal test's draw. A household that uses more hot water than the medium pattern assumes will use more gas than 171 therms, and one that uses less will use less. The registry data do not show how far any real household differs from the test draw. The steps are described in how the annual cost is calculated.
Among the 288 gas tank models at the medium draw pattern, this model ranks 33rd lowest for energy use. Its gap of 14 therms below the 185 therms median applies only within that class and at that draw. The unit has a rated volume of 38 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 68 gallons. Together with the medium pattern, these figures describe the household the test assumes. A home that needs more than 68 gallons in its busiest hour falls outside that assumption. For that home, the medium-pattern rank and median gap do not apply. To compare models by fuel, space and size, use the water heater selector.
This text does not give a running cost because it depends on your state's average residential gas price. The page works it out from your ZIP by applying that rate to 171 therms of natural gas a year. Two readers checking the GUF-40 1** in different states will see different costs for the same gas use. The 14 therms gap to the class median also becomes a cost difference only at your own rate. To see the cost at your rate, enter your ZIP in the water heater cost calculator. The modeled installed-cost range appears in its own block, with its source and date, and is not a quote. To find another model in the same class, use the replacement search by model number.
DOE CCD · 2026-09-19