AMERICAN STANDARD WATER HEATERS GN40T1-3-*
0.59 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 verifying this model's energy figure: AMERICAN STANDARD WATER HEATERS GN40T1-3-* uses 188 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 3 therms above the class median of 185 therms across the 288 gas tank models registered at this draw pattern.
Energy use per year
188 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 186 of 288, lowest energy first.
Solid line: this model (188 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
- 0.59 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
$1,351–$2,012 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
- Water Heating Technologies recalls American Standard gas water heaters 2016-05-24 Covers some units only: Models beginning GN and GSN sold May 2015 through February 2016; the firm lists exact serial numbers. Check the serial number on your rating plate.
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 AMERICAN STANDARD WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.59 · Grade G Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.59 for this model. This site computed the annual figure of 188 therms from that UEF and the DOE test's daily hot-water draw for the medium draw pattern. The registry does not publish the annual figure itself. The source is DOE CCD, retrieved 2026-09-19. Against the class median of 185 therms, this model is 3 therms higher. Its rank is 186th lowest energy use of 288, which puts it in the second-highest quarter of its class for energy use. The figure applies only to natural gas and the medium draw pattern. Values for other draw patterns are not available on this page.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 68 gallons, and the rated volume is 38 gallons. These values describe capacity and do not enter the annual figure of 188 therms. The model suits a household whose hot-water use resembles the medium draw pattern, a typical household on a busy morning. It suits less well a household that uses much more or much less hot water than the test draw, because 188 therms is a test-based figure, not a measurement of any home. A reader seeking energy use below the class median of 185 therms can try the water heater selector or find a same-class replacement by model number.
The running cost is not stated here because it depends on your state's average residential gas price. To check it by hand, multiply 188 therms by that price per therm, or enter your ZIP in the cost calculator, which does the same calculation for you. The steps are described in the annual cost methodology. The result covers natural gas at the medium draw pattern only, and a home with different hot-water use will differ from it. The modeled installed-cost range appears in its own block on this page with its source and date. It is a modeled range, not a quote, and it is not repeated here. This page holds no measured usage data for the AMERICAN STANDARD WATER HEATERS GN40T1-3-* in any specific home.
DOE CCD · 2026-09-19