AMERICAN STANDARD WATER HEATERS GN50T2-3-*
0.66 UEF DOE CCD · 2026-09-19Grade F: 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).
If you are checking this water heater's energy use, the figure is 256 therms of natural gas a year. That figure belongs to the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 4 therms below the class median of 260 therms.
Energy use per year
256 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 260 therms for the 414 models registered in the same heater type and draw pattern; it ranks 192 of 414, lowest energy first.
Solid line: this model (256 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
- 0.66 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
- 86 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 47 gal DOE CCD · 2026-09-19
What it costs to install
$1,892–$3,395 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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Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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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 50-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 0.66 · Grade F Price it on your ZIP
AMERICAN STANDARD WATER HEATERS GN50T2-3-* is a gas tank water heater. The registry lists its UEF, the ratio of hot water delivered to energy used, as 0.66. The registry does not state annual energy. This site computed it from that UEF and the DOE test's daily hot-water draw for the high draw pattern. The result is 256 therms of natural gas a year, retrieved from DOE CCD on 2026-09-19. The figure depends on the high draw pattern and does not apply to other patterns. Actual use in a home will differ wherever the household's hot-water draw differs from the test draw.
This model is compared with the 414 models registered as a gas tank at the high draw pattern. It has the 192nd lowest energy use of 414, which places it in the second-lowest quarter of its class. The class median is 260 therms a year. This unit is 4 therms below that median. The comparison uses the same fuel and draw pattern for every model, so it shows relative energy use only. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 86 gallons. The rated volume is 47 gallons.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The first hour rating of 86 gallons is the figure to compare with your own household's hot-water needs. A household with a different draw pattern should not read 256 therms as its own use. The figure applies only to the test draw. Running cost depends on your state's average residential gas price, and this page does not state it. Enter your ZIP in the cost calculator to apply your own rate to 256 therms. The methodology page explains how the annual cost is calculated. To compare by fuel, space or size, use the water heater selector.
DOE CCD · 2026-09-19