AMERICAN STANDARD WATER HEATERS GN50L2-3-*
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).
If you are checking this unit's figures, the AMERICAN STANDARD WATER HEATERS GN50L2-3-* gas tank uses 260 therms of natural gas a year. That is at the high draw pattern, the standard daily hot-water usage DOE tests against, meant for a larger household. That equals the class median of 260 therms, 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
- 78 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 48 gal DOE CCD · 2026-09-19
What it costs to install
$1,849–$3,282 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 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 0.65 · Grade G Price it on your ZIP
The figure of 260 therms of natural gas is computed by this site, not by the registry. It starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.65. The DOE test's daily hot-water draw for the high draw pattern is then applied. The source is DOE CCD, retrieved 2026-09-19. Among the 414 models registered as a gas tank at the high draw pattern, this unit ranks 204th lowest in energy use. That is in the second-lowest quarter of its class. The class median is 260 therms, so the difference is 0 therms. The steps of the calculation are set out in how the annual cost is calculated.
The unit has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 78 gallons. Its rated volume is 48 gallons. The figure of 260 therms applies to households that match the high draw pattern, and to no other use. For a different draw pattern, the energy use is not available here and is not estimated. The gap of 0 therms from the class median of 260 therms describes energy use at the test's draw only, not delivery capacity. To compare other fuels, spaces or sizes, use the selector by fuel, space and size.
The running cost is not stated in the text, because it depends on the state average residential gas price for the reader's location. Multiplying 260 therms by that price gives the yearly gas cost at the high draw pattern, and the cost calculator on your own ZIP does this from the ZIP you enter. Because this unit is level with the class median of 260 therms, its running cost would match a median model of the class at the same rate. To look for a model in the same class by model number, use find a same-class replacement. The modeled installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19