RELIANCE WATER HEATERS GCFL-50 1**
0.69 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 the RELIANCE WATER HEATERS GCFL-50 1**, a gas tank water heater, this is its yearly energy use. It uses 245 therms of natural gas a year under the high draw pattern, the standard daily hot-water usage DOE tests against. That is 15 therms below the median of 260 therms for its class.
Energy use per year
245 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 130 of 414, lowest energy first.
Solid line: this model (245 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
- 0.69 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
- 49 gal DOE CCD · 2026-09-19
What it costs to install
$2,097–$3,919 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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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 RELIANCE WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.69 · Grade F Price it on your ZIP
The 245 therms figure is calculated by this site. The registry does not publish it. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high draw pattern. This model's UEF is 0.69. The high pattern represents a larger household, or one where showers and laundry overlap. The UEF comes from the DOE Compliance Certification Database, retrieved 2026-09-19. If your household uses more or less hot water than the test assumes, your yearly gas use will be different from 245 therms. The registry does not say how large that difference would be, so this page cannot give it. The steps behind the figure are explained in how the annual energy and cost figures are calculated.
This model is compared with the 414 models registered as a gas tank at the high draw pattern. Among them, it ranks 130th for lowest energy use, which puts it in the second-lowest quarter of the class. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 78 gallons. Its rated volume is 49 gallons. All of these figures apply to a household that matches the high draw pattern. They do not describe a smaller household, and this page has no figures for other draw patterns. Other models in the class use less energy than this one, and you can compare them with the selector by fuel, space and size. If you are matching an existing unit, you can find a same-class replacement by model number.
The text on this page gives no running cost. What 245 therms of natural gas costs each year depends on your state's average residential gas price. The page calculates that cost from your ZIP code and shows it in a separate block. No cost is estimated here. How much the 15 therms gap to the class median is worth also depends on your gas rate. The installed-price range also appears in a separate block, with its source and date. It is a modeled range, not a quote. To see this model's running cost at your own rate, use the cost calculator for your ZIP code.
DOE CCD · 2026-09-19