RELIANCE WATER HEATERS GCBL-30R 4**
0.6 UEF DOE CCD · 2026-09-19Grade F: 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).
You are checking this unit's energy use. The RELIANCE WATER HEATERS GCBL-30R 4** uses 185 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That equals the class median of 185 therms, a difference of 0 therms, among 288 gas tank models.
Energy use per year
185 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 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 89 of 288, lowest energy first.
Solid line: this model (185 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
- 0.6 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
- 65 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 29 gal DOE CCD · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's rated tank size lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety 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 30-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 0.6 · Grade F Price it on your ZIP
The figure of 185 therms is not a registry value. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.6 for this model, and from the DOE test's daily hot-water draw for the medium draw pattern. That draw pattern describes a typical three- or four-person household on a busy morning. The source is the DOE CCD, retrieved 2026-09-19. The comparison group is the 288 models registered as a gas tank at this draw pattern. Their median is 185 therms, so this model's difference from the median is 0 therms. Its rank is 89th lowest energy use of 288, which places it in the second-lowest quarter of its class.
The figure suits a reader whose household matches the medium draw pattern and who wants to check a listing against the registry. This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 65 gallons, and a rated volume of 29 gallons. Both come from the model's registry entry. The figure does not describe a household that uses more or less hot water than the test draw, because energy use at other draw patterns is not available on this page. The registry also does not state how much hot water a given household needs in its busiest hour. To compare by fuel, space and size, use the water heater selector. To look up a same-class replacement, use the replacement finder by model number.
Running cost is not given as text here, because it depends on the state average residential gas price for the reader's ZIP. The calculation applies that price to 185 therms of natural gas, so a different rate gives a different result for the same model. The cost calculator uses your own ZIP, and the methodology page explains how the annual cost is calculated. An installed price range is not published for this model. Its ratings lie outside the range the cost database's model was fitted on, and the range is not extended beyond it. The figure of 185 therms holds only for natural gas at the medium draw pattern.
DOE CCD · 2026-09-19