STATE GCB-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).
If you are checking the STATE GCB-30R 4**, a gas tank water heater, it uses 185 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 0 therms from the class median of 185 therms, set across the 288 gas tank models tested at that draw pattern.
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
- 62 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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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 STATE model on file
What this brand files, by heater type.
UEF 0.6 · Grade F Price it on your ZIP
The 185 therms figure is computed by this site, not published by the registry. It starts from the model's UEF, the ratio of hot water delivered to energy used, which is 0.6. It then applies the DOE test's daily hot-water draw for the medium draw pattern. The underlying data comes from the DOE CCD, retrieved 2026-09-19. The figure therefore holds only at the test's daily draw. A household that draws more hot water each day would burn more natural gas than 185 therms, and one that draws less would burn less. The registry data does not show how far any single home differs from the test draw. The steps behind the figure are set out in how this site calculates annual energy and running cost.
Among the 288 gas tank models at the medium draw pattern, this one ranks 89th lowest in energy use. As the summary above shows, its use equals the class median, so it sits neither above nor below the middle of its class. DOE sets the medium pattern to represent a typical household's daily hot-water use. The model's rated volume is 29 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 62 gallons. A home that needs more than 62 gallons in its busiest hour would go past what that rating covers. To check a same-class alternative, look up a replacement by model number. To compare other gas tank sizes and fuels, use the water heater selector by fuel, space and size.
This text does not state a running cost for this model. That cost depends on the average residential gas price in the reader's state. The page calculates it from 185 therms and the rate that matches the reader's ZIP code, so no cost appears here. You can run the same calculation in the water heater cost calculator for your ZIP. No installed price range is published for this model either. Its ratings lie outside the range the cost database's model was fitted on. This site does not stretch that fitted model past its range. The installed price for this unit is therefore unknown, while its energy use of 185 therms at the medium draw pattern still comes from the registry's UEF of 0.6.
DOE CCD · 2026-09-19