A. O. SMITH GCR-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 A. O. SMITH GCR-30R 4**, a gas tank water heater, this site calculates 185 therms of natural gas a year. That figure belongs to the medium draw pattern, the standard daily hot-water usage DOE tests against. It sits 0 therms from its class median of 185 therms, so it equals that median.
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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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 A. O. SMITH model on file
What this brand files, by heater type.
UEF 0.6 · Grade F Price it on your ZIP
This site calculated the 185 therms figure; the registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium draw pattern. The UEF of this model is 0.6. The inputs come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The figure holds only at the test's daily draw. This page does not know how much hot water your household actually uses. If your use differs from the test's draw, your gas use will not match 185 therms. The steps are set out in how the annual cost is calculated.
The class for this model is the 288 models registered as a gas tank at the medium draw pattern. This model ranks 89th lowest in energy use among them. That places it in the second-lowest quarter of its class. Its 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. These ratings describe a household whose daily use matches the medium draw pattern. If a home needs more than 62 gallons in its busiest hour, its demand is outside this rating. To compare other models in the same class, use find a same-class replacement by model number.
This text does not state a running cost for the GCR-30R 4**. The running cost depends on your state's average residential natural gas price. The page therefore computes it from your ZIP and the 185 therms figure. To see the result for your own rate, enter your ZIP in the cost calculator on your own ZIP. An installed price range is not available for this model. Its ratings lie outside the range that the cost database's model was fitted on. This site does not extend that range to cover them, so it gives no installed price estimate for the GCR-30R 4**.
DOE CCD · 2026-09-19