Rheem PROG30S-30N RH63
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).
Checking the Rheem PROG30S-30N RH63? It 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
- 51 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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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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Gas-fired storage tanks, every size and draw pattern on file.
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Every Rheem model on file
What this brand files, by heater type.
UEF 0.6 · Grade F Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.6 for this model. This site combined that value with the daily hot-water draw of the medium draw pattern to reach 185 therms. The registry does not publish an annual energy figure itself. The source is DOE CCD, retrieved 2026-09-19. The figure holds only for that test draw and for natural gas. Real household use depends on hot-water habits, inlet water temperature and tank location, and this page has no data to say by how much it would differ. The steps behind the calculation are set out in how the annual cost is calculated.
Among the 288 gas tank models registered at the medium draw pattern, this unit ranks 89th lowest in energy use. That places it in the second-lowest quarter of its class. Its 185 therms matches the class median of 185 therms, so the difference is 0 therms. The unit therefore suits a reader who wants consumption in line with the class at this draw pattern. It suits less a reader who needs the lowest energy use, since 89th of 288 leaves lower-use models ahead of it. Capacity is a separate check: the first hour rating, the gallons of hot water available in the first hour from a full tank, is 51, with a rated volume of 29 gallons. A household whose busiest hour draws more than 51 gallons should compare that against its own use, or find a same-class replacement by model number.
The running cost is not stated in this text, because it depends on your state's average residential gas price. The cost calculator on your own ZIP applies that price to 185 therms, and the result holds only for the medium draw pattern. A household with a different draw will see a different result, and that difference is unknown here. An installed price range is not published for this model. Its ratings, a UEF of 0.6 and a first hour rating of 51, lie outside the range the cost database's model was fitted on, and the range is not stretched past it. To compare other units by fuel, space and size, use the water heater selector.
DOE CCD · 2026-09-19