Rheem PROP G50-50* RH HE EC3
0.88 UEF DOE CCD · 2026-09-19Grade A: 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 Rheem PROP G50-50* RH HE EC3, a gas tank water heater, it uses 192 therms of natural gas a year. That figure applies to the high draw pattern, the standard daily hot-water usage DOE tests against. It is 68 therms below the median of 260 therms for its class.
Energy use per year
192 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 21 of 414, lowest energy first.
Solid line: this model (192 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
- 0.88 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
- 95 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 50 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2022-11-07 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- No ENERGY STAR · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's UEF 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 · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
- Vent type and size (ENERGY STAR)
- how a gas unit is vented, the vent's diameter and the height of its vent connector
What 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 Rheem model on file
What this brand files, by heater type.
UEF 0.88 · Grade A Price it on your ZIP
This site calculated the 192 therms figure. The registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high draw pattern. This unit's UEF is 0.88. Both inputs come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The figure describes the federal test's daily usage, not usage in a particular home. A household that uses less hot water than the test assumes will use less gas, and one that uses more will use more. The data does not say how large that gap would be in any given home. The page on how the annual figures are calculated sets out each step.
The comparison class is the 414 models registered as a gas tank at the high draw pattern. By energy use, this model ranks 21st lowest of 414, which puts it in the lowest quarter of its class. At the same test draw, it uses 68 therms less than the class median of 260 therms. The high draw pattern represents a larger household, or one where showers and laundry overlap. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 95 gallons, and its rated volume is 50 gallons. A household like the one the test assumes can compare this figure directly. For a household with lower hot-water demand, the class comparison is less direct. To compare other sizes or fuels, use the water heater selector by fuel, space and size.
The running cost is not stated here because it depends on your state's average residential gas price. The page calculates it from your ZIP code and the 192 therms figure. The cost calculator for your own ZIP runs the same calculation. No installed price range is published for this model. Its ratings fall outside the range of data the cost database's model was built on, and the site does not extend the range beyond that data. If you are checking a replacement, you can find a same-class replacement by model number and compare its annual figure with 192 therms at the same draw pattern.
DOE CCD · 2026-09-19