RELIANCE WATER HEATERS FMHR-30 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 a registry entry for the RELIANCE WATER HEATERS FMHR-30 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 equals the class median of 185 therms across 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
- 63 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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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 registry lists this model with a UEF, the ratio of hot water delivered to energy used, of 0.6. This site computed 185 therms of natural gas a year from that UEF. It used the DOE test's daily hot-water draw for the medium draw pattern. The registry does not state this figure itself. The inputs come from the DOE CCD, retrieved on 2026-09-19. Against the 288 gas tank models at the medium draw pattern, the class median is 185 therms. The difference from the median is 0 therms. By energy use the model ranks 89th lowest of 288, in the lower half of its class.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 63 gallons. The rated volume is 29 gallons. Both are registry values, and the annual figure rests on the UEF. This entry suits a reader who wants to check the energy figure at the medium draw pattern against other gas tank models. It does not suit a reader whose household uses more or less hot water than the test draw, because 185 therms applies only at that draw. To compare other fuels or sizes, the water heater selector by fuel, space and size covers them. To find a same-class model from a model number, use the same-class replacement finder.
Running cost is not written here. It depends on the state average residential gas price for the reader's ZIP. The cost follows from 185 therms at the medium draw pattern and that price. The cost calculator on your own ZIP applies the rate, and the page on how the annual cost is calculated lists the steps. An installed price range is not published for this model. Its ratings, a UEF of 0.6 and a rated volume of 29 gallons, lie outside the range the cost database's model was fitted on. That range is not stretched past its limit.
DOE CCD · 2026-09-19