RELIANCE WATER HEATERS FMDV-30 2**
0.61 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).
To check this model's figures: RELIANCE WATER HEATERS FMDV-30 2** uses 182 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 3 therms below the class median of 185 therms across 288 gas tank models registered at the same draw pattern.
Energy use per year
182 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 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 73 of 288, lowest energy first.
Solid line: this model (182 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
- 0.61 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
- 60 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 RELIANCE WATER HEATERS model on file
What this brand files, by heater type.
UEF 0.61 · Grade F Price it on your ZIP
The figure of 182 therms is computed by this site, not by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, which is 0.61 for this model, with the DOE test's daily hot-water draw for the medium draw pattern. The source is DOE CCD, retrieved 2026-09-19. Its rank is 73rd lowest energy use of 288, in the second-lowest quarter of its class for energy use. The figure applies to the test's draw only. Actual gas use in a home depends on how much hot water that home draws.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 60 gallons, and the rated volume is 29 gallons. The medium draw pattern is a typical household on a busy morning, and the annual energy figure is written for that use. A household whose busiest hour needs more than 60 gallons falls outside what this rating covers. A household that draws less than the test will use less gas than 182 therms. The gap to the class median is 3 therms against a median of 185 therms, so energy use is one measure beside the ratings above. To narrow a choice, use the water heater selector by fuel, space and size or find a same-class replacement by model number.
The running cost is not stated in the text, because it depends on the state average residential gas price, which differs by reader. The cost calculator on your own ZIP computes it from the annual energy of 182 therms and that price. The page on how the annual cost is calculated describes the method. The installed price range is not published for RELIANCE WATER HEATERS FMDV-30 2**. Its ratings, a UEF of 0.61 and a rated volume of 29 gallons, lie outside the range the cost database's model was fitted on, and the range is not stretched past it. No installed price estimate is available.
DOE CCD · 2026-09-19