LOCHINVAR 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).
If you are checking the LOCHINVAR FMDV-30 2**, this is its annual energy use. It is 182 therms of natural gas at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 3 therms below the 185 therms median of the 288 gas tank models registered at that 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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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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Answered from what models in this size actually file.
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Gas-fired storage tanks, every size and draw pattern on file.
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What this brand files, by heater type.
UEF 0.61 · Grade F Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.61 for the LOCHINVAR FMDV-30 2**. This site did not take the annual figure from the registry. It computed 182 therms of natural gas per year from that UEF and the DOE test's daily hot-water draw for the medium draw pattern, using data from DOE CCD retrieved on 2026-09-19. Against the 288 gas tank models registered at the same pattern, the unit sits 3 therms below the class median of 185 therms. That gives it the 73rd lowest energy use of 288, in the second-lowest quarter of its class. The data does not include the spread between neighboring ranks, so it does not show how much separates this model from those near it.
The energy figure applies only to the medium draw pattern, which represents a typical household on a busy morning. A household whose hot-water use differs from that pattern will see different consumption, and this page has no figures for other patterns. Hot-water capacity is described by the first hour rating, the gallons of hot water available in the first hour from a full tank, which is 60 gallons for this model. Its rated volume is 29 gallons. The unit suits a household whose peak-hour demand fits within 60 gallons and whose use resembles the medium pattern. It does not suit a household whose demand exceeds that rating, or one that needs a different fuel. To narrow options by fuel, space and size, use the water heater selector.
The running cost is not printed here because it depends on your state's average residential gas price. The 182 therms figure is the quantity of natural gas to price, at the medium draw pattern. Enter your ZIP in the cost calculator to get the cost at your own rate. The calculation method explains how the annual cost is derived from the registry's UEF of 0.61. An installed price range is also not published for this model: its ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. Any installation figure would be an estimate, and this page does not give one.
DOE CCD · 2026-09-19