RELIANCE WATER HEATERS FMHR-40 4**
0.58 UEF DOE CCD · 2026-09-19Grade G: 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 verifying this model, the registry data gives 191 therms of natural gas a year. The figure is for the medium draw pattern, the standard daily hot-water usage DOE tests against. It is 6 therms above the 185 therms median of 288 gas tank models.
Energy use per year
191 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 above the median of 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 231 of 288, lowest energy first.
Solid line: this model (191 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
- 0.58 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
- 59 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 38 gal DOE CCD · 2026-09-19
What it costs to install
$1,293–$1,862 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety 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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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 40-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 0.58 · Grade G Price it on your ZIP
This model has a UEF, the ratio of hot water delivered to energy used, of 0.58. This site computed 191 therms a year from that UEF and the DOE test's daily hot-water draw for the medium draw pattern. The registry does not publish the annual figure itself. The source is DOE CCD, retrieved 2026-09-19. The figure holds only for that draw pattern and for natural gas. Its rank is 231st lowest energy use of 288 models, which places it in the highest quarter of its class for energy use. The gap to the class median of 185 therms is 6 therms, above the median.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 59 gallons. The rated volume is 38 gallons. The annual figure suits a household whose hot-water use matches the medium draw pattern. It suits a household less well if its use differs from that pattern, because the figure then does not apply. An annual figure for other draw patterns is not available for this model. Models ranked before 231st use less energy at the same draw pattern. A water heater selector filters by fuel, space and size.
The running cost is not stated in the text. It depends on your state's average residential gas price, and this page does not estimate it. Enter your ZIP in the cost calculator to apply that price to 191 therms a year. The methodology page explains how the annual cost is calculated. Any result applies to the medium draw pattern only. To find a same-class replacement, search by model number with FMHR-40 4** from RELIANCE WATER HEATERS. The installed price range appears in its own block with its source and date, so it is not repeated here.
DOE CCD · 2026-09-19