RELIANCE WATER HEATERS G6N-UT4040NVR 5**
0.64 UEF DOE CCD · 2026-09-19Grade G: 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 RELIANCE WATER HEATERS G6N-UT4040NVR 5**, this gas tank heater uses 264 therms of natural gas a year. That figure applies at the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 4 therms above the 260 therms median of the 414 gas tank models tested at that pattern.
Energy use per year
264 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 260 therms for the 414 models registered in the same heater type and draw pattern; it ranks 236 of 414, lowest energy first.
Solid line: this model (264 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
- 0.64 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
- 83 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
$1,643–$2,763 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 a water heater that fits
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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 0.64 · Grade G Price it on your ZIP
The 264 therms figure is computed by this site. The registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high pattern. This model's UEF is 0.64, taken from the DOE CCD and retrieved 2026-09-19. Among the 414 gas tank models at that pattern, it is 236th from the lowest in energy use. That places it in the second-highest quarter of its class for energy use. The steps behind the annual figure are set out in how this site calculates annual energy use and cost.
The high draw pattern stands for a larger household, or one where showers and laundry overlap. For that kind of use, the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 83 gallons. The rated volume is 38 gallons. A household that draws less hot water each day falls outside the test condition behind 264 therms. This page has no energy figure for other draw patterns, so that figure is not available here. To compare units by fuel, space and size, use the water heater selector by fuel, space and size.
The running cost is not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP in the running cost calculator for your own ZIP. The same applies to the 4 therms gap above the class median: what it costs depends on your rate. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. If you are checking a like-for-like swap, you can find a same-class replacement by model number and compare its figure with 264 therms.
DOE CCD · 2026-09-19