Ruud RTG-70XLN-3
0.82 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 397 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tankless unit, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking the Ruud RTG-70XLN-3, a gas tankless unit, it uses 206 therms of natural gas a year. That figure belongs to the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 24 therms above the 182 therms median of the 397 gas tankless models registered at that pattern.
Energy use per year
206 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 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 229 of 397, lowest energy first.
Solid line: this model (206 therms). Dashed line: the class median.
Min 173 therms Median 182 therms Max 209 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
- 0.82 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tankless unit at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 4 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,745–$2,687 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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How to size a tankless water heater by GPM
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 tankless water heaters
Gas-fired instantaneous units, sized by flow rate rather than tank gallons.
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Every Ruud model on file
What this brand files, by heater type.
UEF 0.82 · Grade G Price it on your ZIP
The 206 therms figure is computed by this site, not published by the registry. 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. For the Ruud RTG-70XLN-3, the UEF is 0.82, from DOE CCD data retrieved 2026-09-19. At that draw, it ranks 229th lowest energy use of 397 models in its class. A plumber or seller checking a listing can match the model number and UEF against the registry entry. The annual figure does not describe any single home. A household that draws more or less hot water than the test assumes will use a different amount of gas. That amount is not available here. The method behind the annual energy and cost figures sets out each step.
The high draw pattern describes a larger household, or one where showers and laundry overlap. This model's maximum flow rate in gallons per minute is 4. A home whose peak demand exceeds 4 gallons per minute needs more flow than this rating covers. The registry gives no per-fixture flow data, so the fit for a specific home is unknown from this page. A reader focused on gas use should note the 229th rank. Models ranked before it in the same class use less gas at the same draw. The same-class replacement search by model number lists models in this class. The selector by fuel, space and size covers other fuels and heater types.
The running cost is not stated in this text. It equals the 206 therms figure priced at the reader's state average residential gas price, and that price differs by state. The page computes it from the reader's ZIP code in the cost calculator for your own ZIP. This model sits 24 therms a year above the class median at the test's draw. At any given gas rate, its hot-water gas cost is therefore higher than that of a model at the class median. The size of that gap depends on the rate, so no figure for it is given here. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. Rates set by a local utility, rather than the state average, are not available on this page.
DOE CCD · 2026-09-19