Ruud RTG-84DVLN-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-84DVLN-3, it uses 206 therms of natural gas a year. That figure is at 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
- 4.5 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 this unit the UEF is 0.82, and the figure holds only at that test draw. The registry data comes from the DOE CCD, retrieved 2026-09-19. Among the 397 gas tankless models at the high draw pattern, this unit ranks 229th lowest in energy use. That places it in the second-highest quarter of its class for energy use. A household that draws more or less hot water than the test assumes will use a different amount. The page cannot state that amount, because the data covers only the test condition. The method behind the annual figure sets out each step of the calculation.
The high draw pattern describes a larger household, or one where showers and laundry overlap. That is the usage the 206 therms figure assumes. The registry lists this unit's maximum flow rate in gallons per minute as 4.5. Whether that flow covers a given home depends on how many outlets run at once, which the registry does not record. A home that matches the high pattern is the case the class comparison was built for. A home with lighter use does not match the test, so the 206 therms figure will not describe it. For a unit sized to a different load, the selector by fuel, space and size filters by those inputs. To compare against models in the same class, find a same-class replacement by model number.
Running cost is not stated here, because it depends on your state's average residential gas price. The page multiplies the 206 therms figure by that price once you enter a ZIP. The cost calculator on your own ZIP runs that step. A unit at the 182 therms class median would use 24 therms less gas a year at the same test draw. On your rate, those 24 therms are the yearly cost gap between this model and the median. The modeled installed-cost range sits in its own block, with its source and date. It is a modeled range, not a quote. What this unit will cost to run at a home's actual usage is unknown from the registry alone.
DOE CCD · 2026-09-19