RHEEM/ECOSENSE RTG-84DVLN-1
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 RHEEM/ECOSENSE RTG-84DVLN-1, it uses 206 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 24 therms above the 182 therms median for the 397 gas tankless models tested at the same draw 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.
UEF 0.82 · Grade G Price it on your ZIP
This site computed the 206 therms figure; the registry does not list it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high draw pattern. For this model the UEF is 0.82. The high draw pattern stands for a larger household, or one where showers and laundry overlap. The figure holds only at that federal test draw. It does not describe a home whose daily hot-water use differs from the test's, and that home's actual gas use is not available here. The source is the DOE CCD, retrieved 2026-09-19. The page on how the annual energy and cost figures are calculated sets out each step.
The RTG-84DVLN-1 ranks 229th lowest in energy use of the 397 gas tankless models registered at the high draw pattern. That puts it in the second-highest quarter of its class for energy use. It sits 24 therms above the 182 therms class median, so most comparable models use less gas at the same test draw. The comparison applies only within this class. It says nothing about tank or electric models, or about other draw patterns. The model's maximum flow rate in gallons per minute is 4.5. The registry data does not show how that flow rate matches a particular home's fixtures, so that match is not available on this page. To compare models in the same class, find a same-class replacement by model number.
The page text does not give a running cost for the 206 therms this model uses. That cost depends on the reader's state average residential gas price, so the page calculates it from the reader's ZIP. The same applies to the 24 therms gap above the class median, because its cost also changes with the state rate. The running-cost calculator for your own ZIP applies your state rate to this model's annual figure. A separate block on this page shows the installed-cost range with its source and date. That range is a modeled estimate, not a quote, and it is not repeated here. The registry does not show gas use in any particular home, so that figure is unknown.
DOE CCD · 2026-09-19