Richmond RTG-84XLN-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 Richmond RTG-84XLN-3, 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 class median of 182 therms. It ranks 229th lowest of the 397 gas tankless units registered at this 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
- 4.4 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
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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 Richmond model on file
What this brand files, by heater type.
UEF 0.82 · Grade G Price it on your ZIP
The registry does not print the 206 therms figure. This site calculated it from two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used. The second is the DOE test's daily hot-water draw for the high draw pattern. For the RTG-84XLN-3, the listed UEF is 0.82. The source is the DOE Compliance Certification Database (DOE CCD), retrieved 2026-09-19. The figure therefore holds at the federal test's daily draw, not at the actual use of any particular household. If your home uses more or less hot water than the test assumes, its annual use will differ from 206 therms. This page does not have a figure for this model at your own usage. When you check a quote or a listing, compare this figure only with other figures stated at the high draw pattern.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The RTG-84XLN-3 lists a maximum flow rate in gallons per minute of 4.4. Within its class, its annual energy use sits in the second-highest quarter. In plain terms, more models in the class use less gas than this one at the test's draw than use more. If you are sizing for a smaller household, note that this page has no figure at a lower draw pattern. To compare other fuels, spaces and sizes, use the water heater selector by fuel, space and size. To look up alternatives in the same class, find a same-class replacement by model number.
The text of this page gives no running cost. That cost depends on your state's average residential natural gas price, so the page calculates it from your ZIP. The calculation applies that rate to the 206 therms figure at the high draw pattern. The unit sits 24 therms above the class median. At the same rate, its yearly gas cost will therefore be higher than that of a model at the class median. Enter your ZIP in the cost calculator for your own ZIP to see the result. The method is set out in how the annual cost is calculated. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19