Richmond RTG-84XLN-1
0.81 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 verifying this listing, the Richmond RTG-84XLN-1 uses 209 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 27 therms above its class median of 182 therms, ranking 323rd lowest energy use of 397.
Energy use per year
209 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 323 of 397, lowest energy first.
Solid line: this model (209 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
- 0.81 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
$1,698–$2,632 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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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 0.81 · Grade G Price it on your ZIP
The 209 therms figure is computed by this site, not taken from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw the DOE test sets for the high draw pattern. For this model the UEF is 0.81. The registry data comes from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure holds only at that test draw. A household drawing more or less hot water each day will use a different amount of gas. The method is set out in how the annual cost is calculated. The registry also lists a maximum flow rate in gallons per minute of 4.5 for this unit. That is a separate rating from annual energy use.
Its class is the 397 models registered as a gas tankless unit at the high draw pattern. Within that class, this model uses 27 therms more than the 182 therms median. Its rank of 323rd lowest energy use of 397 places it in the highest quarter of its class for energy use. The high draw pattern describes a larger household, or one where showers and laundry overlap. A reader in that situation matches the conditions behind the 209 therms figure. A reader with lower daily use falls outside those conditions, and the test figure does not show what this unit would use for them. A plumber or seller checking a swap can compare same-class models with find a same-class replacement by model number.
The running cost is not stated in this text. It depends on the average residential natural gas price in the reader's state. The page computes it from the reader's ZIP, using the 209 therms figure at the high draw pattern. The same 27 therms gap above the class median can cost a different amount from state to state. No single cost figure therefore applies to every reader. To see the cost on your own rate, use the cost calculator on your own ZIP. The installed-cost range shown elsewhere on this page is a modeled range, not a quote, with its source and date in its own block. How this unit's gas use would change under a different daily draw is not available in the registry data.
DOE CCD · 2026-09-19