Richmond RTGH-84DVLN-3
0.93 UEF DOE CCD · 2026-09-19Grade C: 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 RTGH-84DVLN-3, it uses 182 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That equals the median of 182 therms for the 397 gas tankless models registered at that pattern. It ranks 183rd lowest in energy use of 397.
Energy use per year
182 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 equal to the median of 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 183 of 397, lowest energy first.
Solid line: this model (182 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
- 0.93 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
$2,264–$3,294 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 Richmond model on file
What this brand files, by heater type.
UEF 0.93 · Grade C Price it on your ZIP
This site calculated the 182 therms figure; the registry does not list it. The calculation uses the model's UEF, the ratio of hot water delivered to energy used, which is 0.93. It also uses the DOE test's daily hot-water draw for the high pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure applies only at that test draw. Your household's actual daily draw may differ, and the data gives no energy figure for any other level of use. So a figure for your own household is not available here. Because the figure is modeled, you cannot confirm it directly on the registry listing. What you can confirm there is the UEF of 0.93. The steps are set out on the page explaining how the annual cost is calculated.
The high draw pattern represents a larger household, or one where showers and laundry overlap. The 182 therms figure applies to that level of use. This unit's maximum flow rate in gallons per minute is 4.5. That rating limits how much hot water the unit can deliver at one time. Whether 4.5 is enough for a particular home depends on the flow rates of its fixtures, and this data does not include them. A home that uses much less hot water each day does not match the test condition. For that home, the annual figure above would not apply as stated. If you need a different fuel, space or size, the water heater selector by fuel, space and size compares units on those terms.
Within its class, this unit sits exactly at the median. It is 0 therms from 182 therms and ranks 183rd lowest of 397 models. That places it in the second-lowest quarter of its class for energy use. From the ranking alone, some models in the same class use less energy, but this data does not name them. You can find a same-class replacement by model number. The running cost is not given in this text because it depends on your state's average residential gas price. The page calculates it from your ZIP in the cost calculator for your own ZIP, based on the same 182 therms figure. The installed price appears in its own block, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19