FRIEDRICH 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 FRIEDRICH RTGH-84DVLN-3, this gas tankless unit uses 182 therms of natural gas a year. That figure applies to the high setting of the draw pattern, the standard daily hot-water usage DOE tests against. It equals the median of 182 therms for its class, a difference of 0 therms.
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
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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 FRIEDRICH model on file
What this brand files, by heater type.
UEF 0.93 · Grade C Price it on your ZIP
The 182 therms figure is calculated by this site. The registry does not list it. The calculation 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 draw pattern. For the FRIEDRICH RTGH-84DVLN-3, the registry lists a UEF of 0.93 under that federal test. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at the test's daily draw. A home that uses more or less hot water will use a different amount of gas. This page cannot say how large that difference would be for any single home. The steps behind the figure are set out in how the annual cost is calculated.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The FRIEDRICH RTGH-84DVLN-3 lists a maximum flow rate in gallons per minute of 4.5. That is the most hot water it is rated to deliver at once. A home whose overlapping fixtures call for more than 4.5 needs more than this listed rate. There are 397 models registered as gas tankless units at the high draw pattern. This one ranks 183rd lowest for energy use among them. Its annual energy use equals the class median given above. A smaller household falls outside the test condition behind 182 therms, so the figure does not describe its use. If you are comparing other fuels or sizes, use the selector by fuel, space and size.
This text states no running cost. The yearly cost of 182 therms of natural gas depends on your state's average residential gas price. This page does not assume that price. The cost calculator on your own ZIP applies your price to this model's figure at the high draw pattern. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. You may be checking a replacement from the same class as the FRIEDRICH RTGH-84DVLN-3. If so, use the page to find a same-class replacement by model number, which searches among the 397 models in this class.
DOE CCD · 2026-09-19