FRIEDRICH RTG-84DVLN-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).
You are checking a gas tankless unit. The FRIEDRICH RTG-84DVLN-3 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, among 397 models.
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.
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Every FRIEDRICH model on file
What this brand files, by heater type.
UEF 0.82 · Grade G Price it on your ZIP
The figure of 206 therms is computed by this site, not by the registry. It starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.82 for this model. It then applies the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw and only for natural gas. Actual use in a home can differ, and this page does not estimate by how much. See how the annual cost is calculated for the method.
By rank, it is 229th lowest in energy use of 397 models at the high draw pattern. That places it in the second-highest quarter of its class for energy use. Its use is 24 therms above the class median of 182 therms. The high draw pattern describes a larger household, or one where showers and laundry overlap. Such a household can compare this unit with others on the same test draw. A household with a smaller draw should not read the figure as its own. Models below the median of 182 therms use less at this draw. You can find a same-class replacement by model number to see them.
The running cost is not stated here, because it depends on your state's average residential gas price. Multiplying the annual use of 206 therms by that price per therm gives a yearly figure. The cost calculator for your own ZIP does this calculation. This model's maximum flow rate in gallons per minute is 4.5. That value is a rated limit, and it is separate from the annual energy figure. The installed price range appears in its own block on this page, with its source and date. Real gas use in a home may differ from 206 therms, and the registry data cannot show by how much.
DOE CCD · 2026-09-19