FRIEDRICH RTGH-68DVLN-3
0.9 UEF DOE CCD · 2026-09-19Grade D: where this UEF sits among the 80 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tankless unit, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
Checking FRIEDRICH RTGH-68DVLN-3? This gas tankless unit uses 123 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 12 therms below the class median of 135 therms among 80 gas tankless models.
Energy use per year
123 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 below the median of 135 therms for the 80 models registered in the same heater type and draw pattern; it ranks 10 of 80, lowest energy first.
Solid line: this model (123 therms). Dashed line: the class median.
Min 114 therms Median 135 therms Max 137 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
- 0.9 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tankless unit at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 3.5 gal/min DOE CCD · 2026-09-19
What it costs to install
$2,122–$3,129 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 0.9 · Grade D Price it on your ZIP
The figure of 123 therms is a modeled value, not a metered one. This site computed 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 medium draw pattern. The registry lists a UEF of 0.9 for FRIEDRICH RTGH-68DVLN-3. The registry does not publish an annual energy figure itself. The source is the DOE CCD, retrieved 2026-09-19. The value applies to natural gas at that draw only. A home that uses more or less hot water than the test assumes will use more or less gas. Metered use in a real home is not available in this data.
Among the 80 models registered as a gas tankless unit at the medium draw pattern, this model has the 10th lowest energy use. That puts it in the lowest quarter of its class. Its 123 therms is 12 therms below the class median of 135 therms. That comparison covers the medium draw pattern only; other draw patterns are not compared here. The maximum flow rate in gallons per minute is 3.5. The temperature rise behind that rating is not available in this data. These figures fit a household on natural gas whose hot-water use resembles the typical family case behind the medium pattern. They do not describe a household on another fuel, or one with much heavier or lighter use. For a different fuel or size, the selector by fuel, space and size starts from those inputs.
The running cost is not stated as a figure here because it depends on the state average residential gas price where the reader lives. The annual cost is the 123 therms at the medium draw pattern multiplied by that price per therm. The cost calculator on your own ZIP does that multiplication for this model, and how the annual cost is calculated sets out the steps. Because this model sits 12 therms below the class median of 135 therms, it uses less gas than the median model at the same draw pattern, so its gas cost is lower at the same price. The size of that gap depends on the rate. To look at another unit in the same class, find a same-class replacement by model number. The installed price range is shown in its own block on this page with its source and date.
DOE CCD · 2026-09-19