RINNAI RE160E (REU-VE2125WD-US)
0.81 UEF DOE CCD · 2026-09-19Grade G: 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 the RINNAI RE160E (REU-VE2125WD-US)? At the medium draw pattern, the standard daily hot-water usage DOE tests against, it uses 137 therms of natural gas a year. That is 2 therms above the 135 therms median of the 80 gas tankless models registered at that draw pattern.
Energy use per year
137 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 135 therms for the 80 models registered in the same heater type and draw pattern; it ranks 52 of 80, lowest energy first.
Solid line: this model (137 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
- 0.81 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
- 3.7 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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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 RINNAI model on file
What this brand files, by heater type.
UEF 0.81 · Grade G Price it on your ZIP
The figure of 137 therms is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.81 for this model, and from the DOE test's daily hot-water draw for the medium draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure applies only to natural gas and only to that draw, which represents a typical family household on a busy morning. It is a test-condition value, not a measurement of any particular home.
Against its class, the unit ranks 52nd lowest energy use of 80, which puts it in the second-highest quarter of its class for energy use. The gap to the class median of 135 therms is 2 therms, so the difference is small in absolute terms. The registry also lists a maximum flow rate in gallons per minute of 3.7. The data used here does not say how many fixtures that flow supports, so this page makes no claim about it. To compare this model with another unit in the same class, find a same-class replacement by model number.
The running cost is not stated as a figure here because it depends on the state average residential gas price where you live. The cost calculator applies that price, from your ZIP, to the 137 therms shown above. How the annual cost is calculated explains the steps. A household whose hot-water use differs from the medium draw pattern should not read 137 therms as its own annual use, and this page has no value for other draw patterns. The installed-cost range is shown in its own block as a modeled range, not a quote.
DOE CCD · 2026-09-19