TAKAGI TK-110U-E 2**
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).
If you are checking the TAKAGI TK-110U-E 2**, a gas tankless unit, it uses 137 therms of natural gas a year. That figure belongs to the medium draw pattern, the standard daily hot-water usage DOE tests against. It sits 2 therms above the 135 therms median of the 80 models in its class.
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
- 3.5 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 TAKAGI model on file
What this brand files, by heater type.
UEF 0.81 · Grade G Price it on your ZIP
The 137 therms figure was computed by this site from registry data, not copied from a registry field. Its first input is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.81 for this model. The second input is the DOE test's daily hot-water draw for the medium pattern, which represents a typical three- or four-person household. The result therefore holds only at the federal test's draw, and energy use at any other daily draw is not available here. The data come from the DOE CCD, retrieved 2026-09-19, and the page on how the annual cost is calculated sets out each step.
Against the 80 models registered as a gas tankless unit at the medium draw pattern, this model ranks 52nd lowest in energy use. That rank places it in the second-highest quarter of its class for energy use, above the class median given earlier. Its maximum flow rate in gallons per minute is 3.5, a figure separate from the annual energy use. The figures here describe a household close to the medium pattern; for one whose daily use differs widely, they do not apply directly. To check other models in the same class, find a same-class replacement by model number.
This text states no running cost for the TAKAGI TK-110U-E 2**, because the cost of 137 therms of natural gas depends on your rate. The page computes it from your state's average residential gas price, using your ZIP. You can rerun that step with the cost calculator on your own ZIP. At any single rate, the difference from the median model is the price of 2 therms of gas a year. The installed price range sits in its own block with its source and date, and it is a modeled installed cost, not a quote.
DOE CCD · 2026-09-19