AMERICAN TK-510U-E 2**
0.81 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).
If you are checking this unit's figures: AMERICAN TK-510U-E 2**, a gas tankless unit, uses 209 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 27 therms above the class median of 182 therms across 397 comparable models.
Energy use per year
209 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 323 of 397, lowest energy first.
Solid line: this model (209 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
- 0.81 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
- 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.
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How every figure on this page is calculated
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Answered from what models in this size actually file.
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Gas-fired instantaneous units, sized by flow rate rather than tank gallons.
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Every AMERICAN model on file
What this brand files, by heater type.
UEF 0.81 · Grade G Price it on your ZIP
The registry lists AMERICAN TK-510U-E 2** with a UEF, the ratio of hot water delivered to energy used, of 0.81. The registry does not state annual gas use for this model. This site computed 209 therms of natural gas by combining that UEF with the DOE test's daily hot-water draw for the high draw pattern. The figure therefore applies only to that test draw, which describes a larger household, or one where showers and laundry overlap. It is not a measurement of any particular home. The source is the DOE CCD, retrieved 2026-09-19.
Among the 397 models registered as a gas tankless unit at the high draw pattern, this model ranks 323rd lowest in energy use. Its 209 therms sits 27 therms above the class median of 182 therms, which places it in the highest quarter of its class for energy use. Its maximum flow rate in gallons per minute is 5. The data on this page do not say whether that flow meets the peak demand of a specific home. A reader whose main concern is low gas use at this draw pattern will find that most of the class uses less, and can look for a same-class option through the same-class replacement search.
The running cost is not stated here because it depends on the state average residential gas price where you live. Multiplying 209 therms by that price gives the yearly gas cost at the test draw. The cost calculator does this from your ZIP, and how the annual cost is calculated lists the inputs it uses. Real use differs from the test draw, and this page has no data on any household's actual hot-water use. To compare by fuel, space and size instead, use the water heater selector.
DOE CCD · 2026-09-19