STATE ATO-140B-N 1**
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 this unit's yearly gas use, STATE ATO-140B-N 1** uses 137 therms of natural gas a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 2 therms above the class median of 135 therms across 80 models.
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
- 3.6 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
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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 STATE model on file
What this brand files, by heater type.
UEF 0.81 · Grade G Price it on your ZIP
This site computed the figure of 137 therms; the registry does not publish it. The inputs are the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw. This unit's UEF is 0.81. The result applies only to the medium draw pattern, which fits a typical multi-person household. It is natural gas use, taken from DOE CCD data retrieved on 2026-09-19. The maximum flow rate in gallons per minute is 3.6, but that rating does not enter the energy figure. Treat the result as a test-condition value, not a metered household total.
Against its class, STATE ATO-140B-N 1** uses 2 therms more than the median of 135 therms. Its rank is 52nd lowest energy use of 80 models registered as a gas tankless unit at the medium draw pattern. That places it in the second-highest quarter of the class for energy use. The gap is 2 therms on a base of 135 therms. Figures for other draw patterns are not available on this page. The steps behind each number are set out in how the annual cost is calculated.
The figure suits a reader who wants to check a listing against the registry at the medium draw pattern. It does not describe a household whose daily hot-water use differs from that pattern, because 137 therms is tied to the test's draw. Running cost depends on your state's average residential gas price, which this text does not state. Enter your ZIP in the cost calculator for your own rate to apply that price to 137 therms. To look at other units in the same class as this one, use the same-class replacement search by model number.
DOE CCD · 2026-09-19