STATE ATO-180B-N 1**
0.82 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 the STATE ATO-180B-N 1**, a gas tankless unit, it uses 206 therms of natural gas a year. That figure is for the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 24 therms above the 182 therms median of the 397 gas tankless models registered at the same draw pattern.
Energy use per year
206 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 229 of 397, lowest energy first.
Solid line: this model (206 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
- 0.82 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
- 4.7 gal/min DOE CCD · 2026-09-19
What it costs to install
$1,745–$2,687 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 STATE model on file
What this brand files, by heater type.
UEF 0.82 · Grade G Price it on your ZIP
This site calculated the 206 therms figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the daily hot-water draw that the DOE test sets for the high draw pattern. This model's UEF is 0.82, from the DOE CCD, retrieved 2026-09-19. The result shows gas use at the test's draw. It is not a measurement from any particular home. The class has 397 gas tankless models registered at the high draw pattern. By energy use, this model ranks 229th lowest of 397. That puts it in the second-highest quarter of its class for energy use. The steps behind the figure are explained in how the annual cost is calculated.
The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 206 therms figure applies to a home that fits that description. The registry also lists a maximum flow rate in gallons per minute of 4.7 for this model. A household that uses less hot water than the test's daily draw would burn a different amount of gas. That lower figure is not available in this data, so this page does not estimate it. A home that does not match the high draw pattern falls outside what the figure describes. To check other gas tankless units at the high draw pattern, use a same-class replacement search by model number. To compare by fuel, space and size, use the water heater selector.
This text does not state the running cost, because it depends on your state's average residential natural gas price. The page calculates the cost from your ZIP by applying that price to 206 therms a year at the high draw pattern. This model sits 24 therms above its class median, as noted above. So at any single gas price, its calculated cost is higher than the median model's. Your actual bills also depend on your household's real hot-water use, and that is unknown here. The installed-cost range in its own block is a modeled range, not a quote. It is separate from the running cost. To see the running cost at your own rate, use the cost calculator for your ZIP.
DOE CCD · 2026-09-19