A. O. SMITH HPTA-80 2**
3.88 UEF DOE CCD · 2026-09-19Grade B: where this UEF sits among the 194 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, high draw pattern (a larger household, or one where showers and laundry overlap).
Checking the A. O. SMITH HPTA-80 2**: as an electric tank at the high draw pattern, the standard daily hot-water usage DOE tests against, it uses 1,279 kWh a year. That is 27 kWh below the class median of 1,306 kWh across 194 models registered in the same class.
Energy use per year
1,279 kWh 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 electricity rate where you live.
That is below the median of 1,306 kWh for the 194 models registered in the same heater type and draw pattern; it ranks 72 of 194, lowest energy first.
Solid line: this model (1,279 kWh). Dashed line: the class median.
Min 1,002 kWh Median 1,306 kWh Max 5,334 kWh
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
- 3.88 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 95 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 81 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2024-03-01 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- Yes (CTA-2045-A,CTA-2045-B) ENERGY STAR · 2026-09-19
- Refrigerant and GWP (ENERGY STAR) the refrigerant a heat pump unit uses and its global warming potential, a leak's climate effect relative to carbon dioxide (CO2 = 1)
- R-134a, GWP 1430 ENERGY STAR · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's rated tank size lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety 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 · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Compressor operating range (ENERGY STAR)
- the air temperatures around the unit in which its heat pump runs; outside this range the heat pump stops
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
What 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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What size heat pump water heater do I need?
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 heat pump water heaters
Electric tanks that file a UEF of 2.0 or more — the registry has no separate heat pump type, so this site draws the line there.
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Every A. O. SMITH model on file
What this brand files, by heater type.
UEF 3.88 · Grade B Price it on your ZIP
The figure of 1,279 kWh is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 3.88 with the daily hot-water draw the DOE test assigns to the high draw pattern. The fuel is electricity, and the source is DOE CCD, retrieved 2026-09-19. The figure applies only to that test draw. A household that draws more or less hot water than the test will use a different amount. The rated volume of 81 gallons is listed for reference and is not an input to this calculation.
The comparison group is the 194 models registered as an electric tank at the high draw pattern. Their median is 1,306 kWh, so this model sits 27 kWh below it. It ranks 72nd lowest energy use of 194, which places it in the second-lowest quarter of its class. The high draw pattern describes a larger household, or one where showers and laundry overlap. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 95 gallons. A household whose busiest hour needs more than that is outside what this rating covers. A smaller household is not the case the test draw describes, and the water heater selector filters by fuel, space and size.
The running cost depends on your own utility electricity rate, so no cost figure is written here. The cost calculator applies your ZIP to the 1,279 kWh shown above. The methodology page explains how that annual cost is calculated. An installed price range is not published for this model. Its ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. If you are comparing this unit with a possible substitute, the replacement finder looks up a same-class model by model number. This page does not cover reliability or any comparison outside the class.
DOE CCD · 2026-09-19