A. O. SMITH HPTU-66N 1**
3.45 UEF DOE CCD · 2026-09-19Grade C: 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).
If you are verifying the A. O. SMITH HPTU-66N 1**, this site computes 1,438 kWh of electricity a year for it. That figure belongs to the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 132 kWh above the 1,306 kWh median of the 194 electric tank models registered at the same draw pattern.
Energy use per year
1,438 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 above the median of 1,306 kWh for the 194 models registered in the same heater type and draw pattern; it ranks 135 of 194, lowest energy first.
Solid line: this model (1,438 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
- 3.45 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
- 79 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 67 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2019-04-05 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)
- No 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
$3,703–$4,308 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 · 2026-09-24Does 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 3.45 · Grade C Price it on your ZIP
The 1,438 kWh figure is not printed in the registry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high pattern. For this model the UEF is 3.45, from DOE CCD data retrieved 2026-09-19. The result holds only at the test's daily draw. This page has no figure for a household that draws a different amount. Among the 194 electric tank models registered at the high draw pattern, this one ranks 135th lowest for energy use. That places it in the second-highest quarter of its class for energy use. The steps are set out in how the annual cost is calculated.
The high draw pattern describes a larger household, or one where showers and laundry overlap. For that use, the registry lists 79 gallons as the first hour rating, the gallons of hot water available in the first hour from a full tank. The rated volume is 67 gallons. The data on this page covers the high draw pattern only. No energy figure is available for this model at a smaller household's daily use. The rank given above means models with lower energy use exist at the same draw pattern. To compare them, use find a same-class replacement by model number or the selector by fuel, space and size.
The running cost is not stated in this text. It depends on your own utility's electricity tariff, and this page does not estimate it. The cost calculator on your own ZIP applies your rate to the 1,438 kWh figure. The same rate sets what the 132 kWh gap to the class median of 1,306 kWh adds each year. Both results carry the condition of the energy figure: the high draw pattern at the test's daily draw. The installed price range appears in its own block on this page, with its source and date. It is a modeled installed-cost range, not a quote, and this text does not restate its figures.
DOE CCD · 2026-09-19