A. O. SMITH HPTV-66 2**
3.2 UEF DOE CCD · 2026-09-19Grade D: 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).
For a quick check: the A. O. SMITH HPTV-66 2**, an electric tank, uses 1,550 kWh a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 244 kWh above the class median of 1,306 kWh, and it ranks 162nd lowest in energy use among 194 models.
Energy use per year
1,550 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 162 of 194, lowest energy first.
Solid line: this model (1,550 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
- 3.2 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
- 76 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 68 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2023-07-10 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-513A, GWP 630 ENERGY STAR · 2026-09-19
- Sound level (ENERGY STAR) how loud the unit is while it runs, in decibels as filed
- 45 dB ENERGY STAR · 2026-09-19
What it costs to install
$3,707–$4,067 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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All 120-volt plug-in heat pump water heaters
Heat pump models whose ENERGY STAR filing lists a 120 V input — the kind that can run from a standard outlet instead of a new 240 V circuit.
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Every A. O. SMITH model on file
What this brand files, by heater type.
UEF 3.2 · Grade D Price it on your ZIP
The annual figure of 1,550 kWh was computed by this site, not by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high draw pattern. The registry lists a UEF of 3.2 for this model. The fuel is electricity, and the source is the DOE CCD, retrieved 2026-09-19. The class median of 1,306 kWh covers the 194 models registered as an electric tank at the same draw pattern. This model's difference of 244 kWh puts it in the highest quarter of its class for energy use. The comparison holds only at the test's draw. It does not describe measured use in any particular home.
The first hour rating, the gallons of hot water available in the first hour from a full tank, is 76 gallons, and the rated volume is 68 gallons. The high draw pattern corresponds to a larger household, or one where showers and laundry overlap, so the energy figure is most relevant to a home that uses hot water that way. For a household with a lighter draw, the registry gives no energy figure for this model, so that value is not available. A reader who ranks models by energy use alone should note that this unit sits 244 kWh above the median of 1,306 kWh. The water heater selector filters by fuel, space and size, if those matter more than the class comparison.
The running cost is not stated in this text because it depends on your own utility electricity tariff. Multiply 1,550 kWh by your rate per kilowatt-hour to get a yearly figure at the test's draw. The cost calculator does this from your ZIP, and how the annual cost is calculated sets out the method. Installed cost appears in its own block on this page as a modeled range, not a quote, so it is not restated here. To compare HPTV-66 2** with other units in its class, use the same-class replacement lookup by model number. The limit of this page is that every figure is modeled at the federal test's draw, not measured in your home.
DOE CCD · 2026-09-19