A. O. SMITH HPTS-50 2**
3.8 UEF DOE CCD · 2026-09-19Grade A: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the A. O. SMITH HPTS-50 2**, this site's calculation gives 855 kWh of electricity a year. That figure is for the medium draw pattern, the standard daily hot-water usage DOE tests against. It sits 2,676 kWh below the 3,531 kWh median of the 426 electric tank models at that draw pattern.
Energy use per year
855 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 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 16 of 426, lowest energy first.
Solid line: this model (855 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 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
- 3.8 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium 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
- 65 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 46 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2022-06-06 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
$3,062–$4,459 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 3.8 · Grade A Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 3.8 for this model. This site multiplies that value by the DOE test's daily hot-water draw for the medium draw pattern. The result is 855 kWh of electricity a year, and it applies only at that draw pattern. The registry does not publish an annual energy figure itself, and the source is DOE CCD, retrieved 2026-09-19. Among the 426 models registered as an electric tank at the medium draw pattern, this one ranks 16th lowest in energy use. That places it in the lowest quarter of its class. Its use is 2,676 kWh below the class median of 3,531 kWh.
The figure suits a reader whose hot-water use resembles the medium draw pattern, since that is the only condition the 855 kWh was computed for. It does not describe a household whose use differs from that pattern, and figures at other draw patterns are not available for this model on this page. Capacity is a separate check. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 65 gallons, and the rated volume is 46 gallons. Energy rank says nothing about whether those gallons cover your own peak demand. To compare tanks by fuel, space and size, use the water heater selector, or find a same-class replacement by model number if you are matching an existing unit.
The running cost is not stated here because it depends on your own utility electricity tariff. The calculation is direct: 855 kWh multiplied by your rate per kilowatt-hour, at the medium draw pattern. The cost calculator applies your ZIP code to this model's 855 kWh. The annual cost methodology explains how that result is calculated. A separate block on this page shows a modeled installed-cost range with its own source and date. It is a modeled range, not a quote, and it is not repeated in this text. The difference of 2,676 kWh a year from the class median only becomes a cost once your rate is applied.
DOE CCD · 2026-09-19