STATE HPACO-45 1**+AXST-50LBTTP 1**
3.55 UEF DOE CCD · 2026-09-19Grade B: 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 verifying this model: the STATE HPACO-45 1**+AXST-50LBTTP 1**, an electric tank, uses 915 kWh of electricity a year. That figure holds at the medium draw pattern, the standard daily hot-water usage DOE tests against, at the federal test's daily draw. It sits 2,616 kWh below its class median of 3,531 kWh, ranking 60th lowest of 426.
Energy use per year
915 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 60 of 426, lowest energy first.
Solid line: this model (915 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
- 3.55 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
- 72 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 48 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2026-02-13 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-744 (CO2), GWP 1 ENERGY STAR · 2026-09-19
What it costs to install
$3,099–$4,228 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 CO₂ (R-744) heat pump water heaters
Heat pump models whose ENERGY STAR filing names R-744 (carbon dioxide) as the refrigerant, a global warming potential of 1.
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Every STATE model on file
What this brand files, by heater type.
UEF 3.55 · Grade B Price it on your ZIP
The 915 kWh figure is not printed in the registry. This site computed it from the model's UEF, the ratio of hot water delivered to energy used, which the registry lists as 3.55. The second input is the DOE test's daily hot-water draw for the medium draw pattern. The UEF comes from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The same listing gives a rated volume of 48 gallons. It also gives a first hour rating, the gallons of hot water available in the first hour from a full tank, of 72 gallons. If a seller or plumber quotes a different yearly figure, check which draw pattern and daily draw it assumes. A figure computed at another draw pattern cannot be compared directly with 915 kWh.
The medium draw pattern stands for a typical three- or four-person household. For a home that uses about that much hot water, 915 kWh is the figure to check against. Its 60th place among 426 models puts it in the lowest quarter of its class for energy use, but only at this draw pattern. A household that draws more or less hot water each day will use a different amount of energy. This page does not have that figure, and it is not estimated here. Whether the 72-gallon first hour rating covers a larger household's busy morning is not stated in the data. To look at other sizes, use the selector by fuel, space and size. To match this unit, find a same-class replacement by model number.
This text states no running cost, because the cost depends on your own utility electricity tariff. Your yearly cost is 915 kWh multiplied by the rate you pay per kWh. The cost calculator on your own ZIP applies your local rate to that figure. The page on how the annual cost is calculated explains the method step by step. The 2,616 kWh gap to the class median turns into a cost difference the same way, at your rate. That difference is not available in this text, since no rate is assumed. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote for this HPACO-45 1**+AXST-50LBTTP 1** unit.
DOE CCD · 2026-09-19