JOHN WOOD HPACO-45 1**+AXST-80 1**
3.8 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 checking this model against the registry: JOHN WOOD HPACO-45 1**+AXST-80 1**, an electric tank, uses 1,306 kWh a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That equals its class median of 1,306 kWh, a 0 kWh difference, across 194 models.
Energy use per year
1,306 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 equal to the median of 1,306 kWh for the 194 models registered in the same heater type and draw pattern; it ranks 89 of 194, lowest energy first.
Solid line: this model (1,306 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
- 3.8 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
- 73 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
$3,938–$4,714 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 JOHN WOOD model on file
What this brand files, by heater type.
UEF 3.8 · Grade C Price it on your ZIP
This model's registry UEF, the ratio of hot water delivered to energy used, is 3.8. The annual figure of 1,306 kWh is not a registry entry. This site computed it from that UEF and the daily hot-water draw in the DOE test for the high draw pattern, using DOE CCD data retrieved on 2026-09-19. The fuel is electricity. The class is the 194 models registered as an electric tank at the high draw pattern. Its median is 1,306 kWh, so this model's difference from the median is 0 kWh. It ranks 89th lowest in energy use of 194, which places it in the second-lowest quarter of its class. That rank describes energy use under test conditions only.
The high draw pattern is the test setting for a larger household, or one where showers and laundry overlap. For that setting the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 95 gallons, and a rated volume of 73 gallons. These two values and the 1,306 kWh figure are the ones to compare when you check a replacement of the same class. The replacement finder searches by model number. The figure does not describe a home whose hot-water use differs from the test's daily draw. Consumption in such a home could be higher or lower, and this page has no measured value for it. The water heater selector filters by fuel, space and size.
Running cost is not written in the text because it depends on your own utility electricity rate, and this page assumes no rate. The quantity to multiply by that rate is the 1,306 kWh at the high draw pattern. The cost calculator does this from your ZIP code, and how the annual cost is calculated sets out the steps. A modeled installed-cost range appears in its own block on the page with its source and date. It is a modeled range, not a quote, and it is not repeated here. Because 1,306 kWh equals the class median of 1,306 kWh, at the test's daily draw and the same rate this model would cost the same to run as a model at the median.
DOE CCD · 2026-09-19