DoesTheMath

ALSETRIA HPWH - 65G vs JOHN WOOD HPACO-45 1**+AXST-66 1**: which uses less energy?

At the high draw pattern the ALSETRIA HPWH - 65G uses 1,272 kWh a year and the JOHN WOOD HPACO-45 1**+AXST-66 1** 1,341 — 69 kWh (5%) less, about 688 kWh over ten years. Both are filed as an electric tank, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

Compared within one class only: models filed as an electric tank at the high draw pattern.

Filed and computed figures
ALSETRIA HPWH - 65G JOHN WOOD HPACO-45 1**+AXST-66 1**
UEF (Uniform Energy Factor) 3.9 (better) 3.7
Energy use per year (kWh) 1,272 (better) 1,341
First hour rating (gal) 80 82
Rated storage volume (gal) 60 60
Installed cost range $3,528–$4,692 $3,505–$4,492
ENERGY STAR certified yes yes
Sound level (dB) 49 not filed
Refrigerant R-134a, GWP 1430 R-744 (CO2), GWP 1
On the market since 2024-11-10 2026-02-13
DOE CCD · 2026-09-19

What it costs to run

ALSETRIA HPWH - 65G: 1,272 kWh a year JOHN WOOD HPACO-45 1**+AXST-66 1**: 1,341 kWh a year

ALSETRIA HPWH - 65G — 1,272 kWh a year JOHN WOOD HPACO-45 1**+AXST-66 1** — 1,341 kWh a year

ALSETRIA HPWH - 65G is 69 kWh a year lower than JOHN WOOD HPACO-45 1**+AXST-66 1**.

DOE CCD · 2026-09-19

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Reliability

Not published: Reliability, failure rates and each model’s actual warranty term.

The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.

What is here instead:

  • The filed efficiency, capacity and tank size of both models, side by side below.
  • Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
  • Time on the market, as filed with ENERGY STAR: the ALSETRIA HPWH - 65G since 2024-11-10, the JOHN WOOD HPACO-45 1**+AXST-66 1** since 2026-02-13. A sale date, not a lifespan.

Which should you pick?

  • Pick the ALSETRIA HPWH - 65G if running cost matters most: it uses 69 kWh less a year on the same test.
  • Pick the JOHN WOOD HPACO-45 1**+AXST-66 1** if you need more hot water in your busiest hour: it lists a first hour rating of 82 gallons against 80.
  • Neither if your household's busiest hour needs more than 82 gallons of hot water — neither lists more. Check whether a 65-gallon heater is enough.

Each model on its own

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