A. O. SMITH HPTA-80 2 vs RELIANCE WATER HEATERS HPTV-80 2: which uses less energy?

At the high draw pattern the A. O. SMITH HPTA-80 2** uses 1,279 kWh a year and the RELIANCE WATER HEATERS HPTV-80 2** 1,654 — 375 kWh (23%) less, about 3,751 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
Figure	A. O. SMITH HPTA-80 2**	RELIANCE WATER HEATERS HPTV-80 2**
UEF (Uniform Energy Factor)	3.88 (better)	3
Energy use per year (kWh)	1,279 (better)	1,654
First hour rating (gal)	95	93
Rated storage volume (gal)	81	82
Installed cost range	not published	not published
ENERGY STAR certified	yes	yes
Sound level (dB)	not filed	45
Refrigerant	R-134a, GWP 1430	R-513A, GWP 630
On the market since	2024-03-01	2023-07-10

DOE CCD · 2026-09-19

What it costs to run

A. O. SMITH HPTA-80 2** — 1,279 kWh a year RELIANCE WATER HEATERS HPTV-80 2** — 1,654 kWh a year

A. O. SMITH HPTA-80 2** is 375 kWh a year lower than RELIANCE WATER HEATERS HPTV-80 2**.

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 A. O. SMITH HPTA-80 2** since 2024-03-01, the RELIANCE WATER HEATERS HPTV-80 2** since 2023-07-10. A sale date, not a lifespan.

Which should you pick?

Pick the A. O. SMITH HPTA-80 2** if running cost matters most: it uses 375 kWh less a year on the same test.
Pick the RELIANCE WATER HEATERS HPTV-80 2** if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the A. O. SMITH HPTA-80 2**.
Neither if your household's busiest hour needs more than 95 gallons of hot water — neither lists more.

Each model on its own

A. O. SMITH HPTA-80 2**

Its filed figures, class position and running cost on your ZIP.
RELIANCE WATER HEATERS HPTV-80 2**

Its filed figures, class position and running cost on your ZIP.