DoesTheMath

AMERICAN STANDARD WATER HEATERS PV50SLN*-65* vs ARISTON PV50TLN*-65*: which uses less energy?

At the high draw pattern the ARISTON PV50TLN*-65* uses 238 therms a year and the AMERICAN STANDARD WATER HEATERS PV50SLN*-65* 245 — 7 therms (3%) less, about 69 therms over ten years. Both are filed as a gas tank, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

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

Filed and computed figures
AMERICAN STANDARD WATER HEATERS PV50SLN*-65* ARISTON PV50TLN*-65*
UEF (Uniform Energy Factor) 0.69 0.71 (better)
Energy use per year (therms) 245 238 (better)
First hour rating (gal) 110 107
Rated storage volume (gal) 47 47
Installed cost range $2,068–$3,846 $2,184–$4,146
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

AMERICAN STANDARD WATER HEATERS PV50SLN*-65*: 245 therms a year ARISTON PV50TLN*-65*: 238 therms a year

AMERICAN STANDARD WATER HEATERS PV50SLN*-65* — 245 therms a year ARISTON PV50TLN*-65* — 238 therms a year

ARISTON PV50TLN*-65* is 7 therms a year lower than AMERICAN STANDARD WATER HEATERS PV50SLN*-65*.

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.
  • The actual warranty term is printed in each model’s documentation, not in any registry.

Which should you pick?

  • Pick the ARISTON PV50TLN*-65* if running cost matters most: it uses 7 therms less a year on the same test.
  • Pick the AMERICAN STANDARD WATER HEATERS PV50SLN*-65* if you need more hot water in your busiest hour: it lists a first hour rating of 110 gallons against 107.
  • Neither if your household's busiest hour needs more than 110 gallons of hot water — neither lists more. Check whether a 50-gallon heater is enough.

Each model on its own

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