AMERICAN STANDARD WATER HEATERS ARIHPWH-50 vs FRIEDRICH PROPH50 T2 RH400-30: which uses less energy?

At the medium draw pattern the FRIEDRICH PROPH50 T2 RH400-30 uses 837 kWh a year and the AMERICAN STANDARD WATER HEATERS ARIHPWH-50 866 — 29 kWh (3%) less, about 290 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 medium draw pattern.

Filed and computed figures
Figure	AMERICAN STANDARD WATER HEATERS ARIHPWH-50	FRIEDRICH PROPH50 T2 RH400-30
UEF (Uniform Energy Factor)	3.75	3.88 (better)
Energy use per year (kWh)	866	837 (better)
First hour rating (gal)	68	67
Rated storage volume (gal)	45	45
Installed cost range	$3,024–$4,400	$3,039–$4,530
ENERGY STAR certified	yes	yes
Refrigerant	R-134a, GWP 1430	R-134a, GWP 1430
On the market since	2023-01-01	2024-06-24

DOE CCD · 2026-09-19

What it costs to run

AMERICAN STANDARD WATER HEATERS ARIHPWH-50 — 866 kWh a year FRIEDRICH PROPH50 T2 RH400-30 — 837 kWh a year

FRIEDRICH PROPH50 T2 RH400-30 is 29 kWh a year lower than AMERICAN STANDARD WATER HEATERS ARIHPWH-50.

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 AMERICAN STANDARD WATER HEATERS ARIHPWH-50 since 2023-01-01, the FRIEDRICH PROPH50 T2 RH400-30 since 2024-06-24. A sale date, not a lifespan.

Which should you pick?

Pick the FRIEDRICH PROPH50 T2 RH400-30 if running cost matters most: it uses 29 kWh less a year on the same test.
Pick the AMERICAN STANDARD WATER HEATERS ARIHPWH-50 if you need more hot water in your busiest hour: it lists a first hour rating of 68 gallons against 67.
Neither if your household's busiest hour needs more than 68 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

AMERICAN STANDARD WATER HEATERS ARIHPWH-50

Its filed figures, class position and running cost on your ZIP.
FRIEDRICH PROPH50 T2 RH400-30

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