DoesTheMath

FRIEDRICH PROE47 S2 RH CG vs Rheem PROE47 S2 RH95: which uses less energy?

At the medium draw pattern the Rheem PROE47 S2 RH95 uses 3,493 kWh a year and the FRIEDRICH PROE47 S2 RH CG 3,531 — 38 kWh (1%) less, about 380 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
FRIEDRICH PROE47 S2 RH CG Rheem PROE47 S2 RH95
UEF (Uniform Energy Factor) 0.92 0.93 (better)
Energy use per year (kWh) 3,531 3,493 (better)
First hour rating (gal) 54 54
Rated storage volume (gal) 43 43
Installed cost range $1,692–$1,978 $1,699–$2,194
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

FRIEDRICH PROE47 S2 RH CG: 3,531 kWh a year Rheem PROE47 S2 RH95: 3,493 kWh a year

FRIEDRICH PROE47 S2 RH CG — 3,531 kWh a year Rheem PROE47 S2 RH95 — 3,493 kWh a year

Rheem PROE47 S2 RH95 is 38 kWh a year lower than FRIEDRICH PROE47 S2 RH CG.

DOE CCD · 2026-09-19

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Enter your ZIP to price both units on the same rate where you live.

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 Rheem PROE47 S2 RH95 if running cost matters most: it uses 38 kWh less a year on the same test.
  • Pick the FRIEDRICH PROE47 S2 RH CG if the installed price matters more than the running cost: its modeled installed range is $1,692–$1,978 against $1,699–$2,194.
  • Neither if your household's busiest hour needs more than 54 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

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