DoesTheMath

ARISTON ENS30L-* vs Richmond PROE30 T2 RH95: which uses less energy?

At the low draw pattern the ARISTON ENS30L-* uses 2,413 kWh a year and the Richmond PROE30 T2 RH95 2,439 — 26 kWh (1%) less, about 262 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 low draw pattern.

Filed and computed figures
ARISTON ENS30L-* Richmond PROE30 T2 RH95
UEF (Uniform Energy Factor) 0.93 (better) 0.92
Energy use per year (kWh) 2,413 (better) 2,439
First hour rating (gal) 44 44
Rated storage volume (gal) 27 27
Installed cost range $1,467–$1,793 $1,461–$1,577
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

ARISTON ENS30L-*: 2,413 kWh a year Richmond PROE30 T2 RH95: 2,439 kWh a year

ARISTON ENS30L-* — 2,413 kWh a year Richmond PROE30 T2 RH95 — 2,439 kWh a year

ARISTON ENS30L-* is 26 kWh a year lower than Richmond PROE30 T2 RH95.

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 ARISTON ENS30L-* if running cost matters most: it uses 26 kWh less a year on the same test.
  • Pick the Richmond PROE30 T2 RH95 if the installed price matters more than the running cost: its modeled installed range is $1,461–$1,577 against $1,467–$1,793.
  • Neither if your household's busiest hour needs more than 44 gallons of hot water — neither lists more. Check whether a 30-gallon heater is enough.

Each model on its own

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