DoesTheMath

ARISTON ENS40L-* vs GE Profile PF40S10FPY01: which uses less energy?

At the low draw pattern the GE Profile PF40S10FPY01 uses 724 kWh a year and the ARISTON ENS40L-* 2,439 — 1,715 kWh (70%) less, about 17,154 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 ENS40L-* GE Profile PF40S10FPY01
UEF (Uniform Energy Factor) 0.92 3.1 (better)
Energy use per year (kWh) 2,439 724 (better)
First hour rating (gal) 46 46
Rated storage volume (gal) 36 40
Installed cost range $1,591–$1,802 $2,787–$3,703
ENERGY STAR certified not matched yes
Sound level (dB) not filed 41
Refrigerant not filed R1234YF
On the market since not filed 2025-05-27
DOE CCD · 2026-09-19

What it costs to run

ARISTON ENS40L-*: 2,439 kWh a year GE Profile PF40S10FPY01: 724 kWh a year

ARISTON ENS40L-* — 2,439 kWh a year GE Profile PF40S10FPY01 — 724 kWh a year

GE Profile PF40S10FPY01 is 1,715 kWh a year lower than ARISTON ENS40L-*.

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 GE Profile PF40S10FPY01 if running cost matters most: it uses 1,715 kWh less a year on the same test.
  • Pick the ARISTON ENS40L-* if the installed price matters more than the running cost: its modeled installed range is $1,591–$1,802 against $2,787–$3,703.
  • Neither if your household's busiest hour needs more than 46 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

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