DoesTheMath

AMERICAN STANDARD WATER HEATERS ELV055*2***** vs LG APHWC502D: which uses less energy?

At the high draw pattern the LG APHWC502D uses 1,181 kWh a year and the AMERICAN STANDARD WATER HEATERS ELV055*2***** 5,278 — 4,096 kWh (78%) less, about 40,964 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 high draw pattern.

Filed and computed figures
AMERICAN STANDARD WATER HEATERS ELV055*2***** LG APHWC502D
UEF (Uniform Energy Factor) 0.94 4.2 (better)
Energy use per year (kWh) 5,278 1,181 (better)
First hour rating (gal) 77 81
Rated storage volume (gal) 55 53
Installed cost range $1,879–$2,711 not published
ENERGY STAR certified not matched yes
Refrigerant not filed R-134a, GWP 1430
On the market since not filed 2026-01-01
DOE CCD · 2026-09-19

What it costs to run

AMERICAN STANDARD WATER HEATERS ELV055*2*****: 5,278 kWh a year LG APHWC502D: 1,181 kWh a year

AMERICAN STANDARD WATER HEATERS ELV055*2***** — 5,278 kWh a year LG APHWC502D — 1,181 kWh a year

LG APHWC502D is 4,097 kWh a year lower than AMERICAN STANDARD WATER HEATERS ELV055*2*****.

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 LG APHWC502D if running cost matters most: it uses 4,096 kWh less a year on the same test.
  • Pick the AMERICAN STANDARD WATER HEATERS ELV055*2***** if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the LG APHWC502D.
  • Neither if your household's busiest hour needs more than 81 gallons of hot water — neither lists more. Check whether a 50-gallon heater is enough.

Each model on its own

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