DoesTheMath

AMERICAN STANDARD WATER HEATERS ENS30LU-* vs Lennox WHES030L45SN240B****: which uses less energy?

At the low draw pattern the AMERICAN STANDARD WATER HEATERS ENS30LU-* and the Lennox WHES030L45SN240B**** use the same energy, 2,413 kWh a year each, on the same federal test. Both are filed as an electric tank, so the comparison holds; what separates them is below. Enter your ZIP to price either one on your own rate.

Side by side

Compared within one class only: models filed as an electric tank at the low draw pattern.

Filed and computed figures
AMERICAN STANDARD WATER HEATERS ENS30LU-* Lennox WHES030L45SN240B****
UEF (Uniform Energy Factor) 0.93 0.93
Energy use per year (kWh) 2,413 2,413
First hour rating (gal) 40 44
Rated storage volume (gal) 27 27
Installed cost range $1,467–$1,793 $1,467–$1,793
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

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 AMERICAN STANDARD WATER HEATERS ENS30LU-* if its price or availability suits you — on energy the two are level.
  • Pick the Lennox WHES030L45SN240B**** if you need more hot water in your busiest hour: it lists a first hour rating of 44 gallons against 40.
  • 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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