DoesTheMath

A. O. SMITH water heaters

What A. O. SMITH has on file with the DOE CCD — as filed, with no rating of the brand itself.

A. O. SMITH has 171 basic models on file with the DOE CCD, across 5 heater types. Of the 170 that sit in a class large enough to compare, 58 use less energy a year than their class median. Every model below links to its own page.


By heater type

Counts and ranges as filed. A class median is only used where eight or more models share the class.

A. O. SMITH: basic models by heater type
Heater typeModelsUEF rangeBelow class median
A gas tank 64 0.57–0.9 25 of 64
An electric tank 59 0.88–3.88 18 of 59
A gas tankless unit 33 0.81–0.95 15 of 33
An electric tankless unit 14 0.92–0.94 0 of 14
A short tank built to sit under a counter 1 0.9 no class median
DOE CCD · 2026-09-19

Every model

Grouped by heater type, alphabetical within each.

An electric tank 59 models
A gas tank 64 models
A gas tankless unit 33 models
An electric tankless unit 14 models
A short tank built to sit under a counter 1 model

What this page does not say

Nothing about how long A. O. SMITH heaters last, how often they fail or how its warranty compares: no registry this site reads publishes any of it, and this site does not estimate it. The DOE CCD records what each model is certified to do, and that is what this page counts.