Is AO Smith or Rheem a better electric water heater?

Choosing whether A. O. Smith or Rheem is a better electric water heater depends on model tier and features, as both brands are top-tier and very comparable in overall quality and lifespan. For standard electric tank models, both offer similar glass-lined tanks, dual heating elements, and 6, 9, and 12-year warranty options. In independent testing, both perform similarly for first-hour delivery and energy factor. Differences emerge in specific features. A. O. Smith's Signature and ProLine electric models are widely available at Lowes and are known for robust heating elements and good insulation, while Rheem's Performance Platinum electric models are common at Home Depot and often include premium features like a brass drain valve and better anode protection on longer warranty models. For heat pump hybrid electric water heaters, which are much more energy efficient, both brands have strong offerings. Rheem's ProTerra and Performance Platinum hybrid and A. O. Smith's Voltex hybrid are both Energy Star certified and can cut water heating costs by up to 75 percent compared to standard electric. Rheem's Gladiator and ProTerra lines include built-in leak detection and auto shutoff, which is a valuable smart feature. A. O. Smith's Voltex is often praised for slightly quieter operation. In terms of price, Rheem is often slightly cheaper at retail, while A. O. Smith may have broader plumber supply distribution. Either brand will serve well if you buy a 9-year or 12-year warranty model and maintain it.