American-branded water heaters produced by the American Water Heater Company are fundamentally the same as A.O. Smith units, because A.O. Smith acquired the company and fully integrated its manufacturing operations, engineering standards, and supply chains. Consequently, tanks rolling out of those production facilities share identical internal design architecture, proprietary glass-lining formulas, burner assemblies, and rigorous testing protocols with flagship A.O. Smith models. The distinctions between them are largely limited to external cosmetic labels and specific wholesale versus retail distribution channels.
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