AO Smith offers 2 tankless water heaters models in the lineup we track. This page is the AO Smith-specific cut of the broader Tankless Water Heaters water heaters category — same product class, narrowed to the AO Smith catalog only.
<p>AO Smith's water heaters lineup is one of the most-shopped in the category — and there are concrete reasons it stays that way year after year. This page is the complete index of every AO Smith water heaters model we currently track, with verified specifications, current Amazon pricing, aggregated ratings, and head-to-head comparison links against the strongest competitors in each price tier. Before you start filtering, the next several minutes will give you the context you need to make a confident pick.</p> <h2 id="brand-overview">About AO Smith in water heaters</h2> <p>On warranty length...
For the complete AO Smith lineup across all sub-types and capacities, see the AO Smith Water Heaters hub.
If you're cross-shopping tankless water heaters beyond AO Smith, the following brands also ship in this category:
Tankless water heaters (also called on-demand or instantaneous water heaters) heat water as it flows through the unit, eliminating the storage tank entirely. The trade-offs are clear: endless hot water, lower operating cost over a long ownership horizon, and a much smaller footprint — at the cost of higher upfront price and more demanding install requirements (gas line sizing, venting, electrical load). With roughly 1,581 monthly US searches for "tankless water heater," this is one of the most-shopped sub-types in the category.
Tankless splits into two fundamentally different products: gas tankless (condensing or non-condensing) and electric tankless. They serve different households.
Gas tanklessFor the complete tankless buyer's guide (all brands, full comparison framework), see the Tankless Water Heaters category hub.
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