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Residential Water Heaters

Replace your home’s old, inefficient water heater with an A. O. Smith ENERGY STAR® Certified model. Choose a gas or electric tank or tankless, hybrid heat pump, or combi boiler to enjoy a steady supply of hot water whenever you need it. Use our convenient Product Selector Tool to choose the right product for your home.

Shop by Residential Water Heater Type

The new Adapt premium gas tankless hot water heater image made to look like a swiss army knife


Ultra Flexible. Fewer Trips. More Savings.

Introducing the new Adapt™ Premium Condensing Gas Tankless Water Heaters with X3® Scale Prevention Technology.

Product Comparison

Adapt XE
Standard Non-Condensing Gas Tankless Water Heater
Adapt XE Premium Condensing Gas Tankless Water Heater with X3® Technology
Standard Non-Condensing Gas Tankless Water Heater
Adapt Premium Condensing Gas Tankless Water Heater
Single Shower Length
37 minutes
Showers Back-to-Back
4.7 minutes
Showers at the Same Time
3.2 showers
3.1 showers
Maximum Tub Size
87 gallons
X3® Scale Prevention Technology
Continuous Hot Water
Space Savings
Energy Efficiency
Hot Water Storage Supply
6 Years
15 Years

*Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in your local area, but actual performance may vary depending on factors beyond our ability to control or estimate.

Pressure Tanks

Protect your closed loop system with a pressure tank.

Parts & Accessories

Find all the parts and accessories for your water heater.

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Water Heater Resources

Interactive tools, product manuals, warranty information, the A. O. Smith mobile app, and more.

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Not sure which product is right for you?

Take our water heater selector quiz to find the correct water heater for your home.

Why A. O. Smith?

Market Leader

A. O. Smith is a leading manufacturer of both residential and commercial water heating technologies, including the #1 most specified commercial water heater.

Commitment to Innovation

For more than 145 years, we’ve developed state-of-the art products that push new boundaries and improve the lives of our customers.

Best-In-Class Support

We combine cutting-edge technology with committed people who take pride in providing the very best support for our customers.

Unmatched Quality

Our products are put through rigorous quality and endurance testing so now matter where hot water is needed, A. O. Smith can provide a solution you can count on.

Learn more about A. O. Smith