Water Heaters

A. O. Smith Announces Industry-First X3® Scale Prevention Technology Now Available for Suite of Condensing Gas Tankless Water Heaters

April 07, 2022

Condensing Gas Tankless Water Heaters

ASHLAND CITY, Tenn. – A. O. Smith, an expert in water heating and treatment, announces the addition of X3® Scale Prevention Technology to its full line of residential condensing gas tankless water heaters. Designed with both consumers and contractors in mind, X3 Technology prevents scale buildup in a tankless unit, eliminating the need for routine descaling maintenance, tripling the expected lifetime of a unit and enabling it to run at like-new performance and efficiency.

“We continuously hear from technicians and homeowners that scale buildup is the number one issue with tankless water heaters. This buildup can shorten a unit’s lifespan, increase unnecessary repairs and maintenance costs, and decrease efficiency," said Robert Aldrich, residential segment development leader at A. O. Smith. “After years of in-depth research and testing, we’re proud to be the first water technology company in the industry to offer its tankless water heaters with scale prevention technology."

X3 Technology means you never have to descale a tankless water heater again – alleviating maintenance time for contractors and reducing ownership costs for homeowners. Units featuring X3 Technology work especially well in homes with hard water where damaging scale and mineral deposits are more common. The units use up to 199,000 BTU/hr of natural gas to deliver a continuous supply of hot water to residential applications.

Available on A. O. Smith’s suite of condensing gas tankless products (240, 340 and 540 indoor and outdoor, natural gas and propane models), units with X3 Technology offer customers an array of sizes to fit a variety of application needs. These products are also backed by the industry’s only limited warranty with no exclusions for scale-related failures.

Contractors interested in learning more can visit A. O. Smith University, Our online training portal currently offers tankless courses to ensure professionals are educated on the installation and maintenance of A. O. Smith tankless units.

To celebrate the launch of this industry-first technology, A. O. Smith presents “3X the Summer Heat with X3 Technology" promotion. Running May 1 through Aug. 31, 2022, Contractor Rewards members who purchase A. O. Smith tankless units featuring X3 Scale Prevention Technology will receive three times the Contractor Rewards points and will be entered into a sweepstakes to win a beach vacation of their choice in Miami or Cancun, Mexico; or a Bahamas cruise. For more information and complete contest rules, visit

For more information on A. O. Smith tankless water heaters with X3 Scale Prevention Technology, visit

About A. O. Smith

A. O. Smith Corporation is a leading global manufacturer and marketer of residential and commercial water heaters. A. O. Smith offers its customers an additional advantage in that the company designs, builds, distributes and supports the world’s broadest and deepest line of residential and commercial water heaters, as well as commercial boilers. This single-source concept simplifies ordering, installation and service and is backed by 80 years of research and innovation. For the most up-to-date A. O. Smith news, like us on Facebook, follow us on Twitter and visit

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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