Tankless with X3® Scale Prevention Technology
X3® Scale Prevention Technology prevents scale build-up, meaning virtually zero lifetime descaling maintenance and three times longer product life. Now available on our suite of condensing gas tankless water heaters.
X3® Scale Prevention Technology
Scale is the #1 enemy for tankless technology. With normal use, typical gas tankless water heaters begin to scale up over time. Scale reduces efficiency and increases annual cost of operation. Regular descaling is required to keep typical gas tankless water heaters operational, leading to ongoing maintenance costs.
An expert in both water heating and treatment, A. O. Smith has combined the two technologies to achieve unparalleled protection on our existing 540, 340 and 240 condensing gas tankless models. X3® Scale Prevention Technology prevents scale build-up, meaning virtually zero lifetime descaling maintenance and three times longer product life. Now available on our suite of condensing gas tankless water heaters.
Benefits of Gas Tankless Water Heaters with X3® Technology
Extends Life Up To 3 Times Longer
The new X3® Scale Prevention Technology eliminates particle build-up in the heat exchangers, preventing scaling and extending the life of the unit.
Maintains Like-New Performance
Tests showed tankless models with X3® Scale Prevention Technology maintained like-new efficiency after 15 simulated years vs. models without X3® technology showed 10% efficiency reduction in just 1.5 years.
Never Descale Again. Ever.
X3® Scale Prevention Technology eliminates the need for regular scale-related maintenance as it prevents scale from ever building up.
"Peace of Mind" Scale-Inclusive Warranty Coverage
A. O. Smith stands behind this revolutionary product with the industry’s first ever “Peace of Mind" limited warranty. Unlike competitive warranties, this 15-year limited warranty covers scale-related failures should they occur.
Get Instant Hot Water
Tankless with X3® Scale Prevention Technology are recirculation pump capable with the use of a cross-over valve available through APCOM. Cross-over valve sold separately.
Rebates & Tax Credits
Up to $850 in Local Utility Rebates may be available in your area!
*Gas water heaters with UEF of 0.82 or higher OR with a thermal efficiency of at least 90%. Local utility rebates available in limited geographical areas. For information on the Federal Tax Credit, go to: energystar.gov. Check with your tax advisor for applicability. Offer details and expiration may vary. See Rebate Center for details.
How it Works
How X3® Scale Prevention Technology Eliminates Scaling Problems
Condensing gas tankless water heaters with X3® Scale Prevention Technology are attached directly to the water line. When you open a hot water tap, the burner in your gas tankless water heater activates. As water flows through the unit, it quickly reaches the preset temperature by rapidly absorbing heat from both heat exchangers. Our patent pending X3® Scale Prevention Technology allows mineral particles to pass through harmlessly while also continually protecting the heat exchanger from scale buildup. This eliminates the need for regular descaling and extends the unit’s life up to three times vs. a tankless model without X3® Scale Prevention Technology.
Due to this direct heat exchange, these condensing gas tankless water heaters provide long-lasting, on-demand hot water. When the water tap is turned off, the unit shuts down to conserve energy.
Still Have Questions?
Product Comparison
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.
Find A Local Water Heater Pro
A. O. Smith water heaters are professionally installed by local independent contractors.
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Why A. O. Smith?
A. O. Smith is a leading manufacturer of both residential and commercial water heating technologies, including the #1 most specified commercial water heater.
For more than 145 years, we’ve developed state-of-the art products that push new boundaries and improve the lives of our customers.
We combine cutting-edge technology with committed people who take pride in providing the very best support for our customers.
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.