Water Heaters

Smart and Powerful: A. O. Smith Launches ProLine® Electric Tankless Series

September 25, 2019

New product line features Dry Fire Protection among other installer benefits

The ProLine Electric Tankless ASHLAND CITY, Tenn. – A. O. Smith, a leading water heater manufacturer, has added depth to its diverse product portfolio with the introduction of the ProLine® Electric Tankless family for commercial, residential and point-of-use applications.


The ProLine Electric Tankless is available in three sizes, with 45 different models ranging from 2.4kW to 32kW and Uniform Energy Factor up to 0.93. The units are available in a variety of voltage options: 120V, 208V, 240V, and 277V.

A. O. Smith enters the electric tankless market with a number of innovative features and benefits previously unavailable in this category. All models have true Dry Fire Protection. The element will only turn on when the chamber is full of water, meaning that plumbers and electricians have the freedom to work without fear of costly dry fires. All models also have Scale Reduction Technology. This feature reduces scale formation on the elements and on the chamber walls, which reduces failures and service requirements. Further, the units do not contain any moving parts or screens—another common place scale buildup can occur.

“We’re excited to bring the ProLine Electric Tankless family to our partners, who can now offer a complete line of A. O. Smith products to their customers,” said David Chisolm, vice president of marketing at A. O. Smith. “Contractors will be extremely comfortable installing these units—which plumb very similarly to standard electric water heaters—and end-users will appreciate their compact size, reliability and energy-saving capabilities.”

The single-chamber design, which features a pre-heat function that helps bring domestic hot water faster to the fixture, is compact enough to be mounted directly under a sink, in a remote bathroom or other hard-to-plumb area.

The largest unit in the family, the four-chamber model, can produce up to 4.25 gallons of hot water per minute—enough to support 2.5 baths in a whole-home or multi-family application. The two-chamber design is ideal for applications where the heater is close to where the hot water is being used, such as cabins. Both sizes feature a soft start power draw, so that lights do not dim during a heavy power draw.

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 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