Commercial Tankless Water Heater

Commercial Water Heating Solutions

Sometimes the difference between "open for business" and "closed for repairs" is the reliability of a water heating system.

That's why for decades, a full spectrum of commercial applications - from retrofit to new construction and light to heavy - have trusted Rinnai Tankless Water Heaters. Because the system configures to your needs and to every kind of space, every usage demand is the perfect Rinnai fit - and that makes it easy to do business.

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Commercial Solutions

Where The Demands Are Greatest RINNAI DELIVERS

Nearly 100 years ago, we at Rinnai established a tradition of creating solutions that redefine quality and reliability, enhancing the way people live and improving the way businesses operate.

Leveraging decades of global commercial water heating experience, Rinnai Tankless Water Heaters deliver performance and dependability. Precision engineering with a focus on commercial demands allows Rinnai Tankless Water Heaters to produce an endless supply of hot water to suit even the most intensive applications—from restaurants to hotels to multifamily residences to schools and more—conserving energy that can save thousands of dollars in operational and life cycle costs, while providing redundancy and saving space.

But it’s not just performance that sets us apart. Our commitment to safety, quality and support has made us the #1 selling tankless brand in the U.S. and Canada.

From products to services and everything in-between, our dedication to exceeding even the highest expectations drives every aspect of our business. When you choose Rinnai, you’re choosing a commitment to excellence.

For more information on Commercial Water Heating Solutions, Maintenance Services and a free sizing consultation by Rinnai Applications Engineers, call 866-383-0707

Trustworthy Products

Start with reliable service

At Rinnai, our commercial water heating solutions are designed and tested to deliver the utmost in performance and dependability. Before our products ever reach customers, they’re rigorously tested at our on-site, CSA-certified laboratory. But just as important as engineering a sound product is offering a strong support system.


  • Application Engineering and Sizing
  • 24/7/365 Tech Support
  • Rinnai Direct Preventative Maintenance Services

Warranty coverage*

For even more peace of mind, the Rinnai Tankless Water Heater commercial warranty includes:

  • 6-year heat exchanger**
  • 5-year parts
  • 1-year labor, extended to 2 years when registered within 30 days of purchase.

* For complete warranty details, visit
** C199 and Demand Duo™