At Rinnai, our passion for constant improvement drives us to create incredibly innovative products for both home and commercial use. Discover why millions of families rely on their Rinnai tankless water …

Rinnai tankless water heaters last up to twice as long, have twice the warranty, and save energy as they only heat water when it is needed. Consumer financing and rebates are also often available.

Create consistent heat and energy efficiency with Rinnai technology that optimizes gas usage. Each model features advanced modulating technology, which responds to even the smallest temperature …

Whether you have a question about a Rinnai product, need support, or would just like to give us some feedback, we're happy to hear from you.

Built to commercial-grade standards, Rinnai tankless water heaters are backed by the industry's best warranty, and compact enough to fit any space.

Enjoy all the comfort and performance you expect from Rinnai, for less, with our super high-efficiency plus RU models. These compact units are powerful enough to meet your needs, consistently …

Explore all Rinnai brochures, case studies, energy guides, manuals, spec sheets, warranties and more.

How to buy a Rinnai tankless water heater in the U.S. Find a Rinnai PRO near you to get started.

Find your ideal Rinnai tankless water heater system; simply take a few minutes to answer questions about your home and we'll recommend a solution to best fit your needs.

Rinnai tankless water heaters last up to twice as long as tanks and have twice the warranty length. Plus, they save energy by heating water only when it is needed.