More homeowners and business owners choose Rinnai than any other tankless water heater brand. They choose us for our 100-year commitment to quality, for our industry-leading warranties, and because we’re the first major tankless brand assembled in the U.S.A.

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. See if you’re eligible for a rebate.

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 fluctuations — keeping your home consistently comfortable.

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 delivering hot water in up to four places around your home at the same time.

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

The Rinnai Hydronic Air Handler System easily integrates with select tankless water heaters or boilers to deliver energy-efficient warmth.

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. Have a question? Our self-help FAQs may be able to answer your question.

Rinnai condensing boilers are user-friendly and dependable for heating your home and your water. Each model continually adjusts to maximize efficiency and optimize performance — providing comfort you can count on.

For small- to medium-sized new homes or remodels, Rinnai’s high-efficiency models are affordable, compact units you can count on. RE Model Series; REP Model Series; V Model Series

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