Comfort You Can Count On

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.

Condensing Boiler Benefits

How Combination Boilers Work

The Best of Both Worlds

The perfect combination of reliability, technology and performance in one compact unit, a Rinnai I-Series condensing boiler can serve your home heating needs alone or can be combined with a tankless water heater for a dual-purpose home and water heating system.

  • Simultaneous delivery of hot water and home heating without disruption
  • Servo-based bypass control for precision domestic hot water (DHW) temperature control
  • Multiple heating zones possible


The Rinnai I-Series Boilers offer both heat-only and combination models with simultaneous delivery of heat and hot water in one unit.

  • Dual Zone Heating
  • Hot Water Temperature Control
  • Built-in Recirculation for Combination Models
I-Series Boiler


Combination and Heat-Only Boilers

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Protect Your Investment

Installing a condensing boiler system requires a specific knowledge and highly trained skill set you can only get from a professional. Be sure to protect your investment by having your boiler system installed by a certified Rinnai PRO.

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Professional Installation Recommended