I-SERIES+™
A powerful solution that simultaneously provides home heating and domestic hot water for your home. The I-SERIES+ supports multiple thermostats for multi-zone heating so you can heat different areas of your home- providing maximum comfort while saving you money.
Condensing Boiler Benefits
Flexible Options
Choose between heat-only boilers or combination boilers, offering both heating and hot water all in one unit. All boiler series support natural gas or propane.
Comfort & Convenience
Simultaneous delivery of domestic hot water and space heating on all Combi models plus 4 Built-In Zones for better comfort levels and 7 Heating Reset Curves for consistent temperatures.
Smarter is Better
Rinnai boilers include on-board display for easy navigation. Additionally, an outdoor reset sensor continually adjusts to changing temperatures.
How Boilers Work
I-SERIES+™
The Best of Both Worlds
The perfect combination of reliability, technology and performance in one compact unit, a Rinnai I-SERIES+ condensing combi boiler provides unlimited hot water as well as whole-home heating for any sized home.
- Simultaneous delivery of hot water and home heating without disruption
- Provides Significant Energy Savings
- 4 Built-In Zones for Better Comfort Levels
Boiler Model Options
I-SERIES+™
The Rinnai I-SERIES+ Boilers offer both heat-only and combination models with simultaneous delivery of heat and hot water in one unit.
- Consistent temperature control for better comfort levels
- Smart-Circ™ Intelligent Recirculation™ available on combination models
- 96% AFUE efficiency rating
Combi Condensing Boilers | Water + Heat
Solo Condensing Boilers | Heat Only
Professional Installation
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.
Find a PRO