Upgrade your home’s heating and hot water performance with the Rinnai I-Series 120,000 BTU Combi Condensing Gas Boiler (Natural Gas)—a powerful, compact, and ultra-efficient solution designed for modern comfort. Engineered with advanced condensing technology, this wall-mounted combi boiler delivers exceptional 95% AFUE efficiency while providing consistent whole-home heating and up to 5.1 GPM of domestic hot water.

Built for convenience and long-term reliability, the Rinnai I-Series features user-friendly electronic controls, easy serviceability, and compatibility with indirect tanks. Whether you’re upgrading an older system or installing in new construction, this high-efficiency boiler ensures dependable performance with significantly reduced energy consumption.

Perfect for residential applications, this premium unit includes an LP conversion kit, giving homeowners flexibility during installation. Trust Rinnai’s engineering excellence for a quieter, cleaner, and more efficient home comfort system.

Key Features:

• High-Efficiency Performance: 95% AFUE for reduced energy costs.
• Dual Function: Provides home heating and domestic hot water in one compact unit.
• Wall-Mounted Space-Saving Design: Ideal for tight installation areas.
• 5.1 GPM Hot Water Flow: Reliable hot water output for daily household needs.
• Natural Gas Ready: LP conversion kit included for flexible fuel options.
• User-Friendly Electronic Controls: Simple operation and improved comfort.
• Easy Maintenance & Serviceability: Designed for streamlined access.
• Indirect Tank Compatible: Supports additional hot water storage setups.
• Quiet, Clean, and Efficient Operation: Low energy consumption and reduced emissions.
• Durable Construction: Built for long-term reliability and consistent performance.
  

What’s Included

• Rinnai I-Series Combi Condensing Gas Boiler (120,000 BTU)
• LP Conversion Kit
• User & Installation Manuals
• Mounting Hardware

Note: Primary Secondary Heating Kit required for installation (sold separately).

Specifications

Care & Maintenance Instructions

• Schedule annual professional maintenance to ensure optimal efficiency.
• Keep the boiler area clean, dry, and well-ventilated.
• Regularly inspect venting and air intake for blockages.
• Check pressure and temperature settings periodically.
• Use only approved Rinnai parts for service and replacement.
• Avoid storing chemicals or corrosive materials near the boiler.
• Flush the system as recommended to maintain maximum performance