Rinnai I-Series I090SN Heat-Only Condensing Gas Boiler – Natural Gas

Upgrade your home comfort with the Rinnai I-Series i090SN Heat-Only Condensing Gas Boiler — engineered for efficiency, performance, and space savings. Featuring Rinnai’s exclusive self-cleaning stainless-steel heat exchanger and a secondary flat-plate heat exchanger, this advanced system provides reliable whole-house heating with up to 90,000 BTU of output power.

Designed for natural gas or propane, the I-Series achieves one of the highest AFUE ratings in the industry, ensuring optimal energy utilization and reduced operational costs. Its compact wall-mounted design frees up valuable space while maintaining whisper-quiet performance — making it an ideal solution for modern homes.

Whether you're upgrading from an older boiler or installing a new heating system, the Rinnai I-Series delivers dependable comfort, efficiency, and lasting durability.

Key Features:

• High Efficiency: Delivers up to 90,000 BTU heating capacity with one of the best AFUE ratings in its class.
• Dual Heat Exchangers: Self-cleaning stainless-steel primary and flat-plate secondary exchangers for superior heat transfer and longevity.
• Compact Design: Wall-mounted unit saves space and offers clean installation flexibility.
• Fuel Versatility: Compatible with both Natural Gas and Propane.
• Ultra-Low NOx Emissions: SCAQMD-approved for environmentally responsible performance.
• Energy Star® Certified: Meets rigorous standards for energy efficiency.
• Quiet Operation: Engineered to minimize noise while maintaining consistent heat output.
• Long-Term Reliability: Backed by Rinnai’s advanced engineering and quality assurance.
  

What’s Included

• 1 × Rinnai I-Series i090SN Heat-Only Condensing Gas Boiler (NG)
• Installation manual & user guide
• Mounting hardware kit
• Warranty documentation

Specifications

Care & Maintenance Instructions

• Annual Inspection: Schedule professional service once a year for optimal performance.
• Keep Air Vents Clear: Ensure unobstructed airflow around the boiler unit.
• Check Pressure Regularly: Maintain recommended system pressure levels.
• Clean Exterior: Wipe with a damp cloth — avoid harsh chemicals or abrasives.
• Monitor for Leaks: Inspect connections periodically for gas or water leaks.
• Follow Manual: Always refer to the Rinnai installation and maintenance guide for safe operation.