The Rinnai I-Series 150,000 BTU Solo Heat-Only Condensing Gas Boiler (I150SN) delivers dependable comfort with exceptional efficiency. Built for modern homes, this wall-mounted condensing boiler combines powerful performance with a compact, space-saving design.

Featuring a 96.1% AFUE rating, it efficiently converts fuel into heat, helping you lower energy costs while maintaining steady warmth throughout your home. The user-friendly electronic controls make operation simple, and the accessible layout ensures easy servicing.

Compatible with indirect water tanks (sold separately), the I-Series provides flexibility for future expansion. Its durable silver finish, quiet operation, and advanced condensing technology make it an excellent choice for both new installations and upgrades.

Choose Rinnai for long-lasting quality, efficient heating, and trusted performance that enhances home comfort season after season.

Why Choose Rinnai RE180EN?

The Rinnai RE180EN delivers endless hot water, lower energy costs, and superior reliability in a compact outdoor-ready design — making it an ideal upgrade for homeowners who value performance and efficiency.

Key Features:

• Powerful Heating: Provides up to 150,000 BTU output for consistent and efficient heat distribution.
• Energy Efficient: Achieves an impressive 96.1% AFUE, helping reduce energy bills.
• Compact Design: Wall-mounted to save space while maintaining high output.
• User-Friendly Controls: Easy-to-use electronic/IPI control panel ensures simple operation.
• Indirect Tank Compatible: Works seamlessly with indirect water tanks (sold separately).
• Low Maintenance: Engineered for ease of serviceability and long-lasting performance.
• Durable Construction: Finished in sleek silver with high-quality materials for lasting durability.
  

What’s Included

• Rinnai I-Series I150SN Condensing Gas Boiler Unit
• User Manual & Installation Guide
• Mounting Hardware Kit
  (Primary Secondary Heating Kit sold separately)
  

Specifications:

Care & Maintenance Instructions

• Schedule annual servicing by a licensed HVAC technician to maintain peak efficiency.
• Regularly check for vent obstructions or debris.
• Keep the control panel clean and dry—avoid moisture exposure.
• Use only manufacturer-approved accessories and parts.
• Refer to the included Rinnai user manual for detailed maintenance guidance.