Upgrade your home with the Rinnai RE Series 6.6 GPM Indoor Tankless Water Heater, engineered with Smart-Circ™ Intelligent Recirculation™ to deliver continuous hot water exactly when you need it. Designed for exceptional efficiency, this advanced non-condensing natural gas model features a built-in pump, intuitive LED display, compact internal copper heat exchanger, and a clean layout for easier servicing.

Perfect for modern households, the RE Series “learns” your hot-water usage patterns and automatically schedules recirculation, ensuring comfort while reducing energy waste. With 160,000 BTU performance, premium safety features, sleek indoor installation, and a space-saving design, this unit is built for reliable daily use.

Key Features:

• Smart-Circ™ Intelligent Recirculation™ learns water-use patterns for igher efficiency
• Built-in recirculation pump for faster hot water delivery
• LED hscreen for quick diagnostics & system monitoring
• Clean, compact internal layout for easier servicing
• Sliding wall mounting bracket for simple installation
• Safety handle & seating bracket for enhanced stability
• Easy open/close access panel
• Programmable service reminders for optimal performance
• Durable copper heat exchanger
• Optional leak detection & freeze protection available
• 160,000 BTUs for high performance
• Hot water flow range: 0.26–6.6 GPM
• 0.81 UEF (Uniform Energy Factor)
• Natural Gas model – Indoor installation
• Recirculation-ready design
• External controller not required

What’s Included

• Rinnai RE Series 6.6 GPM Indoor Tankless Water Heater
• Built-in recirculation pump
• Wall mounting bracket
• Valve kit
• Installation hardware & documentation

• Recommended (Sold Separately):

  • Isolation Valve Kit – MIVK-T-LW

Specifications

Care & Maintenance Instructions

• Schedule annual maintenance to ensure optimal performance and lifespan
• Keep the unit clean and dust-free, especially around the air intake
• Check for secure connections and ensure proper ventilation
• Use only Rinnai-approved accessories for servicing
• Flush the system periodically to prevent scale buildup (per water hardness)
• Protect against freezing temperatures with the optional freeze protection kit
• Follow all service reminders displayed on the LED screen