Rinnai RE Series 5.3 GPM Outdoor Tankless Water Heater – Natural Gas (RE140EN)

Experience endless, energy-efficient hot water with the Rinnai RE Series 5.3 GPM Outdoor Tankless Water Heater (Natural Gas). Built for durability and performance, this compact yet powerful unit delivers continuous hot water while saving valuable space. Designed with a clean internal layout, LED display, and programmable service reminders, it ensures seamless operation and peace of mind for years to come.

Ideal for outdoor installations, this Rinnai model features a 140,000 BTU copper heat exchanger, optional leak detection and freeze protection, and a non-condensing vent design. Whether for residential or light commercial use, it’s the perfect combination of reliability, innovation, and efficiency.

Key Features:

• Consistent Hot Water Supply: Provides up to 5.3 gallons per minute (GPM) for uninterrupted use.
• Compact Copper Heat Exchanger: Durable, efficient, and space-saving.
• User-Friendly LED Screen: Easy-to-read display with system information and alerts.
• Programmable Service Reminders: Maintain performance with scheduled alerts.
• Optional Freeze Protection: Perfect for colder climates.
• Optional Leak Detection Kit: Add extra protection for peace of mind.
• Safety Handle & Seating Bracket: Enhanced safety and easy access for maintenance.
• Energy Efficient: 0.81 Uniform Energy Factor for optimized gas consumption.
  

What’s Included

• 1 × Rinnai RE Series 5.3 GPM Outdoor Tankless Water Heater (Natural Gas)
• Mounting Bracket & Hardware
• Owner’s Manual & Installation Guide
• Warranty Information

  Note: Isolation Valve MIVK-T-LW required for installation (sold separately).

Specifications:

Care & Maintenance Instructions

• Schedule annual professional maintenance for optimal performance.
• Clean the exterior with a soft, damp cloth — avoid harsh chemicals.
• Check for debris or obstructions near air intake/exhaust.
• In cold climates, consider installing optional freeze protection.
• Use only Rinnai-approved accessories and valves for installation.