Rinnai Interior 3-Unit Free Standing Rack – Natural Gas | Commercial Hot Water System

Maximize your facility’s hot water output with the Rinnai Interior 3-Unit Free Standing Rack, engineered for demanding commercial and multi-unit applications. Featuring an impressive 97% thermal efficiency and a Uniform Energy Factor of 0.98, this natural-gas system provides a sustainable, cost-efficient solution for properties requiring continuous, high-volume hot water.

With a massive 597,000 BTU maximum input, 33 GPM output, built-in recirculation capability, and Wi-Fi connectivity for smart monitoring, this system is built for long-term performance. The modular design allows for easier maintenance, reduced downtime, and dependable water delivery during peak usage periods. Its ultra-low NOx rating ensures clean, environmentally responsible operation that meets strict SCAQMD standards.

Key Features:

• Ultra-Efficient Performance – 97% thermal efficiency with a 0.98 UEF for maximum energy savings.
• High-Capacity Output – Delivers up to 33 GPM, ideal for large commercial properties.
• Powerful BTU Range – 15,000 BTU (min) to 597,000 BTU (max).
• Natural Gas Operation – Reliable, cost-effective heating for continuous supply.
• Recirculation Ready – Supports built-in recirculation systems for instant hot water.
• Wi-Fi Compatible – Enables smart remote monitoring and system diagnostics.
• Free-Standing Modular Rack – Easy installation and maintenance; replaces traditional boilers.
• SCAQMD Ultra Low NOx Approved – Cleaner operation meeting strict emission standards.
• Ideal for Commercial Use – Perfect for hotels, schools, multi-family buildings, industrial facilities, and hospitality operations.
  

What’s Included

• (3) Rinnai High-Efficiency NG Tankless Water Heater Units
• Heavy-duty Free Standing Rack System
• Factory-assembled gas, water & vent connections
• Integrated recirculation-compatible configuration
• Wi-Fi connection capability
• Installation manual & safety documentation
  

Specifications

Care & Maintenance Instructions

• Schedule annual professional maintenance to ensure peak performance and safety.
• Keep all vents and air intakes clean and unobstructed.
• Inspect for gas, water, or venting leaks regularly.
• Ensure system settings and performance are monitored via Wi-Fi or control interface.
• Avoid storing chemicals, flammable materials, or corrosive agents near the unit.
• Follow all Rinnai-approved guidelines for descaling and system flushing.