Experience endless hot water, superior efficiency, and long-lasting performance with the Rinnai SE Series 7.5 GPM Indoor Condensing Tankless Water Heater – NG. Engineered for reliability and built for modern homes, this ENERGY STAR® certified unit delivers consistent hot water for up to four bathrooms simultaneously, making it ideal for medium to large households.

With advanced Wi-Fi capability, remote diagnostics, and flexible venting options, this model ensures a hassle-free installation and user-friendly operation. Designed to last twice as long as traditional tank-style heaters, it provides exceptional value and performance while reducing energy usage.

Upgrade to a smarter, more efficient hot water solution trusted by homeowners and professionals nationwide.

Key Features:

• Endless Hot Water Supply – Supports 2–4 bathrooms simultaneously
• 7.5 GPM Flow Rate – Consistent performance even during high demand
• Wi-Fi Ready – Optional Wi-Fi module for remote control and monitoring
• Smart Diagnostics – Remote maintenance alerts for optimal performance
• ENERGY STAR® Certified – High-efficiency condensing technology
• Flexible Venting Options – Simplifies installation in most home layouts
• 160,000 BTU Heating Power – Fast and powerful water heating
• Longer Service Life – Lasts 2× longer than standard tank water heaters
• Compact Indoor Design – Saves space and fits utility closets easily
• Uniform Energy Factor (UEF) 0.90 – Helps lower monthly energy costs

What’s Included

• Rinnai SE Series RUCS75iN Tankless Water Heater (Natural Gas)
• Built-in temperature control panel
• Installation manual and user documentation
• Mounting hardware

• Warranty documentation
  

Specifications

Care & Maintenance Instructions

• Inspect and clean the air filter every 6–12 months to ensure proper airflow.
• Flush the heat exchanger annually (or as recommended) to prevent scale buildup.
• Keep ventilation areas clear to maintain efficient operation.
• Check venting and connections regularly for leaks or blockages.
• Use only approved Rinnai accessories and replacement parts for long-term reliability.
• Schedule professional servicing every 12–24 months for optimal performance.