Rinnai RE Series with Smart-Circ 6.6 GPM Outdoor NCTWH with Recirculation and Pump, NG

Rinnai RE Series with Smart-Circ 6.6 GPM Outdoor NCTWH with Recirculation and Pump, NG

The Rinnai RE Series with Smart-Circ 6.6 GPM Outdoor NCTWH (Natural Gas Tankless Water Heater) is a high-efficiency water heating system that provides an endless hot water supply on demand. It is designed for outdoor installation and features a compact, weather-resistant design.

One of the critical features of this water heater is the Smart-Circ technology, which helps to improve the overall efficiency of the system by recirculating hot water through the pipes to reduce standby losses. This helps save energy and reduces the wait time for hot water at the tap.

In addition to the Smart-Circ technology, this water heater also comes with a recirculation pump and a built-in temperature control system to ensure the water is always at the desired temperature. It has a maximum flow rate of 6.6 gallons per minute, making it capable of simultaneously supplying hot water to multiple faucets or appliances.

The Rinnai RE Series with Smart-Circ 6.6 GPM Outdoor NCTWH is fueled by natural gas and has a maximum input of 199,000 BTUs per hour. It is suitable for use in homes or businesses with high hot water demand and is compatible with standard residential plumbing systems. It is designed for outdoor installation and features a weather-resistant design to protect it from the elements.

Features

• Smart-Circ Intelligent Recirculation

• Clean Internal Layout

• LED Screen

• New Sliding Wall Bracket

• Safety Handle and Seating Bracket

• Built-In Recirculation Control

• Recirculation-Ready Models include Built-In Pump

• Wall Mounting Bracket

• Easy Open / Close Access

• Programmable Service Reminders

• Compact Copper Heat Exchanger

• Valve Kit

• Optional Leak Detection Kit

• Optional Freeze Protection

• 160,000 BTUs

• Hot Water Capacity Range:  0.26 GPM to 6.6 GPM

• 0.81 Uniform Energy Factor

• Dimensions:  14.05" x 22.87" x 10.77"
  

Specification

What Our Experts Think

• Smart-Circ Recirculation: Integrated pump learns your usage patterns and delivers faster hot water while reducing water waste.

• 6.6 GPM Flow Rate: Ideal for small to mid-size homes with multiple hot-water fixtures.

• Natural Gas Powered: Offers efficient, reliable performance with lower operating costs.

• Outdoor Installation: Saves indoor space and eliminates the need for venting systems.

Q&A

Q: What is Smart-Circ technology?
A: It uses a recirculation pump to quickly deliver hot water to fixtures based on learned usage patterns.

Q: Is this unit intended for outdoor installation?
A: Yes — it’s designed specifically for outdoor placement and does not require indoor venting.

Q: How much hot water can it deliver?
A: Up to 6.6 gallons per minute, sufficient for multiple fixtures running at the same time.

Maintenance Tips

• Flush annually to prevent scale buildup and maintain recirculation performance.

• Inspect gas and water connections regularly for leaks.

• Clean exterior vents or air inlets to ensure proper airflow.

• Follow manufacturer servicing guidelines for long-term reliability.