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

Rinnai RE Series 5.3 GPM Outdoor NCTWH – NG

The Rinnai RE Series 5.3 GPM Outdoor NCTWH – NG is a high-performance, natural gas-powered tankless water heater. It is designed for outdoor installation and can deliver up to 5.3 gallons of hot water per minute.

This water heater is equipped with advanced features, such as a digital temperature control panel, which allows you to adjust the hot water temperature to your desired setting. It also has a built-in recirculation pump, which helps to reduce wait time for hot water at fixtures and reduces water waste.

The RE Series 5.3 GPM Outdoor NCTWH – NG is energy efficient, with a high energy factor of .82, and meets the Energy Star qualifications for energy efficiency. It is also equipped with a built-in freeze protection system, which helps to prevent damage to the unit in cold weather.

Overall, the Rinnai RE Series 5.3 GPM Outdoor NCTWH – NG is a reliable and efficient choice for homeowners who want an outdoor tankless water heater that can deliver a consistent hot water supply on demand.

Features

• Clean Internal Layout

• LED Screen

• Safety Handle and Seating Bracket

• Easy Open / Close Access

• Programmable Service Reminders

• Compact Copper Heat Exchanger

• Optional Leak Detection Kit

• Optional Freeze Protection

• 140,000 BTUs

• Hot Water Capacity Range:  0.26 GPM to 5.3 GPM

• 0.81 Uniform Energy Factor

• Dimensions:  14.05" x 22.87" x 10.77"

Specification

What Our Experts Think

• Efficient Tankless Design: Provides continuous hot water on demand while reducing energy usage.

• 5.3 GPM Flow Rate: Ideal for small to medium homes with multiple hot-water fixtures.

• Propane Powered: Delivers reliable, energy-efficient performance.

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

Q&A

Q: What is the flow rate of this model?
A: Up to 5.3 gallons per minute, suitable for everyday household hot-water needs.

Q: Does it require indoor venting?
A: No — it’s designed for outdoor installation, which eliminates the need for venting systems.

Q: Is it energy efficient?
A: Yes, the tankless design heats water only when needed, making it more efficient than traditional tanks.

Maintenance Tips

• Flush the unit annually to remove scale and mineral buildup.

• Inspect propane and water connections regularly for leaks.

• Clean exterior to prevent debris from blocking airflow.

• Follow manufacturer servicing guidelines for long-term reliability.