Best Rinnai Gas Tankless Water Heaters in 2025
Updated on July 2025
#1
Recommended
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- Versatile installation options for indoor or outdoor use with Smart Sense gas control for propane or natural gas.
- Compact size similar to a small suitcase, capable of delivering up to 11.1 GPM to support multiple fixtures simultaneously.
- Efficient design featuring an easy-to-use interface, Quick Flush for maintenance, and high energy efficiency rated at UEF .98.
- Professional installation is advisable; support available through the Rinnai Central App for setup and troubleshooting.
- Comprehensive resources including product guides and manuals available for optimal sizing and performance in different regions.
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- Versatile installation options for indoor or outdoor use with Smart Sense gas control for propane or natural gas.
- Compact size similar to a small suitcase, capable of delivering up to 11.1 GPM to support multiple fixtures simultaneously.
- Efficient design featuring an easy-to-use interface, Quick Flush for maintenance, and high energy efficiency rated at UEF .98.
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#2
Value for Money
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- Circ-Logic technology enables tailored recirculation patterns for efficient hot water delivery.
- Compact design similar to a small suitcase allows for installation in various spaces while providing up to 7.5 GPM, sufficient for 5 fixtures simultaneously.
- Comes with a comprehensive warranty: 12-, 5-, and 1-year guarantees for residential use and 5-, 5-, and 1-year for commercial applications, including heat exchanger, labor, and parts.
- Professional installation is advised; refer to the Rinnai website for finding qualified technicians in your area.
- Access product guides, manuals, and warranty information on the Rinnai website to determine compatibility with your home's needs.
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- Circ-Logic technology enables tailored recirculation patterns for efficient hot water delivery.
- Compact design similar to a small suitcase allows for installation in various spaces while providing up to 7.5 GPM, sufficient for 5 fixtures simultaneously.
- Comes with a comprehensive warranty: 12-, 5-, and 1-year guarantees for residential use and 5-, 5-, and 1-year for commercial applications, including heat exchanger, labor, and parts.
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#3
12% Off
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- Tankless design provides unlimited hot water flow for your home.
- Energy-efficient operation heats water only when needed, reducing energy consumption.
- Delivers up to 7.5 GPM for simultaneous use across multiple appliances.
- Professional installation is advised for optimal performance and safety.
- Comes with varying warranty coverage for heat exchanger, labor, and parts.
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- Tankless design provides unlimited hot water flow for your home.
- Energy-efficient operation heats water only when needed, reducing energy consumption.
- Delivers up to 7.5 GPM for simultaneous use across multiple appliances.
- Professional installation is advised for optimal performance and safety.
- Comes with varying warranty coverage for heat exchanger, labor, and parts.
#4
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- Indoor and outdoor use with both natural gas and propane compatibility
- High efficiency rating of 96%
- Gas control system featuring Smart Sense technology
- Rinnai Central App for setup, service, and troubleshooting
- Simplified flushing process with Quick Flush technology
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- Indoor and outdoor use with both natural gas and propane compatibility
- High efficiency rating of 96%
- Gas control system featuring Smart Sense technology
- Rinnai Central App for setup, service, and troubleshooting
- Simplified flushing process with Quick Flush technology
#5
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- 100,000 BTU heating capacity with 4.3 GPM hot water flow rate, suitable for 2-3 simultaneous water supply points.
- Automatically adjusts water temperature for seasonal changes; kitchen output temperature preset at 100°F; adjustable bathtub output with reminders.
- Provides unlimited hot water instantly, eliminating the 30-minute wait typical of traditional tank water heaters.
- Includes exhaust pipe to save on additional costs and features a copper water tank for reduced heat loss and energy efficiency.
- Installation should comply with local building and plumbing codes and be performed by licensed professionals; not suitable for altitudes over 2,000 feet.
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- 100,000 BTU heating capacity with 4.3 GPM hot water flow rate, suitable for 2-3 simultaneous water supply points.
- Automatically adjusts water temperature for seasonal changes; kitchen output temperature preset at 100°F; adjustable bathtub output with reminders.
- Provides unlimited hot water instantly, eliminating the 30-minute wait typical of traditional tank water heaters.
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#6
10% Off
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- Energy-efficient tankless design heats water only when needed, reducing energy consumption.
- Compact size similar to a small suitcase, delivering a flow rate of up to 6.9 GPM to support multiple fixtures simultaneously.
- Versatile installation options with a 15-year warranty for the heat exchanger and a 1-year warranty for parts.
- Professional installation is advised; qualified technicians can be located via the Rinnai PRO page.
- Access comprehensive product guides, manuals, and warranty information to ensure compatibility with your home.
Read More
- Energy-efficient tankless design heats water only when needed, reducing energy consumption.
- Compact size similar to a small suitcase, delivering a flow rate of up to 6.9 GPM to support multiple fixtures simultaneously.
- Versatile installation options with a 15-year warranty for the heat exchanger and a 1-year warranty for parts.
- Professional installation is advised; qualified technicians can be located via the Rinnai PRO page.
Read More
#7
14% Off
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- Provides continuous hot water supply throughout the home with a compact design
- Energy-efficient, only heats water on demand, suitable for various venting options
- Delivers a high flow rate of up to 7.5 GPM, capable of serving multiple appliances simultaneously
- Professional installation is advised for optimal performance and safety
- Includes a comprehensive warranty covering heat exchanger, parts, and labor
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- Provides continuous hot water supply throughout the home with a compact design
- Energy-efficient, only heats water on demand, suitable for various venting options
- Delivers a high flow rate of up to 7.5 GPM, capable of serving multiple appliances simultaneously
- Professional installation is advised for optimal performance and safety
- Includes a comprehensive warranty covering heat exchanger, parts, and labor
#8
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- Produces continuous hot water on demand with a flow rate of 8.1 GPM and a power output of 180,000 BTU, suitable for multi-point water supply.
- Designed for outdoor installation, featuring an indoor remote control panel and a powerful DC fan to withstand challenging weather conditions.
- Maintains precise water temperature control within 1°F through advanced gas and water adjustment technology, adaptable for all seasons.
- Compact dimensions (26.2" x 17.1" x 7.1") allow for easy installation with standard fittings, requiring minimal space.
- Certified by CSA, this water heater comes with a 2-year warranty for the entire unit and a 5-year warranty for the heat exchanger, providing reliable customer support.
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- Produces continuous hot water on demand with a flow rate of 8.1 GPM and a power output of 180,000 BTU, suitable for multi-point water supply.
- Designed for outdoor installation, featuring an indoor remote control panel and a powerful DC fan to withstand challenging weather conditions.
- Maintains precise water temperature control within 1°F through advanced gas and water adjustment technology, adaptable for all seasons.
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#9
24% Off
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- Provides sufficient hot water for simultaneous use in multiple applications, like showers and dishwashers
- Energy-efficient design operates only when hot water is needed
- Water-saving feature can reduce usage by up to 1,100 gallons annually
- Hot-start programming minimizes the risk of cold water bursts
- LeakGuard technology offers leak detection and prevention to protect against water damage
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- Provides sufficient hot water for simultaneous use in multiple applications, like showers and dishwashers
- Energy-efficient design operates only when hot water is needed
- Water-saving feature can reduce usage by up to 1,100 gallons annually
- Hot-start programming minimizes the risk of cold water bursts
- LeakGuard technology offers leak detection and prevention to protect against water damage
#10
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- Flow rate ranges from 0.4 to 9.5 gallons per minute (GPM)
- Temperature settings adjustable from 100°F to 140°F, with a default of 120°F
- Equipped with electric ignition system
- Backed by manufacturer warranties: 1 year labor, 15 years on heat exchanger, 5 years on parts
- Dimensions: 17-11/16 inches wide
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- Flow rate ranges from 0.4 to 9.5 gallons per minute (GPM)
- Temperature settings adjustable from 100°F to 140°F, with a default of 120°F
- Equipped with electric ignition system
- Backed by manufacturer warranties: 1 year labor, 15 years on heat exchanger, 5 years on parts
- Dimensions: 17-11/16 inches wide
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