Best 11 Gpm Tankless Water Heater in 2025
Updated on July 2025
#1
Recommended
Free Shipping
- Unlimited hot water flow for the whole home, featuring Circ-Logic for efficient recirculation.
- Compact tankless design saves space and reduces energy consumption by heating water on demand.
- Delivers a hot water flow rate of up to 11 GPM, suitable for simultaneous use of multiple appliances.
- Professional installation is advised; technicians can be located through the Rinnai PRO page.
- Durable construction supported by warranties of 15 years for the heat exchanger, 5 years for labor, and 1 year for parts; Wifi monitoring available with an additional module.
- Meets ENERGY STAR certification with a Uniform Energy Factor of 0.105.
Read More
- Unlimited hot water flow for the whole home, featuring Circ-Logic for efficient recirculation.
- Compact tankless design saves space and reduces energy consumption by heating water on demand.
- Delivers a hot water flow rate of up to 11 GPM, suitable for simultaneous use of multiple appliances.
- Professional installation is advised; technicians can be located through the Rinnai PRO page.
Read More
#2
Value for Money
12% Off
Free Shipping
- Provides immediate hot water supply for whole house, supporting multiple uses simultaneously
- Reduces water wastage with built-in recirculation, saving approximately 11,000 gallons yearly
- Equipped with EcoNet Wi-Fi for remote adjustments and monitoring of energy and water usage
- Space-saving design allows for versatile installation options, including outdoor setup
- Hot-start programming ensures consistent water temperature during consecutive usages
Read More
- Provides immediate hot water supply for whole house, supporting multiple uses simultaneously
- Reduces water wastage with built-in recirculation, saving approximately 11,000 gallons yearly
- Equipped with EcoNet Wi-Fi for remote adjustments and monitoring of energy and water usage
- Space-saving design allows for versatile installation options, including outdoor setup
Read More
#3
Free Shipping
- 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
Read More
- 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
#4
Free Shipping
- Space-saving, energy-efficient tankless design heats water only when needed, reducing energy consumption.
- Delivers 11 GPM hot water flow rate for consistent and powerful performance suitable for commercial use.
- Equipped with Circ-Logic technology for optimized recirculation based on usage patterns; features Wi-Fi for on-demand hot water management.
- Professional installation by a qualified technician is recommended for optimal performance and safety; refer to the Rinnai PRO page to find local installers.
- Includes a robust warranty of 8 years for the heat exchanger, and 5 years for parts and 1 year for labor, ensuring long-lasting reliability.
Read More
- Space-saving, energy-efficient tankless design heats water only when needed, reducing energy consumption.
- Delivers 11 GPM hot water flow rate for consistent and powerful performance suitable for commercial use.
- Equipped with Circ-Logic technology for optimized recirculation based on usage patterns; features Wi-Fi for on-demand hot water management.
Read More
#5
Free Shipping
- 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.
Read More
- 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.
Read More
#6
Free Shipping
- Continuous supply of hot water on demand
- Space-saving design eliminates the need for venting; features two temperature memory presets for easy adjustments
- Requires hard-wiring to 240 or 208-volt electric service, with maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts
- Needs three dedicated 40 amp breakers with 8 gauge copper wiring and a minimum of 200 amp total service for installation.
Read More
- Continuous supply of hot water on demand
- Space-saving design eliminates the need for venting; features two temperature memory presets for easy adjustments
- Requires hard-wiring to 240 or 208-volt electric service, with maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts
Read More
#7
31% Off
Free Shipping
- ON/OFF dial control with adjustable digital temperature display for precise settings
- Self-modulating power control for energy efficiency
- 24kW model delivers a flow rate of up to 5.9 GPM
- Features bottom 3/4" NPT water connections for easy installation
- Provides on-demand and continuous hot water
Read More
- ON/OFF dial control with adjustable digital temperature display for precise settings
- Self-modulating power control for energy efficiency
- 24kW model delivers a flow rate of up to 5.9 GPM
- Features bottom 3/4" NPT water connections for easy installation
- Provides on-demand and continuous hot water
#8
7% Off
Free Shipping
- External thermostatic control with LED display offers +/- 1 degree accuracy
- Self-modulation technology adjusts power according to hot water demand
- Durable copper immersion heating elements with serviceable design; flow rate up to 4.4 GPM
- Bottom 3/4 inch NPT water connections facilitate straightforward installation
- Threaded design allows for easy replacement and includes digital temperature display
Read More
- External thermostatic control with LED display offers +/- 1 degree accuracy
- Self-modulation technology adjusts power according to hot water demand
- Durable copper immersion heating elements with serviceable design; flow rate up to 4.4 GPM
- Bottom 3/4 inch NPT water connections facilitate straightforward installation
- Threaded design allows for easy replacement and includes digital temperature display
#9
12% Off
Free Shipping
- 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.
Read More
- 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.
#10
Free Shipping
- 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
Read More
- 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
Rinnai Outdoor Propane Tankless Hot Water Heater
See All
Aquanta Smart Water Heater Timer
See All
Fogatti 120v 30 Amp Electric Tankless Water Heater
See All
