Best Direct Vent Indoor Propane Tankless Water Heater in 2025
Updated on July 2025
#1
Recommended
16% Off
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- Endless hot water
- Very high efficiency
- Compact Space Saving Design
- Low Nox
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- Endless hot water
- Very high efficiency
- Compact Space Saving Design
- Low Nox
#2
Value for Money
5% Off
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- Indoor or outdoor installation with Versa Vent system; compatible with propane or natural gas via Smart Sense gas control system
- Compact design, equivalent to a small suitcase, delivers up to 10 GPM for simultaneous use of 6 fixtures
- Features user-friendly interface, Quick Flush for easy maintenance, and high energy efficiency with a UEF of .98; WiFi control available with Controlr module (sold separately)
- Professional installation is recommended; find qualified technicians through Rinnai's website and use the Rinnai Central App for assistance
- Access product guides, manuals, energy information, and warranty details to determine the suitable tankless water heater size for your home; check regional water temperature compatibility
Read More
- Indoor or outdoor installation with Versa Vent system; compatible with propane or natural gas via Smart Sense gas control system
- Compact design, equivalent to a small suitcase, delivers up to 10 GPM for simultaneous use of 6 fixtures
- Features user-friendly interface, Quick Flush for easy maintenance, and high energy efficiency with a UEF of .98; WiFi control available with Controlr module (sold separately)
Read More
#3
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- 165,000 BTU propane capacity
- Sufficient hot water supply for up to a 4-bath home
- User-friendly LCD control panel with fixed temperature settings
- Includes direct vent dual chamber intake/exhaust system
- 30-day money-back guarantee and 1-year product replacement warranty
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- 165,000 BTU propane capacity
- Sufficient hot water supply for up to a 4-bath home
- User-friendly LCD control panel with fixed temperature settings
- Includes direct vent dual chamber intake/exhaust system
- 30-day money-back guarantee and 1-year product replacement warranty
#4
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- EZ Deluxe Tankless Water Heater with a flow rate of 3.4 gallons per minute (GPM)
- Powered by propane (LPG) gas for efficient heating
- Designed for indoor use to supply hot water for the whole home
- Features a digital display for easy monitoring and operation
- Includes free direct vent exhaust for convenient installation
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- EZ Deluxe Tankless Water Heater with a flow rate of 3.4 gallons per minute (GPM)
- Powered by propane (LPG) gas for efficient heating
- Designed for indoor use to supply hot water for the whole home
- Features a digital display for easy monitoring and operation
- Includes free direct vent exhaust for convenient installation
#5
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- Brand New AQUAH Premium direct vent liquid propane gas tankless water heater
- 3.7 GPM flow rate with a temperature rise of 45°F, thermal output of 28,000 watts (95,600 BTU/h)
- Compact and efficient design suitable for indoor use with thermal efficiency of 88% or higher
- Maintains a constant water temperature regulated by a thermistor to accommodate water and gas flow fluctuations
- Operates automatically, requiring no user intervention
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- Brand New AQUAH Premium direct vent liquid propane gas tankless water heater
- 3.7 GPM flow rate with a temperature rise of 45°F, thermal output of 28,000 watts (95,600 BTU/h)
- Compact and efficient design suitable for indoor use with thermal efficiency of 88% or higher
- Maintains a constant water temperature regulated by a thermistor to accommodate water and gas flow fluctuations
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#6
26% Off
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- Endless hot water supply
- Compatible with Schedule 40 PVC venting
- High energy efficiency rating
- Low nitrogen oxide emissions
- Includes remote thermostat and 6-foot power cord
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- Endless hot water supply
- Compatible with Schedule 40 PVC venting
- High energy efficiency rating
- Low nitrogen oxide emissions
- Includes remote thermostat and 6-foot power cord
#7
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- Provides up to 3.6 GPM and 80,000 BTU for simultaneous use of multiple fixtures.
- CSA certified with essential safety features including dry combustion and overheat protections.
- High-quality copper construction enhances heat transfer and energy efficiency with adjustable heating modes.
- Compact design allows for space-saving installation in various areas of the home.
- Maintains water temperature stability within 1°F for a consistent shower experience.
- Features an LED display for precise temperature control and a memory function for power outages.
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- Provides up to 3.6 GPM and 80,000 BTU for simultaneous use of multiple fixtures.
- CSA certified with essential safety features including dry combustion and overheat protections.
- High-quality copper construction enhances heat transfer and energy efficiency with adjustable heating modes.
- Compact design allows for space-saving installation in various areas of the home.
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#8
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- Heating capacity of 100,000 BTU with a hot water flow rate of 4.3 GPM, providing continuous hot water for 2-3 outlets such as bathrooms and kitchens.
- Four Seasons Function adjusts water temperature based on seasonal changes, with a default setting of 100°F for kitchen use and an adjustable output for bathtubs.
- Eliminates waiting time for hot water, offering immediate access compared to traditional tank heaters.
- Includes exhaust pipe to save additional costs, features an oxygen-free copper water tank to minimize heat loss and energy usage, with standard fittings for easy installation.
- Installation should comply with local regulations and be performed by licensed professionals; not suitable for elevations above 2,000 feet.
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- Heating capacity of 100,000 BTU with a hot water flow rate of 4.3 GPM, providing continuous hot water for 2-3 outlets such as bathrooms and kitchens.
- Four Seasons Function adjusts water temperature based on seasonal changes, with a default setting of 100°F for kitchen use and an adjustable output for bathtubs.
- Eliminates waiting time for hot water, offering immediate access compared to traditional tank heaters.
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#9
10% Off
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- Improved tankless water heater design heats only when needed, conserving energy; features a cleaner internal layout for easier installation and service; LED screen displays service reminders and error codes.
- Compact size equivalent to a suitcase; delivers up to 5.3 gallons per minute, supporting 5 fixtures simultaneously without running out of hot water.
- Versatile design suitable for various spaces; includes a residential guarantee of 15 years for the heat exchanger, 5 years for labor, and 1 year for parts; compatible with Controlr module for WiFi control (module not included).
- Professional installation is recommended; a list of qualified technicians is available on the Rinnai website for installation assistance.
- Access product guides, manuals, energy information, and warranty details to determine the best tankless water heater for your home; check the Ground Water Temperature Map for regional suitability.
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- Improved tankless water heater design heats only when needed, conserving energy; features a cleaner internal layout for easier installation and service; LED screen displays service reminders and error codes.
- Compact size equivalent to a suitcase; delivers up to 5.3 gallons per minute, supporting 5 fixtures simultaneously without running out of hot water.
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#10
5% Off
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- Installable indoors or outdoors with Versa Vent and compatible with both propane and natural gas through the Smart Sense gas control system; requires RX-OVC vent cap for outdoor installation.
- Compact design similar to a small suitcase, delivering up to 9 GPM, allowing multiple fixtures to operate simultaneously.
- Features a user-friendly interface, Quick Flush for easy maintenance, and a high energy efficiency rating of UEF .97; optional WiFi control available with Controlr module.
- Professional installation is recommended; use the Rinnai Central App for setup, service, and troubleshooting assistance.
- Access product guides, manuals, warranty information, and regional suitability through the Ground Water Temperature Map.
Read More
- Installable indoors or outdoors with Versa Vent and compatible with both propane and natural gas through the Smart Sense gas control system; requires RX-OVC vent cap for outdoor installation.
- Compact design similar to a small suitcase, delivering up to 9 GPM, allowing multiple fixtures to operate simultaneously.
- Features a user-friendly interface, Quick Flush for easy maintenance, and a high energy efficiency rating of UEF .97; optional WiFi control available with Controlr module.
Read More
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