Best tankless water heater. Reviews January, 2021

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected]

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Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt

Current price: 140.83 USD

Saving: $48.17 (25%)


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Height: 6 Inches

Length: 3 Inches

Width: 11 Inches

Weight: 4 Pounds

Warranty: 1 Year Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates

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Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

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Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Current price: 541.1 USD

Saving: $107.90 (17%)


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Height: 17 Inches

Length: 3.6 Inches

Width: 21 Inches

Weight: 18.35 Pounds

Warranty: Limited Lifetime Warranty

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display

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Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute

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Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute

Current price: 1127.25 USD


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Height: 23 Inches

Length: 14 Inches

Width: 9.3 Inches

Weight: 50 Pounds

Warranty: Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU

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EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self Modulating Technology

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EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self Modulating Technology

Current price: 203.69 USD

Saving: $65.31 (24%)


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Height: 4 Inches

Length: 12 Inches

Width: 9.5 Inches

Weight: 4.75 Pounds

Warranty: Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable

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Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater, Liquid, White

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Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater, Liquid, White

Current price: 229.99 USD


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Height: 23.6 Inches

Length: 6.9 Inches

Width: 13.6 Inches

Weight: 21 Pounds

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed

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Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

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Search only TAKAGI brand name
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

Current price: 1114 USD


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Height: 22.5 Inches

Length: 10.75 Inches

Width: 17.75 Inches

Weight: 59 Pounds

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Computerized safety features, No pilot light to have to worry about
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation

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EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

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Search only EcoSmart brand name
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

Current price: 210.65 USD

Saving: $66.35 (24%)


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Height: 11.5 Inches

Length: 3.75 Inches

Width: 8 Inches

Weight: 6.5 Pounds

Warranty: Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Computerized safety features, No pilot light to have to worry about
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
  • Patented Self Modulating Technology and design
  • Never run out of hot water with an ECOSMART tankless water heater
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Lifetime warranty

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Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White

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Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White

Current price: 377.1 USD

Saving: $121.90 (24%)


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Height: 17 Inches

Length: 3.625 Inches

Width: 14 Inches

Weight: 14 Pounds

Warranty: Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Computerized safety features, No pilot light to have to worry about
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
  • Patented Self Modulating Technology and design
  • Never run out of hot water with an ECOSMART tankless water heater
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Lifetime warranty
  • 75 A
  • Digital temperature control in 1-degree increments gives users complete control of hot water
  • Save up to 12 cubic feet of storage space.
  • Never run out of hot water with an ECOSMART tankless water heater.
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • Lifetime warranty for residential use
  • Copper and stainless components
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable

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Rinnai V65IN Tankless Water Heater, Large, V65iN-Natural Gas/6.5 GPM

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Rinnai V65IN Tankless Water Heater, Large, V65iN-Natural Gas/6.5 GPM

Current price: 680.4 USD

Saving: $379.60 (36%)


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Height: 26.9 Inches

Length: 14.04 Inches

Width: 9.27 Inches

Weight: 45.6 Pounds

Warranty: Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Computerized safety features, No pilot light to have to worry about
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
  • Patented Self Modulating Technology and design
  • Never run out of hot water with an ECOSMART tankless water heater
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Lifetime warranty
  • 75 A
  • Digital temperature control in 1-degree increments gives users complete control of hot water
  • Save up to 12 cubic feet of storage space.
  • Never run out of hot water with an ECOSMART tankless water heater.
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • Lifetime warranty for residential use
  • Copper and stainless components
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)
  • Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
  • Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
  • V65iN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
  • Endless hot water for your entire home

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Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small

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Search only Rinkmo brand name
Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small

Current price: 349.99 USD


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Height: 17 Inches

Length: 13.12 Inches

Width: 3.12 Inches

  • Connection Fittings 1/2" NPT
  • Amperage Draw 29 amp. kW - 3.5 kW
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • 150 A
  • Required Breaker:4 x 40 A
  • Pipe Fittings:3/4 inch NPT
  • Manufactured in United States
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Sleek and compact design with digital output temperature display
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
  • Residential Temperature Settings: 98°F - 140°F
  • 82% Thermal Efficiency
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 10,300 - 180,000 BTU
  • Activation Flow - 0.3 GPM
  • Heating elements are durable and are threaded for easy replacement
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Works easily with low levels of water pressure
  • Rustproof, no water loss due to leaks
  • Allows water temperature to be controlled
  • 5-year
  • Unlimited hot water whenever is needed
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Compact design saves space and is easy to install almost anywhere
  • Save up to 60% on electricity bills for water heating
  • Provide endless hot water on demand and only as needed
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Computerized safety features, No pilot light to have to worry about
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
  • Patented Self Modulating Technology and design
  • Never run out of hot water with an ECOSMART tankless water heater
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Lifetime warranty
  • 75 A
  • Digital temperature control in 1-degree increments gives users complete control of hot water
  • Save up to 12 cubic feet of storage space.
  • Never run out of hot water with an ECOSMART tankless water heater.
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • Lifetime warranty for residential use
  • Copper and stainless components
  • Manufactured in China
  • The product is easy to use
  • The product is highly durable
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)
  • Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
  • Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
  • V65iN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
  • Endless hot water for your entire home
  • 🚿【Compact Size Save Space】Rinkmo water heater only like a small suitcase, save your space and giving more to your living area. Easy to install and operation, set temp by turning the button, press the button to switch between Fahrenheit/ Celsius.
  • 🚿【Stable Water Temp for Whole House】Our smart modulating technology and formula to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp sensors and flow sensors. No sudden temp changes.
  • 🚿【Stable Water Temp for Whole House 】Our smart modulating technology and formula to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp sensors and flow sensors. No sudden temp changes.
  • 🚿【Save Money Save Cost】No need to preheat before using instant tankless water heater. After using our Rinkmo high efficient water heater, you will find your water Heating Costs Reduce Up to 60%, due to our heater is 99.8% Energy Efficient, you can get hot water within 3s; Create heat without direct contact with metals,No mineral buildup so you don't need to maintenance or fix it and replace the heater coils, No expensive maintenanc cost in the future.
  • 🚿【TIPS】Please notice that the 18KW tankless water heater requires 2 x 40 AMP breakers and 2 x 8 AWG wire, the Min. Water Flow is 0.4GPM/1.5L/min. The 24KW tankless water heater requires 3 x 40 AMP breakers and 3 x 8 AWG wire, and the Min. Water Flow is 0.66GPM/2.5L/min.

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