Top 10 Best Tankless Water Heaters in 2018

This post is about 10 best Tankless Water Heaters including their features, details, and efficiency. Reading this will make it easy for you to select your one.

Tankless Water heaters have become the primary requirement of every household as they are instant water heaters. They are best power savers and reduce water wastage to a large extent.

Latest tankless water heaters replace conventional heaters but yet there are so many to choose from. These Tankless water heaters are updated with the newest technology, thus requires a more significant up-front investment but as they are better than conventional and have several benefits, it worth your investment. You can find dozens of these heaters all with different features and varied prices which make selection difficult.

These tankless heaters are excellent for residential purpose and small families, with these heaters you can never run out of hot water supply. With the easy installation process, they are for wall hanging and free up ground space, and bring down electricity and energy consumption by 30%. For the best use, they are connected to wash-basins or dishwashers, or similar applications. Depending on your purpose, your choice may vary, yet these are the best heaters.

Here, is a guide that will help you to determine the best. We have sorted it according to the features and its quality.


Top 10 Best Tankless Water Heaters in 2018

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

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

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About the product

This EcoSmart electric Tankless water heater is designed to heat up 2-gallon per minute and is suitable for the places where climates where the incoming water is 19 0 C or above to heat up water up to 400C. Occupied with a Digital Temperature Control with which you can increase your water temperature up to 1 degree. It can be used for shower and sink all together to save bills. This compactly sized heater is made of Copper and stainless components thus retaining its efficiency.

Design & Quality

  • Dimension – 6.5 x 13.5 x 10 inches
  • Color – white
  • Weight-6.5 pounds
  • Voltage- 240 volts.
 
List of the product’s features
  • 1Kw at 220 is equal to 13kw at 240.
  • Digital 1-degree temperature control.
  • Storage space of up to 12 cubic meters.
  • Self-modulating technology, Lifetime warranty, 50% saving on water heating.
  • Save energy consumption to give continual hot water.
  • The heater requires set of 6 wire, a minimum 125A electrical panel and 60A double. pole breaker while installation.
 

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 9. Eccotemp i12-NG Indoor tankless heater, 1/2 inch NPT water fittings

Eccotemp i12-NG Indoor tankless heater, 1/2 inch NPT water fittings - Tankless Water Heaters

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About the product

The Eccotemp i12-NG tankless water heater has an entirely radical design with touch screen and LED temperature display. It is featured with Safe Electronic ignition system it can be utilized adequately at smaller homes, cottages and vacation cabins. The i12-NG heater, when operated at 3 GPM flow rate, offers 35-40F temperature rise and if run at 1.5 GPM offers 77F temperature rise. It comes with 2-year manufacturer warranty, stainless steel vent kit and 120 volt UL listed power cord.

Design & Quality

  • Dimension – 16 x 16 x 11 inches
  • Color – black
  • Weight- 29 pounds
  • Voltage- 120 volts.
 
List of the product’s features
  • 3 GPM flow capacity
  • Independent gas and water controls
  • Gas rate: 25,000 – 80,000 BTUs
  • Natural Gas Powered
  • Safety, efficiency, and venting options for power ventilation
  • Manual water temperature controls
  • Accurate 1/2 inch NPT water fittings
  • Glossy latest design
  • Fully automatic temperature panels
  • Child locking technology
  • Black acrylic glass casing.
 

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8. Rheem RTEX-13 240V Heating Chamber Residential Tankless Water Heater

Rheem RTEX-13 240V Heating Chamber Residential Tankless Water Heater - Tankless Water Heaters

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About the product

RTEX-13 240V Tankless Water Heater offers quick and sufficient hot water and can be used for multiple applications. Instilled with the latest technology like LED display and temperature controllers, it has longer life-expectancy and an adorable body. With 99.9 energy efficiency, it is perfect for residential use. It has two Durable Copper immersion heating elements. On-field Service option is also available.

Design & Quality

  • Dimension – 4 x 9 x 13 inches
  • Wattage- 13 KW
  • Voltage- 240 volts
  • Weight- 8.5 pounds.
 
List of the product’s features
  • Digital temperature controller, display simple installation and easy replacement, LED display
  • Energy efficient and temperature increments of 1°f
  • Simple installation steps with ½-inch side Compression water connections and 1/2-NPT adapters included with 3-foot electric cable
  • Two Durable Copper immersion heating elements.
 

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7. Rheem RTEX-18 240V 2 Heating Chambers Residential Tankless Water Heater

Rheem RTEX-18 240V 2 Heating Chambers Residential Tankless Water Heater - Tankless Water Heaters

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About the product 

This compact heater can handle shower and faucet at the same time and is supported by the digital dial. It can consume 7gallons of water at a time; all-time women preferred article has a long life-expectancy.  It is to be operated at 40 amp breakers with 8 AWG wire and is good for residential and for the small commercial purpose. It is powered by electricity.

Design & Quality

  • Dimension – 4 x 15 x 19 inches
  • Color – Gray
  • Water consumption- 7 gallons
  • Voltage- 240 volts
  • Weight- 8.5 pounds.
 
List of the product’s features
  • Digital temperature display, simple installation and easy replacement,
  • 3/4 inch bottom NPT water connections lead to Simple installation
  • Field service, Durable Copper immersion heating elements,
  • Developed self-modulation, power adjustment for hot water
  • LED display along with Peripheral digital thermostatic control up to 10 increments.
 

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6. Camplux Pro 26L 6.86GPM Low NOx Outdoor Natural Gas Tankless Water Heater

Camplux Pro 26L 6.86GPM Low NOx Outdoor Natural Gas Tankless Water Heater - Tankless Water Heaters

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About the product

Camplux Pro 26L tankless water heater is equipped with multiple protection systems and innovative combustion technology. Camplex water heater has adjustable temperature 99ºF-140ºF. It can hold water flow up to 0.79 gallons/min. it is meant for outdoor installation with simple and pleasing design features. All time water availability option and a good energy saver. It is powered by natural gas.

Design & Quality

  • Dimension – 23.6 x 15.8 x 7.5 inches
  • Color – White
  • Weight- 50 pounds
  • Size-26L
  • Gas Pressure – 1.5-2.6kPa.
 
List of the product’s features
  • Instantly noticeable energy savor will all time efficient hot water supply.
  • Max Energy Factor of .082 for Natural Gas, rated at an impressive 6.86 GPM and max 180,000 BTU per hour.
  • 120-volt power supply and  6.86 GPM,
  • For an automatic heating, when temperature ranges below 5℃, it has Anti-freezing protection device
  • 3.3ft remote control cable for digital control
  • Low nitrogen oxide emission with an average of 9.5ppm.
 

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5. Eccotemp 45HI-NG Indoor Natural Gas Tankless Water Heater

Eccotemp 45HI-NG Indoor Natural Gas Tankless Water Heater - Tankless Water Heaters

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About the product

It is the largest indoor model. The gas powered tankless water heater can meet all the requirements of hot water for a standard sized house or small commercial purpose. It has a fully automated control system with 4-inch venting which makes it ideal for use. It is compact for wall mounted and is powered by natural gas. It comes with 10-year warranty on heat exchanger and 5-year warranty on parts

Design & Quality

  • Dimension – 22 x 15 x 6 inches
  • Color – White
  • Voltage- 110 volts
  • Weight-38 pounds.
 
List of the product’s features
  • Gas rate: 19,800 – 150,000 BTUs
  • 82% energy saver
  • Integral antifreeze circuit
  • 3/4 inch water and gas inlet & outlet.
  • The flow rate of 3.4GPM at a 70-degree rise, 4.57 GPM at 45-degree rise and 6.8 GPM at 35-degree rise.
  • Installed with Digital display and  simple controls &diagnostics options
  • 4” Venting, 3/4” Gas Inlet, 3/4” Water Inlet & Outlet
  • Ten-year manufacturer warranty of heat exchanger and  five years on parts.
 

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4. Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater

Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater - Tankless Water Heaters

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About the product

Rheem RTG-64XLP Tankless Propane Water Heater is a perfect solution to store plenty of hot water at home. It has a significant design which saves energy and space. It can manage the water flow up to 6.8 gallons/min at 350F maximum and 5.3 gallons/min at 45-Degree F minimum. It is operated with Next Generation Burner Technology having 0.40 GPM Minimum Activation Flow Rate. EZ-Link cable can be used for high demanding applications to link two tankless units for dual functioning.

Design & Quality

  • Dimension – 14 x 10 x 26 inches
  • Weight- 54pounds .
 
List of the product’s features
  • Low Nox Version
  • Propane Tankless Water Heater
  • 6.8 gal/min. at 35F Degree Rise
  • UMC-117 remote control
  • Outdoor use only
  • 10-Feet of thermostat wire.
 

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3. Stiebel Eltron Tempra Plus 24 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control

Stiebel Eltron Tempra Plus 24 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control - Tankless Water Heaters

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About the product

The Tempra Plus tankless water heater is the outcome of advanced technology with instilled Advanced Flow Controller, cover at the center for easy access and single flow sensor design. These heaters have replaced conventional heaters and to cater all the hot water needs of consumers.  It saves energy and also reduces electricity bill. The Compact body occupies less space and is inexpensive as compared to conventional one. It comes with simpler installation option and three-year limited warranty.

Design & Quality

  • Dimension – 21.5 x 19.5 x 8.8 inches
  • Color – Grey
  • Style-Tempra 24 Plus (24 kW)
  •  Weight- 15.4 pounds
  • Voltage- 240 volts.
 
List of the product’s features
  • Save 15-20% of electricity bills
  • Reliable enough with innovative technology
  • Venting not needed
  • Latest sleek designs for easy fitting
  • Temperature controller dial
  • Advanced flow control technology to reduce fluctuations in flow.
 

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2. Takagi T-K4-IN-LP Indoor Tankless Water Heater, Propane

Takagi T-K4-IN-LP Indoor Tankless Water Heater, Propane - Tankless Water Heaters

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About the product

The very new, cost-efficient T-K4-IN Tankless Water Heater is best to be installed indoor with a Direct Vent kit. The water flow is 80gallons/ minute with 0.82 energy factor and gas input of 11000-190000 BTU/h.  This unit can be mounted on the wall and is extremely environmentally friendly and efficient. It can save up to 46% of your gas bills. It has 12 years warranty of heat exchanger and five years of the part. Capable of supplying hot water in 2-3 bathrooms.

Design & Quality

  • Dimension – 8.5 x 13.8 x 20.5 inches
  • Color – White
  • Weight- 43 pounds
  • Voltage- 120Volts.
 
List of the product’s features
  • Wall Mount Drain Pan and Pipe Cover
  • Gas Connectors and water temperature safety control
  • Ball Valves and Pressure Relief Valves
  • Direct-vent conversion optional
  • Flexible Corrugated Water Flexes
  • Max flow rate is 8.0 GPM
  • Electric ignition
  • Indoor installation only
  • Temperature Remote Controller.
 

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1. Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric/Twin Pipe Installation

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric/Twin Pipe Installation - Tankless Water Heaters

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About the product

The product with new condensing technology bought a change in the world of hot water heaters. It is given positive reviews and high ratings by customers. Best energy savers and efficient to use with the water flowing capacity of 9.8 Gallon/Minute. It can be used for both residential and commercial purpose with a temperate range of 98° F to 140° F and 98° F to 185° F. It is operated on natural gas. It offers high flow rate and is highly durable. Come with 12 years warranty for heat exchanger and 5 years for other parts, it is a little bit expensive for its excellent design and technology installation.

Design & Quality

  • Dimension- 10 x 18.5 x 26 inches
  • Weight- 82 pounds
  • Color- Grey
  • Voltage- 120volts.
 
List of the product’s features
  • 199,000 max BTU
  • Ultra low NOx emissions
  • Compact design for easy installation
  • Up to .96 Energy Factor
  • PVC or Concentric venting option
  • 95% Thermal Efficiency Natural gas or propane Indoor Installation.
 

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Conclusion

These are the best ten tankless water heaters, each possesses some qualities, so before selecting the one for you, make sure it meets all your requirement. Also, notice the warranty time and if it will meet all your needs or not. Keep few more essential points in mind while deciding.

  • Need of Hot Water at a time (GPM).
  • How much temperature rise your groundwater requires.
  • Use your required temperature rise and GPM to pick your water heater unit.
  • Look if it is energy saving and check its rating.
  • Life-expectancy and maintenance.
  • Fitting your pocket.
  • If it is electric or gas powered.
  • Make sure your installation meets ventilation requirements.
  • Size, built, design and features.

So what are you waiting for, get the best one today!

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