What Are The Best Tankless Water Heaters in 2017

So, you have heard about the tankless water heaters, and you are planning to get one because you have heard about its many benefits, Right? Then you know that these tankless water heaters will save you a substantial amount of cash on your utility bills for many years and last longer than the traditional water heaters. Another benefit is that they have the potential to offer unlimited and continuous hot water.

To cut a long story short, tankless water heaters are one of the best investments that every homeowner can style right now. They are incredibly popular, and most industries have cranked out their brands without taking enough time to engineer and build them correctly. This makes it hard to figure out which is the Best Tankless Water Heaters that is worth your money. If you are not careful about the product, you may end up making the wrong decision.

In this guide, we have done extensive research and have five tankless water heaters to recommend. We will help you figure out the best selection for your needs.

Top 5 Best Tankless Water Heaters

01. Rinnai RL75iN Natural Gas Tankless Water Heater

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

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

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The RL75iN is a gas -powered heater that is essential for even large households. Families with two or three bathrooms can be supplied with sufficient water for two or three showers to run at the same time quite quickly. This product provides a maximum water flow rate of around 7.5 Gallons Per Minute, which is quite substantial. The RL75iN comes with an impressive 12-year warranty on the heat exchanger and five years on the parts.

This product is certified by Energy Star meaning that it provides impressive energy efficiency. The Energy Star Certificate proves how able the RL75iN is to efficiently heat water in your house. Another remarkable feature of this tankless water heater is its capability to monitor the input/output water temperatures to maintain a stable heat. This means that there are no temperature instabilities when you have that comforting shower. Saving energy is one of the benefits that this water has, as you can be precise with how warm you want your water.

The RL75iN is a gas operated system. This means that it is slightly more efficient than the electric units, but it will need external venting to enable the gasses to escape. Rinnai is the only producer to give two venting selections on installation.

Key features

  • Natural gas tankless water heater
  • Energy Star Certificate
  • 7.5 Gallons per Minute water flow rate
  • Max/min BTUs: 10,300 to 180,000
  • 82 percent thermal efficiency
  • Comes with MC-91-1US digital controller with error code indicator
  • Residential temperatures settings: 98 degrees Fahrenheit to 140 degrees Fahrenheit
  • Commercial temperature options: 98 degrees Fahrenheit to 160 degrees Fahrenheit. Commercial controller should be purchased separately
  • 12 years warranty on heat exchanger and five years on parts

Pros

  • Serves multiple bathrooms at the same time.
  • High flow rates ideal for large households.
  • Can be converted to propane if you do not like gas.

Cons

  • The tankless water heater requires venting hence increasing the cost for installing the vent.
  • GPM decreases the water temperature rises.

02. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas

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The Takagi T-KJr2-IN-NG tankless water heater is a gas operated system which needs venting to the outdoors. The external venting enables the gasses to escape. The Takagi T-KJr2-IN-NG requires four-inch category III stainless steel venting.

This product comes with two certifications. The first certifications is Energy Star certificate, and it means that the Takagi T-KJr2-IN-NG is acknowledged as one of the more energy efficient units available in the market. The second one is frustration-free certification. The frustration free certificate makes sure that you will not experience any of the hassles or frustrations with the Takagi T-KJr2-IN-NG, which you would experience with others.

This water heater features a high energy factor ranging from 0.81 to 0.83. This means it produces a high level of hot water in contrast to the quantity of energy it uses every single day. The Takagi T-KJr2-IN-NG comes with a warranty of 10 years on the heat exchanger and five years on parts. Note that the warranty is only valid if the unit was mounted by a duly licensed engineer.

This model comes with an impressive 6.6 Gallons per Minute water flow rate. This makes it essential for light residential unusually small apartments units. It performs steadily no matter the climate or season. Homes with two showers will not be a problem for the Takagi to supply sufficient water for the two bathrooms to run simultaneously quite easy.

The Takagi T-KJr2-IN-NG has an impressive component that monitors the water heater, and the temperature of the hot water yielded. With other models, you may realize that the temperature changes during the day and drop below a certain level that you would love. These components both regulates and monitors the water temperatures to make sure that it remains at the settings you selected to keep you from taking baths that are cold or boiling.

The basic design of this model includes heavy duty couplings at the bottom. The linkages make it stress-free to install the water heater in your house and to shut off the unit in case of emergency. You can unscrew all to stop the water flow or power. The Takagi T-KJr2-IN-NG measures 6.7 by 13.8 by 20.3 inches which offer it a more compact size and reduces the amount of room you require to set aside for the water heater.

Key features

  • Natural gas tankless water heater
  • 6.6 gallons per minute
  • Energy factor of 0.81 to 0.83
  • 140,000 BTU
  • Inlet and outlet thermistors for constant temperature monitoring
  • Energy Star Certificate
  • Certified frustration-free
  • Ten-year warranty on heat exchanger and five years on parts

Pros

  • The system heats water efficiently and quickly.
  • Turns itself off if overheating.

Cons

  • Requires venting which increases the installation cost.

03. EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology

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Price

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The ECO 27 is an electric powered water heater that comes equipped with an array of impressive features that can cut your energy bills in half. The water heater features a digital temperature control which is great because it enables you to regulate the temperature of how you like it with the ability to adjust in increments of one degree for the most customized output. You can adjust the temperature between 80 degrees Fahrenheit and 140 degrees Fahrenheit.

The ECO 27 can be used multiple applications depending on your climate. An overwhelming feature of this water heater is its ability to function even in the coldest weather. Most tankless water heaters do not like cold water, but the ECO 27 will operate with as cold as 37 degrees Fahrenheit. At the moment you will not reach the topmost performance level of 6 gallons of water per minute at this temperature, but it will handle better than most tankless water heaters. The ECO 27 can heat 3 gallons of water per minute in temperature as low as 37 degrees Fahrenheit which can handle up to two showers running simultaneously without running out of hot water.

The ECO 27 has 6 gallons per minute maximum flow rate. The water heater can handle up to four showers running at the same time without running out of hot water.

Another impressive feature is the advanced self-modulating technology. It allows the ECO 27 to adjust how much energy is required according to how much hot water us required. The water heater cut down on heat loss saving you up to 50 percent in water heating costs.

The most unusual feature of this tankless water heater is the lifetime warranty on electronics, heat exchanger and elements. The warranty even transfers from one homeowner to another if you sell your house. Installing the ECO 27 will make it easier to sell your home since it raises the market value.

The ECO 27 has a modern design that is slim and attractive. The water heater is made up of high-quality cooper and stainless steel components which are durable, effective and easily replaced. The ECO 27 comes with a UL certificate.

Key features

  • Electric powered tankless water heater
  • Savings of up to 50 percent on water heating costs
  • Digital temperature control in one-degree increments
  • Automatic resettable thermostat
  • Rated for 240 volts and 27 kilowatts
  • Will operate in colder climates
  • Three sets 8 AWG wire required
  • Advanced self-modulating technology
  • 6 gallons per minute maximum water flow rate
  • 99.8 percent energy efficiency
  • CSA and UL certified
  • Dimensions: 17-inche by 17.75-inch by 4.25-inch
  • Weight: 11lbs
  • Lifetime warranty

Pros

  • It is ideal for in the Northern states of the United States and Canada with colder climates that reach as low as 37 degrees Fahrenheit.
  • The unit heats water efficiently and quickly, and also saves energy thanks to its advanced self-modulating technology.
  • The ECO 27 is safe since it has internal jumpers which limit the heat output to a temperature of 105 degrees Fahrenheit. Hence ideal if you have the young children and elderly at home.
  • Easy to clean and maintain.
  • The ECO 27 saves space than the traditional tank water heater that takes up lots of space.Thanks to its sleek wall-mounted design that frees up the floor space for more storage.

Cons

  • The water flow rate is not high enough to make sure seamless, continuous piping hot water throughout a larger home holding five people or more.
  • The lifetime warranty has lots of fine print.

04. Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater

Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater

Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater

Quality

Price

Our rating

The Eccotemp FVI-12-NG tankless water heater is a natural gas powered system designed for small to medium hot water production where you want more than one hot water application simultaneously. The water heater is ideal for cottages, vacation cabins, and smaller homes. The Eccotemp FVI-12-NG comes with a horizontal stainless steel vent kit ready to install.

The Eccotemp FVI-12-NG has an impressive of 110 volts UL listed power cord which powers the digital display and the internal exhaust fan. It only pulls around two watts when it is an idle and 10 watts when it is operating making it perfect when the energy conservation is paramount. The Eccotemp FVI-12-NG provides 45 degrees Fahrenheit temperature during operation at maximum flow capacity and 77 degrees Fahrenheit temperature increase when operating at 2.3 gallons per minute.

Key features

  • Sleek modern design
  • How water capacity: 0.93 to 4.8 Gallons per Minute
  • Maximum/ minimum gas rate: 25,000 to 74,500 BTUs
  • 79 percent energy factor
  • True ½-inch NPT water fittings
  • Digital temperature display with complete independent gas and water controls
  • UL certificate
  • Standard household 120 volts electric outlet required
  • Weighs only 20 pounds
  • Dimensions are 15-inches by 24-inches by 4-inches
  • Two-year limited warranty

Pros

  • Easy to mount.
  • Low energy consumption.
  • Perfect for smaller homes.
  • Portable.

Cons

  • Wouldn’t fit homes with more than one bathroom.

05. StiebelEltronTempra Electric Tankless Water Heater

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater, 240 V, 24 kW

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater, 240 V, 24 kW

Quality

Price

Our rating

The StiebelEltronTempra is an electric powered tankless water heater and the most technologically advanced unit available in the market today. The Tempra features advanced flow control which ensures that there is a steady stream of hot water no matter how enormous the demands are. The temperature fluctuations are not a problem when it comes to Stiebel Eltron Tempra, thanks to its Advanced Flow Control Technology.

The Stiebel Eltron Tempra has a peak water flow of 5.4 gallons per minute. This means that it can be able to handle the hot water of medium to large homes. The Tempra can handle the demands of households with two bathrooms.

Another impressive feature that comes with the Stiebel Eltron Tempra is a digital temperature control. The digital temperature control enables you to adjust the temperature to your level and not waste lots of energy heating the water unreasonably high temperatures. The Stiebel Eltron Tempra is German engineered, and it is an impressive piece of design.

The Tempra is equipped with the latest improvements which include upgraded electronics, flow sensor design, a hinged cover for easy access and advanced flow control system. The advanced flow monitoring system makes sure there a consistent temperature production no matter how high the hot water demand is.

The Stiebel Eltron Tempra does need any outside venting because it is an electric water heater. This makes the installation much simpler than the gas models. Before installing this model, ensure you have power proficiencies at your home to handle a water heater.

The water heater reduces the electric bills and saves energy between 15 to 20 percent kW compared to the conventional tank water heater.

The Stiebel Eltron Tempra is a unit of high quality but doesn’t come cheap. It is one of the best electric tankless water heater available on the market today.

Key features

  • Electric powered tankless water heater
  • Digital temperature control
  • No venting required
  • Saves at least 15 to 20 percent on the hot water portion of your electric bill
  • Gallons per minute water flow rate
  • Advanced flow control technology
  • Slim line design
  • Certified frustration-free certificate
  • Voltage of 240 volts
  • Weighs 15.4 pounds
  • Dimensions are 21.5-inches by 19.5-inches by 8.8-inches
  • Three-year limited warranty

Pros

  • Installation is much simpler and cheaper because it does not require any outside vent.
  • Saves on your electricity bills by enabling the system to run most efficiently while heating the water to optimal temperatures.

Cons

  • Occupies a lot of space.

Tankless Water Heater Buyer’s Guide

Tankless water heaters are also known as on-demand water heaters. The tankless water heaters have become very popular and for a good reason. When you compare tankless water heaters to the traditional tank water heaters, you will realize that they have many benefits over the traditional unit. Here we will take you through what you have to know to make an informed buying decision.

What is a tankless water heater?

Tankless units have become increasingly popular due to their energy competence and compact design. Tankless units are more energy efficient since they heat water only when it is required. The traditional hot water heaters store the hot water in a storage tank and use energy to keep the water warm while waiting to be used.

Let’s put it this way, when you have a tankless water heater, your hot bath is not restricted by the tank size of your water heater. Energy is only used to warm water, not to store and keep water warm meaning that the hot water is provided on-demand, and not sitting in a tank like the traditional water heaters.

How do tankless water heaters work?

Electric and gas tankless water heaters operate in the same way as the traditional water heaters. The only difference is that they can warm the water much more swiftly and can run only when necessary. This means you do not require a storage tank and don’t consume up the energy required during the standby operation.

When the hot water tap is opened, cold water runs into the tankless system. The system senses the water flow and activated the gas burner or the electrical heating element. This, in turn, heats the heat exchanger. The heat exchanger is that part that warms the water. The heat exchanger is enclosed by the incoming cold water which is then heated to the temperature you desire, and ready to be used.

Tankless water heaters are capable of delivering constant hot water supply. However, they are limited by the flow rate of the unit. The flow rate is the amount of water the tankless system is capable of heating at any particular time. The flow rate of a tankless unit is usually measured in gallons per minute based on a particular temperature increase.

If your system has too small of a water flow rate, it will not be able to deliver sufficient hot water the needs of your household. Choosing a large enough system is an informed decision to avoid running out of hot water.

EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

What are the advantages and disadvantages of tankless water heaters

More energy efficient

Efficiency is the measure of heat transfer from the power source to your hot water. Tankless units tend to run at more than 80 percent efficiency compared to the traditional units operating at 67 percent. Tankless water heaters use less energy since they do not have to keep the water at a constant temperature than the conventional units. They work on an on-demand basis. This means that they use just the exact amount of power to the volume of water that is required. The water is not continuously heated and reheated within the storage tank.

Cost efficiency

Tankless water heaters stand out due to their effectiveness, both regarding design and cost. They are cost effective because they use on-demand technology which enables the system to operate only when a hot water valve is opened. When you turn off the valve, the unit shuts off by itself. Estimated savings shows that you can cut your utility bill in half every single month by switching to tankless water heaters.

Saves space

The footprint of tankless water heaters is much smaller, freeing up extra space in your household or garage. Tankless water heaters save space since they mounted on the wall and did not utilize a large water storage tank compared to the traditional unit that has a large reservoir. Since tankless units do not occupy much space, they can fit under your sink, closet, in crawl space or any other small area in your household where there is a space.

Endless hot water

Since the tankless water heaters heat water when needed, it is impossible to run out of hot water. As long as you have a water heater that has water flow rate significant enough to keep up with the demands, then you will run out of hot water.

Longer lasting product

Tankless systems have a longer service life than the traditional water heaters. Tankless water heaters can last 20 years or more with proper maintenance compared to the conventional units which usually last 8 to 12 years. Tankless water heaters are built with high-quality components and materials and are less susceptible to leaks and rust.

Disadvantages

Initial cost - Expect to spend much more money when buying a tankless water heater. They may require some additional work upon installation if you decide to upgrade the existing electrical or gas infrastructure.

Expensive venting – gas powered tankless water heaters need expensive venting material.

Output limitations – they are not a good fit for large homes. If the hot water demands of the households are higher than the unit’s capability, then the system will not be able to provide hot water.

Things to look for when purchasing a tankless water heater

Size

Producers size their water heaters by determining the temperature increase to attain an accurate flow rate. The size you select to go with is dependent on how much you need to warm your water. Find out what the average temperature in your area is and check the temperature of your water yourself. Make sure that you have a size which will heat your water enough to make sure that you do not lose gallons per minute (GPM).

GPM

Make sure that you do not lose hot water when the demand for hot water is high. Calculate how much GPM you require your ideal tankless water to produce.

Gas or Electric

When deciding which kind of heater you want, you have to think about the climate in your area. You require a water heater which will be powerful enough to warm your water if you reside in a cold climate. You can simply get an electric tankless water heater that will deliver you with all the hot water you want throughout the year if you live in a warmer climate.

Conclusion

The EcoSmart ECO 27 is the best water heater. It is an ideal electric tankless water heater for people who live in colder climates. The EcoSmart ECO 27 is powerful enough to heat water for your entire households and to deliver endless hot water supply every time you need it. This tankless water heater is safe and easy to clean and maintain.

I like this tankless water because it takes up little space and saves money. If you are looking for lower-priced tankless water heater which will keep you warm in the bathroom, then EcoSmart ECO 27 is your best bet without a doubt.

Comparison table of tankless water heaters

Brand Model Capacity (GPM) Approx. Size (Inches) Weight (Lbs.) Remote Or Digital control Certification
Rinnai RL75iN 7.5 14 X 9.3 X 23 50 Yes Energy Star
Takagi T-KJr2-IN-NG 6.6 6.7 x 13.8 x 20.3 38 Yes Energy star Certified frustration-free
EcoSmart ECO 27 6 in warmer climates 3 in colder climates 17 x 17 x 13.8 16.8 Yes UL and CSA certified
Eccotemp FVI-12-NG 3.4 4 x 15 x 24 20 Yes UL
Stiebel Eltron Tempra 5.4 21.5 x 19.5 x 8.8 15.4 Yes Certified frustration-free


Megan Ann
 

I’m Megan Ann, mama to 2 and wife to James F. Core. I love meeting new people and hearing their stories. I try to write useful and informative articles to help you as much as I can with my knowledge. Thank you for reading.

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