10 Best Tankless Water Heaters in 2020 – Water Heater Reviews

Our winners of the Best Tankless Water Heaters in 2020 are:

BEST OVERALL

Stiebel Eltron 224322 Water Heater

Stiebel Eltron 224322 Water Heater
  • Reliable and superior performance
  • Superior technical support
  • Does not require venting
  • The plumbing system is simple and convenient

PREMIUM CHOICE

Rinnai RL Series HE Tankless Water Heater

Rinnai RL Series HE Tankless Water Heater
  • A hot water flow rate of up to 9.4 GOM
  • PL94iN HE high-efficiency tankless water heater
  • Circ-logic technology helps you to set patterns of recirculation that match your typical habits, thus making hot water available whenever you require it
  • Saves energy

GREAT VALUE

Marey GA10LP Propane Gas Tankless Water Heater

Marey GA10LP Propane Gas Tankless Water Heater
  • Works efficiently even when the water pressure is low
  • Controls water temperature
  • Does not require any electrical connection
  • Saves about 60% on electricity bills for water heating

Introduction

The best tankless water heaters are a great help for those people who demand searing hot water throughout their day but also wish to have low electricity bills. The heater has the feature to heat the water as it flows through it. The storage process for water isn’t required in these type of heaters, although some amount of water is present in coil exchange.

Tankless water heaters are installed at more than a single point-of-use throughout the entire household, at a distance from the central water heater. Moreover, you can also get large centralized models installed to cater to the needs of hot water of the entire house. The principal merit of tankless water heater is a continuous supply of plentiful hot water, saving the water in use, less use of physical space, and potential energy savings capability.

Best Tankless Water Heaters

Top 10 Best Tankless Water Heater Reviews & Comparisons

1. Stiebel Eltron Tempra 20 Whole House Tankless Electric Water Heater 223422

Everybody knows that hot showers and a steamy rinse are godsent when you need to relax and freshen up, especially during cold months. If you enjoy doing all your introspective thinking while standing under an uninterrupted stream of hot water, then the Stiebel Eltron 223422 Tempra 20 tankless electric water heater is made for you.

Even when all your family members need to shower at the same time while one washes the dishes, you will be getting the same constant temperature without any fluctuations.

Stiebel Eltron Tempra 20 Whole House Tankless Electric Water Heater 223422

Read Customer Reviews Here »

Why we like it

The temperature of the Stiebel Eltron Tempra water heater can be adjusted as per the demand of the user. The user does not need a remote selector control to make the changes. Moreover, the microprocessor technology guarantees that the temperature of the water does not deviate from its set point.

Features

  • On-demand, continuous and unlimited supply of hot water
  • High-limit switch with manual reset
  • 7-year leakage and 3 years parts warranty
  • 99% efficiency
  • Seismic proof construction
  • The tankless design prevents the growth of Legionella bacteria

Pros

  • Ease of installation and NPT connections
  • Available unlimited supply of hot water
  • Energy saving
  • Reduces the risk of water damage

Cons

  • Power outage
  • Start-up delay

Our Verdict

The Stiebel Eltron 223422 240V water heater is one of the best and easily makes the cut as the best tankless water heater. It is more reliable and efficient than tank water heaters.

2. Rinnai Tankless Water Heater RL Series HE

Guarantee endless hot water for your entire house with the RL series HE Rinnai tankless water heater. The water heater uses natural gas to operate and features a hot water flow rate of up to 9.4 GPM. It comes with a heat exchange warranty for 120 months, 12 months labor warranty, and 60 months parts warranty.

Rinnai Tankless Water Heater RL Series HE

Read Customer Reviews Here »

Why we like it

The Rinnai tankless water heater puts a full-stop to scheduling your hot water requirements. Say yes to efficient savings with superior quality and smart technological features. The tankless water heater makes use of 40 percent less energy than a traditional water heater.

Features

  • Guarantees endless hot water for your entire house
  • Possesses a hot water flow rate of up to 9.4 GPM that can vary as per the temperature of the groundwater
  • Circ-logic technology enables an individual to set patterns of recirculation as per your habits so that you get hot water on-demand
  • Efficient and affordable savings efficiency comes packed in a compact design 
  • The unit uses about 40 percent less energy and conserves water
  • Wi-Fi monitoring system
  • Superior quality

Pros

  • Circ-logic technology
  • An affordable and efficient savings system
  • Consumes less energy
  • Affordable
  • Compact size

Cons

  • Difficult to install
  • Bit bulky
  • Expensive

Our Verdict

The unsurpassed RL unit offers Rinnai’s most innovative technology in tankless non-condensing water heaters. It lets you enjoy energy-saving with an endless supply of hot water. Also, it possesses a recirculation technology and WIFI monitoring system for faster delivery of hot water. A combination of these advantages makes this water heater the best tankless water heater.

3. Marey GA10LP Power 10 Liters 3.1 GPM Propane Gas Tankless Water Heater

Get endless hot water on-demand as per your need while saving up to 60 percent on electricity bills with the innovative technology of Marey GA10LP power tankless water heater. The Marey GA10LP water heater allows the user to control the temperature of the water and is an excellent option for people who experience frequent power outages.

Marey GA10LP Power 10 Liters 3.1 GPM Propane Gas Tankless Water Heater

Read Customer Reviews Here »

Why we like it

The Marey GA10LP water heater comes in a compact design that saves space, is easy to install and supplies unlimited hot water. You can regulate the flow of water, and the temperature of the water can be controlled. It is an excellent alternative for homes experiencing frequent power outages as it does not demand electricity to operate.

Features

  • Saves about 60 percent of electricity bills for water heating
  • The compact design saves space and is easy to install anywhere
  • Does not demand any electrical connection
  • The temperature of the water can be controlled
  • Possesses a capacity of 10 liters
  • Features 3.1 GPM

Pros

  • Allows temperature control
  • Energy efficient
  • Great value for money
  • Does not require electricity to operate

Cons

  • Demand a professional for its installation process

Our Verdict

The Marley GA10LP tankless water heater can offer up to 2.7 gallons per minute of hot water for a refreshing shower at 115 degrees Fahrenheit output water temperature. Moreover, the fantastic features of the water heater come at an affordable price.

4. Ecosmart ECO 11 Electric Tankless Water Heater 13kW With Patented Self-Modulating Tech

Bring efficient water heating technology with the EcoSmart ECO 11 electric tankless water heater. The water heaters possess patented self-modulating technology that enables the users to control the energy output of their units to guarantee optimal heating of water.

Ecosmart ECO 11 Electric Tankless Water Heater 13kW With Patented Self-Modulating Tech

Read Customer Reviews Here »

Why we like it

The unit helps in saving about 60 percent of your electricity bills with its eco-smart technology. The patented self-modulating design and technology offers 99.8 percent efficiency and features an energy factor of 0.98. The ECO 11 is capable of dealing with 2 sinks running at the same time and a shower, in warmer climates.

Features

  • Efficient energy-saving technology
  • Patented self-modulating design and technology allows the individuals to control the energy output of the units to guarantee optimum water heating
  • An excellent option for a small apartment or any small point-of-use application
  • Can heat up to 2 gallons per minute
  • Can deal with 2 sinks and a shower in warmer climates
  • Compact design
  • A digital temperature control system
  • Limited lifetime warranty
  • Possesses easily replaceable components

Pros

  • Compact design
  • Great value for money
  • Digital temperature control

Cons

  • Not suitable for colder regions
  • Not ideal for use in a big house or office

Our Verdict

The smart technology water heater is suitable for climates, where the temperature is not much. The unit can heat up to 2 gallons of water per minute.

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

The Rheem 240V heating chamber RTEX-13 water heater features external adjustable digital thermostatic control with an LED display with an accuracy of +/- degrees. The unit can win the hearts of people due to its reliable and user-friendly performance.

RTEX-13 240V Heating Chamber Residential Tankless Water Heater

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Why we like it

The Rheem 240volts heating chamber water heater offers high-performance along with efficiency. The reliability of the unit is impressive, and it is super easy to install. Its parts can be replaced quickly, and it features a digital temperature display. The most delighting feature of the heater, other than its price, is its flow rate. The 4 GPM flow rate implies that you can run hot water in a low-rated kitchen tap and on s shower at the same time.

Features

  • Adjustable digital thermostatic control with +/- degree accuracy
  • Serviceable self-modulating power control
  • Durable copper immersion dual-heating elements
  • Temperature can be adjusted by external controls 
  • Simple installation

Pros

  • An excellent option for small apartments
  • Simple installation
  • Compact design
  • Economically priced
  • Possess a digital thermostat

Cons

  • Cannot be used in large households or buildings

Our Verdict

The Rheem 240V RTEX-13 water heater is one of the most inexpensive water heaters. It is an excellent water heating solution for studio apartments or those who have a small household.

6. Gasland Outdoors BE158 1.58GPM 6 Liters Portable Gas Water Heater

The tankless water heater by GasLand Outdoors provides multiple protection functions such as anti-freezing protection, flame failure device, over-heating protection to guarantee the safety of the family. The unit offers a maximum power output of 41,000 BTU per hour to supply unlimited hot water as per demand.

Gasland Outdoors BE158 1.58GPM 6 Liters Portable Gas Water Heater

Read Customer Reviews Here »

Why we like it

The GasLand Outdoors gas tankless water heater protects from high water temperatures over 167 degrees Fahrenheit. It can give a fantastic refreshing hot shower even when you are outdoors. Plus, its installation is super easy and convenient and can be done in a couple of minutes.

Features

  • Multiple protection features such as anti-freezing protection, flame failure device, over-heating protection
  • Lightweight and compact design makes it easily portable 
  • Offers hot shower even when you are outdoors
  • Maximum power output is 41000 BTU per hour
  • Energy-saving technology

Pros

  • Energy efficient
  • Can be used outdoors
  • Compact size and lightweight
  • Multiple protection functions

Cons

  • Top and exhaust gets hot sometimes
  • Does not work well when the water pressure is low

Our Verdict

Ensure the safety of your family with the protective features of the tankless water heater BE158 by GasLand Outdoors. It is an excellent water-heating option for people who have kids at their home. Also, if you are a travel freak or like camping, this one would be a perfect outdoor companion for you.

7. Camplux 5L Outdoor Portable Propane Tankless Water Heater

This water heater is portable and has features that look after your hot water needs outdoors. It does not demand electrical supply to operate and, therefore, can be used while camping or when you are in a mood of having your showers outdoors.

Camplux 5L Outdoor Portable Propane Tankless Water Heater

Read Customer Reviews Here »

Why we like it

The Camplux tankless water heater can work even if the water pressure is low. It is approved by CSA, which makes it safe to be used when you have kids at your home. The compact size and the folding handle allow quick and convenient installation.

Features

  • An excellent choice for camping, for family vacations to mountains, and more
  • Oxygen depletion sensor protection 
  • It can be installed indoors if the area is well-ventilated
  • Does not demand electrical power to operate as it is powered by 2 ‘D’ cell batteries
  • Works great even when the water pressure is low
  • When coupled with a 12-volts water pump, it works great on the modified water system
  • Operating with a pressure of propane at 0.4PSI and with 28000BTU per hour maximum power output

Pros

  • Can also be installed indoors
  • Works with low water pressure
  • Compact size
  • Easy and convenient installation

Cons

  • Not recommended to be used for elevations above 2000 feet
  • The water from the heater cannot be used for drinking

Our Verdict

The Camplux water heater provides happiness and enthusiasm to people who are outdoor freaks. Innovation, energy-saving, and portability are the three main elements of the Camplux water heating unit.

8. Stiebel Eltron 074050 DHC 3-1 Single Sink Point-Of-Use Tankless Water Heater

The Stiebel Eltron water heater is a reliable and straightforward hot water solution in a compact size. It can deliver hot water to a single point-of-use; generally, a utility sink or a hand wash. The reliability and simplicity of the Stiebel Eltron DHX tankless water heater makes it a great point-of-use water heater for residential applications.

Stiebel Eltron 074050 DHC 3-1 Single Sink Point-Of-Use Tankless Water Heater

Read Customer Reviews Here »

Why we like it

The Stiebel Eltron water heater is operated by a flow switch that implies that the DHC can never fail prematurely by dry-fire. Also, the DHCs are controlled hydraulically, making the operation quiet. The water heater is equipped with a safety high-limit with manual reset, and the rugged-all copper design of the heater guarantees several years of reliable service.

Features

  • Energy-efficient – consumes up to 50 percent less power 
  • Gives hot water instantly and is available in different kW sizes
  • The unit is controlled hydraulically for quiet operation
  • Lower installation costs
  • Resettable safety high-limit switch
  • An exclusive copper-clad heating element
  • Never fails prematurely due to dry-fires

Pros

  • Unsurpassed reliability
  • Available in different kW sizes
  • Energy efficient
  • Quiet operation

Cons

  • Cannot serve more than one point-of-use

Our Verdict

The Stiebel Eltron DHC tankless water heater is engineered for installation at the point-of-use. The hot water instantaneously flows through the unit and eliminates the standby losses.

9. Eccotemp L10 2.6 GPM Portable Tankless Water Heater

The Eccotemp L10 2.6GPM tankless water heater comes with a 9′ CSA approved hose and a gas regulator that can be used on a standard 20 LB grill style tank. It works on liquid propane and can be installed outdoors as well as indoors, in a properly ventilated environment.

Eccotemp L10 2.6 GPM Portable Tankless Water Heater

Read Customer Reviews Here »

Why we like it

The Ecotemp portable water heater can be installed outdoors whenever you wish to camp, want to give your pet a shower, or your kids want to have an outdoor shower. You can simply attach a garden hose to the unit, and you can enjoy a luxurious hot water bath anywhere.

Features

  • Frustration-free packaging
  • Stainless steel hose and upgraded chrome shower head
  • Great for outdoor showers, washing your pets, and camping
  • Possess an opening range of 20-80 PSI

Pros

  • Easy-to-use temperature controls
  • Lightweight and compact design
  • Safety shut-off timer and safety-tilt switch

Cons

  • Can experience slight delay in water flow

Our Verdict

Whether you wish to camp outside with your family or want to spend a day at the lake or around the pool, sometimes all you need is a nice hot shower that you will get with the Eccotemp L10 tankless water heater. All you need to do is to attach a garden hose, and you are promised luxury and enjoyment.

10. Rinnai V Series HE Tankless Water Heater

Guarantee endless hot water for your entire house with the V53DeN HE high-efficiency tankless water heater with a 5.3 GPM flow rate. It promises reliability and comfort to the user.

Rinnai V Series HE Tankless Water Heater

Read Customer Reviews Here »

Why we like it

The Rinnai V series is a great water heater for outdoor applications. It possesses several innovative and advanced features, such as a timer.

Features

  • High-efficiency water heater
  • Caters to outdoor applications
  • GPM rate of 5.3
  • Mobile app features such as timers help in scheduling the heater for the day

Pros

  • Efficient and affordable
  • Sustainable reliability

Cons

  • Can be used only outdoors

Our Verdict

The Rinnai V series HE waters heater is an excellent combination of comfort, efficiency, and value. It is most suitable for studio apartments.

Best Tankless Water Heater Buying Guide

Tankless water heaters are convenient, energy-efficient, and comfortable means of getting an endless and continuous supply of hot water as per an individual’s need. But the question that arises here is which one should be picked up. Here is a primer that will help you in making the right decision.

Energy Efficiency

In a tankless water heater, the water is heated only at the time when it is being used. Therefore, energy is consumed only when the heater is working. An energy-efficient water heater saves your money but cutting down your electricity bill every month. Before you buy a water heater, you must hunt for the one that features a higher energy factor.

Space

The tankless water heater must contribute towards saving the space of your house by accommodating itself into a smaller space. Investing in a sleek or compact design would be a preferable option.

Longevity

Usually, the lifespan of the tankless water heaters is 20 years. You must go for the one that possesses a longer life span and features replaceable parts that can be replaced easily to extend the life of the filter.

Capacity

Tankless water heater does not have a storage tank for storing hot water. However, the output limits of the tank of tankless water heater restrict the rate of flow of water. The tankless water heaters provide hot water at a rate of 2 to 5 gallons per minute. Thus, you must make sure that the rate of hot water supplied by the water heater falls in this range.

Is it worth your investment?

Before making the purchase, make sure that the price of the unit is per the features that it offers. Also, you must consider the specific needs of your house and your lifestyle before investing in one.

Best Tankless Water Heater FAQs

Does tankless water heater increase home value?

The tankless water heater increases the home value due to increased efficiency and savings, freeing up more real estate, and by exceeding the buying expectations of an individual.

How long does the installation process of a tankless water heater take?

It takes about 2 to 3 hours to install a tankless water heater. However, the process gets a bit less time consuming if the current water tank with a similar system is replaced.

How is the expected life of a tankless water heater last?

The expected life of a tankless water heater is more than 20 years. They possess replaceable parts that extend their life by a couple of years.

Do tankless water heaters need maintenance?

The maintenance of tankless water heaters must be done at least once in a year. Also, your tankless water heater might need some on-demand water heater maintenance every six months if you have hard water or your water heater is set to a higher setting of temperature.

How often should you drain your water heater?

It should be done at least one time in a year.

Conclusion

Before purchasing the best tankless water heater, make sure that you consider all its features and your budget, too. Go for the one that offers the highest efficiency for a prolonged time, is worth the penny, and caters to all your specific requirements.

Last update on 2020-07-19 at 02:03 / Affiliate links / Images from Amazon Product Advertising API

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