15 Best Electric Tankless Water Heater Ranked & Reviewed

In Brief: Best Electric Tankless Water Heater

  1. EcoSmart ECO 27 
  2. Ecosmart ECO 36 
  3. Rheem RTE 13 
  4. Stiebel Eltron Tempra Plus 
  5. Stiebel Eltron 24 Plus Tempra
  6. Stiebel Eltron 230628 
  7. Ecosmart POU 3.5 
  8. Sio Green IR260 POU Infrared 
  9. Titan SCR2 N-120 
  10. Rheem 240V Heating Chamber RTEX-13 
  11. Marey ECO110
  12. Marey ECO180 
  13. Rheem 240V 2 
  14. ECOTOUCH 
  15. Marey ECO150 
How We Decided

26 products considered. 700+ reviews analyzed, 38 research hours spent, 20

More about our Methodology

Water heaters have been a boon for the humans who cringe at the very idea of taking bath in cold water.

Whether it is extremely cold countries like Europe or tropical countries like India, water heaters have been a popular household product for years.

An electric tankless water heater, as the name suggests, runs on electricity and is suited for providing a constant supply of hot water when needed.

The word ‘tankless’ signifies the fact that the water is heated as it is supplied to the heater and passed onto the faucets, without storing it. These are also known as ‘on-demand’ water heaters.

In households where the water consumption is less, a tankless water heater saves 24% to 34% more energy as compared to a storage-tank water heater.

Initially, purchasing a tankless water heater might be slightly costlier than purchasing a tank variety, however, over the long run, the life of the tankless model is longer and it also consumes lesser electricity.

Comparison Table: Top Electric Tankless Water Heaters

Here is a quick comparison table to provide key comparison parameters of top electric tankless water heaters – 

ProductFlow Rate (GPM)Weight (lbs)Energy EfficiencyPrice

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

3 27 50% Check Price

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

6 36 50% Check Price

Rheem RTE 13 Electric Tankless Water Heater

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

4 13 82% Check Price

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control

3.1-6 29 99% Check Price

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater

Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White

2.6-5 24 Check Price

Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use Tankless Electric Water Heater

Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use Tankless Electric Water Heater

.5 - 2.5 12 Check Price

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater

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

0.5 3.5 Check Price

Sio Green IR260 POU Infrared Electric Tankless Water Heater

Sio Green IR260 POU Infrared Electric Tankless Water Heater - 240v / 10A- 30A / 6kW

.8-1.5 6 Check Price

Titan SCR2 N-120 Electric Tankless Water Heater

Titan SCR2 N-120 Electric Tankless Water Heater 220 Volts

1.5-2 11.8 Check Price

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

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

1.5 13 Check Price

Marey ECO110 220V Self-Modulating 11 kW, Small, White

Marey ECO110 220V Self-Modulating 11 kW, Small, White

3 11 98% Check Price

Marey ECO180 18kW 4.4 gpm 220V Self-Modulating Multiple Points Tankless Electric Water Heater

Marey ECO180 18kW 4.4 gpm 220V Self-Modulating Multiple Points Tankless Electric Water Heater for The Whole US Territory, Small, Silver

5 18 Check Price

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

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY

4.4 18 99.80% Check Price

ECOTOUCH Electric Tankless Water Heater

ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White

1.5 5.5 65% Check Price

Marey ECO150 220V/240V-14.6kW Tankless Water Heater

Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology, Small, White

2.5 14.6 Check Price

Table of Contents

The following sections of the article explore a buying guide for picking which is the best electric tankless water heater to buy and how to best use and maintain it.

The article also reviews the top fifteen products in this category.

Reviews Of Best Electric Tankless Water Heater

1.best overall rating

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 is a US-based company dedicated to the manufacturing of tankless water heaters.

Their mission is to produce environment-friendly green products and they have developed a patented self-modulating technology that is made use in all of their offerings to reduce the electricity consumption of the consumers using their products by almost 50%.

Apart from water heaters, they also manufacture pool & spa heaters, water heater booster, and shower heaters. Their products are developed for both residential and commercial applications.

This EcoSmart product boasts of savings of up to 50% costs in terms of water heating. The heater required an activation flow of 0.3 GPM.

The internal body of the heater is made of copper and stainless components for durability and efficiency. It also allows for easy replacement of parts.

The design is sleek and stylish and the body is compact allowing one to fit this heater into tiny spaces. This water heater weighs 16.8 lbs and the dimensions of the same are 17H x 17W x 3.625D inches.

Check out how to install an EcoSmart water heater here :

 

Some of the key USPs of this product is listed below :

  • Digital temperature control in 1-degree increments
  • Patented self-modulating technology
  • Copper and stainless steel components
  • Saves up to 12 cubic feet of storage space
  • Can generate temperature ranging anywhere from 80°F – 140°F
  • Can handle up to 6 GPM
PROS:
  • Capable of heating water as low as 37°F at 3 GPM
  • Limited lifetime warranty offered
  • Highly recommended product by customers
  • Great temperature control
  • Good energy efficiency
  • Budget buy
CONS:
  • Warranty terms could be better

Check Reviews & Price on Amazon

2.best overall rating

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

One can save up to 90% space with this tankless water heater by EcoSmart rated at 36 kW. It gives the user extreme precision over the temperature control by allowing changes as small as 1°F. The heater is designed for higher efficiency and easy replacement.

It comes with a residential use warranty. The flow rate is 6 GPM which is suitable for handling a large single family home. The heater is capable of heating 3.5 GPM at temperatures as low as 37°F.

What this implies is that the unit can comfortably accommodate two showers running at full speed at once.

This heater weighs 18.35 lbs and the dimensions of the same are 17 x 19 x 3.8 inches.

Some of the key USPs of this product is listed below :

  • Digital temperature control in 1-degree increments
  • Patented self-modulating technology
  • Copper and stainless steel components
PROS:
  • Reputed brand
  • The brand manufactures separate remote controller function for temperature regulation
  • Low power consumption
  • Space saving design
  • Long lasting copper components
CONS:
  • Might affect electrical wiring around the house, if not installed correctly

Check Reviews & Price on Amazon

3.best overall rating

Rheem RTE 13 Electric Tankless Water Heater

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

Way back in 1925, Rheem Manufacturing Company was founded by brothers Donald and Richard Rheem in Emeryville, California. Currently, it is headquartered at Atlanta, Georgia, United States.

It is one of the oldest companies in the industry manufacturing a wide range of products like furnaces, water heaters, air conditioners, pool heaters, and HVAC systems. They produce goods for both residential and commercial purposes.

This Rheem tankless water heater features on-unit temperature control. It also has LED lights to indicate active and standby modes.

It requires a standard ½ inch water inlet connection and is equipped with a rugged brass heat exchanger.

The water heater works optimally for a single shower application. It has a maximum flow rate of 4 GPM. The electrical specifications are 13 kW and 240 V. The minimum required activation flow rate is 0.4 GPM.

This heater weighs 7.35 lbs and the dimensions of the same are 7.2 x 7.2 x 7.2 inches.

Some of the key USPs of this product is listed below :

  • Ideal for point of use applications
  • Offers a heat exchange warranty of 10 years
  • Energy Efficient Compact Design – Fits Almost Anywhere
PROS:
  • Great energy savings
  • Easy to install
  • Compact size beneficial for installing anywhere
  • A good temperature control function
CONS:
  • Customer service could be better

Check Reviews & Price on Amazon

4.best overall rating

Stiebel Eltron Tempra Plus 29 kW, Tankless Electric Water Heater

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control

Stiebel Eltron is a Germany based manufacturer of various heating products. It was started way back in May 1924 and is headquartered at Holzminden, Germany.

The different variety of offerings manufactured by Stiebel Eltron include heat pumps, system cylinders, taps, hand dryers, water boilers, electrical heaters, water heaters and a variety of other central heating products.

Water heaters by Stiebel Eltron are known for their proven reliability. The sleek design is compact and fits anywhere easily.

No special ventilation is required for the installation of this model. It allows savings of at least 15% on the electricity bills.

This water heater also features a digital temperature display that allows for the temperature to be set anywhere between 86°F and 125°F.

The heater also has inbuilt sensors that detect the flow rate and desired temperature and apply exactly the amount of pressure needed. The product weighs 10.39 lbs and the dimensions of the same are 16.5 x 4.6 x 14.5 inches.

Some of the key USPs of this product is listed below :

  • Upgraded heavy-duty electronics
  • A simple single flow sensor design
  • A hinged cover for easy access
  • Advanced flow control
PROS:
  • Budget purchase
  • Comes with a residential and commercial warranty
  • Excellent technical support
  • Good temperature control functionality
  • Highly energy efficient
  • Easily able to support multiple faucets
CONS:
  • Professional installation is expensive
  • Product life is a bit short

Check Reviews & Price on Amazon

5.best overall rating

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater

Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White

The Tempra 24 Plus boasts of a sleek and compact design that does not require any venting. It has copper sheathed heating components housed inside a copper body.

The water heater comes with a seven-year leakage and three-year complete parts warranty.

This heater has advanced flow control that varies the flow according to the temperature required by the user. It weighs 1 lb and the dimensions are 4.6 x 16.6 x 14.5 inches.

Some of the key USPs of this product is listed below :

  • Electronic switch activated for virtually silent operation
  • Tested and certified by WQA against NSF/ANSI 372 for lead-free compliance
  • Varying temperature – GPM ratios
PROS:
  • Installation is easy
  • Temperature control feature is good
  • Didn’t impact the electricity bill
  • Good performance of the unit
  • Noiseless operations
  • Quality components
CONS:
  • Copper components have calcium particles breaking off
  • Causes the breaker to trip at times

Check Reviews & Price on Amazon

6.best overall rating

Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use Tankless Electric Water Heater

Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use Tankless Electric Water Heater

This Stiebel Eltron product features a knob on the front cover for enjoying water temperatures ranging from 86°F to 125°F.

A few of the key components of this heater are a safety thermal cut out, a solid copper heating system, an electronic control module, a temperature sensor, a wiring block, and flow sensors.

All these features are packed into a compact design that can be easily concealed in a corner.

The most notable feature of this heater has to be the dual models (9 kW and 12 kW) it offers and these can be configured during the installation.

The heater weighs a meager 5.95 lbs and the dimensions of the same are 4.1 x 7.9 x 14.2 inches.

Some of the key USPs of this product is listed below :

  • Comes with a three-year warranty
  • Features a two in one model – 9kW and 12 kW
  • Comfortable works for single or multiple points of use
PROS:
  • Customers found this to be an easy install
  • Lightweight
  • Maintains consistent temperature throughout usage
  • Requires minimal maintenance
  • Compact, space saver design
  • Highly recommended for residential use
CONS:
  • Technical support could be better

Check Reviews & Price on Amazon

7.best overall rating

EcoSmart POU 3.5 Point of Use Electric Tankless Water Heater

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

One of the notable features of EcoSmart is their multiple product offerings varying according to the inlet water temperature and the type of use in mind.

This water heater is designed specifically for a single point of use application and has a 3.5 kW rating. This ensures minimal power consumption for small uses.

The POU 3.5 is recommended for a single sink at 0.5 GPM in warm climates. The heater is flow controlled and is one of the smallest size models that EcoSmart offers.

The product weighs 4 lbs and the dimensions of the same are 3 x 11 x 6 inches.

Some of the key USPs of this product is listed below :

  • Small sized unit
  • Built especially for a single point of use, small requirement
  • Can heat 0.5 gallons per minute to 105°F
PROS:
  • Installation is straightforward
  • Gives instant hot water
  • Useful for small sinks
  • Works even for single showers in warmer weathers
CONS:
  • Slightly expensive

Check Reviews & Price on Amazon

8.best overall rating

Sio Green IR260 POU Infrared Electric Tankless Water Heater

Sio Green IR260 POU Infrared Electric Tankless Water Heater - 240v / 10A- 30A / 6kW

SioGreen Inc. was founded by Henry Mai in 2008 after a few bad experiences with residential water heaters. The company is solely dedicated to providing innovative and environment-friendly water heaters.

They are based out of Clearwater, Florida, United States.

This Sio Green water heater offers four power levels which are unseen in any other product. It features four power levels and these can be adjusted according to the needs of the user.

It will be able to have a power rating in the range of 1 kW to 6 kW. The temperature can be adjusted with the help of the water flow regulator included with this heater.

The heater is designed with patented technology wherein there are no coil metallic elements for heating. This implies that there will be no corrosion or calcium deposits tend to clog the faucets.

Instead of metal, it is equipped with an instant infrared heating design. The entire unit is very compact and this ergonomic size allows it to be fitted anywhere in the house.

The water heater can be used for residential or commercial purposes. This model, in particular, is recommended to be used with a low flow sink at lower temperatures and at the very maximum, a low flow shower head at higher temperatures.

The heater weighs 6.75 lbs and the dimensions of the same are 14.3 x 12.8 x 4.4 inches

Some of the key USPs of this product is listed below :

  • No metallic components so no corrosion
  • Manual mode with 4 power level from 1 to 4
  • Outlet Thermocouple for constantly monitoring the temperature
PROS:
  • Budget-friendly
  • Anti-corrosion solution
  • Free replacement or money back guarantee within 30 days
  • Easy installation in a wide variety of locations
CONS:
  • Warranty conditions should be better

Check Reviews & Price on Amazon

9.best overall rating

Titan SCR2 N-120 Electric Tankless Water Heater

Titan SCR2 N-120 Electric Tankless Water Heater 220 Volts

Titan Tankless has been in the business of manufacturing tankless water heaters for the past 34 years and they are fully warranted and backed by Niagra Industries.

This Titan electric tankless water heater is recommended in areas with warmer climates where the incoming water temperature is higher than 65. It can easily handle one to three bathrooms.

It is very versatile in the range of requirements that it can fulfill.

The heater has a power rating of 11.8 kW. Some of the other technical specifications of this water heater are 220 Volts, 54 Amps, 50/60 Hz.

The water heater weighs a meager 2 lbs and the dimensions of the same are 12 x 10 x 5 inches.

Some of the key USPs of this product is listed below :

  • Can cater up to three bathrooms comfortably
  • Has a power rating of 11.8 kW
  • Very lightweight
PROS:
  • Reliable
  • Efficient design
  • Compact and light
  • Energy efficient
CONS:
  • Product life should be longer

Check Reviews & Price on Amazon

10.best overall rating

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

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

The electrical specifications of this Rheem water heater are 240 V and 13 kW. The external adjustable digital thermostatic control with the LED display allows for a great level of accuracy while setting the temperature.

It operated using the patented self-modulating power control and has two durable copper immersion heating elements.

The heater comes with a 3-foot electrical cable and ½ NPT adapters. It can boast of being 99.8% energy efficient. It can easily serve a water saver shower head at 1.5 GPM.

The model is designed for aiding in easy replacement and for a simple installation. The water heater weighs 8.5 lbs and the dimensions of the same are 4 x 9 x 13 inches.

Some of the key USPs of this product is listed below :

  • Patented self-modulating technology for advanced temperature control
  • Best suited for residential use
  • 5 years no-leak and 1-year parts limited warranty
PROS:
  • Money saver as it is energy efficient
  • Works well in serving multiple points of application
  • Digital temperature setting allows good precision
  • Heats water fast
CONS:
  • Product life should be longer

Check Reviews & Price on Amazon

11.best overall rating

Marey ECO110 220V Self-Modulating 11 kW, Small, White

Marey ECO110 220V Self-Modulating 11 kW, Small, White

Marey is one company that specializes exclusively in tankless water heaters.

Since 1955, they have been manufacturing the electric and gas versions at affordable prices and the company has its roots in Puerto Rico where it was founded by the entrepreneur Mr. Mariano Reyes.

Apart from brand new products, they also sell parts for tankless water heaters and refurbished heaters.

Another product of German engineering, this Marey tankless water heater is rated at 220 V and 11 kW. It is best suited for usage at two simultaneous positions in US southern regions, provided the water temperature is above 70.

In the colder regions, it is suitable for a sink at 1.3 GPM.

The easy controls on the body of the heater allow even the most minor adjustments to the temperature using an LCD panel.

This is for optimizing the electricity consumption by the heater. For safety reasons, the heater requires a 60 AMP breaker and must be installed by a professional.

This water heater is pegged to maintain 98% efficiency throughout its lifetime. It weighs 7 lbs and the dimensions of the same are 3.1 x 7.5 x 10.8 inches.

Some of the key USPs of this product is listed below :

  • ETL approved tankless water heater
  • Corrosion-resistant heating elements to avoid calcium and chlorine build-up
  • Supports distances up to 40 feet from point of installation
PROS:
  • Good quality, accurate temperature controller
  • Great energy efficiency
  • Good technical support
  • Works as advertised
  • Can manage multiple points of use well
CONS:
  • Professional installation mandatory for proper functioning

Check Reviews & Price on Amazon

12.best overall rating

Marey ECO180 18kW 4.4 GPM 220V Self-Modulating Multiple Points Tankless Electric Water Heater

Marey ECO180 18kW 4.4 gpm 220V Self-Modulating Multiple Points Tankless Electric Water Heater for The Whole US Territory, Small, Silver

This Marey water heater is recommended to be installed by professionals and has a power rating of 18 kW.

The design is German engineered and all the components are made of high-quality stainless steel, including the heating chambers.

The design aids in the optimization of electricity consumption by providing a digital display that allows one to program exact water temperatures.

It can be used for facilitating hot water supply for two shower heads simultaneously at 2 GPM each in hot weather conditions. Alternatively, it works well for a single shower head in colder climates.

The said water heater weighs 18 lbs and the dimensions of the same are 11 x 3.5 x 16.1 inches.

Some of the key USPs of this product is listed below :

  • Uses up to 60% less energy than conventional water heaters
  • Supports a maximum distance of 50 feet to the point of use
  • 100% non-corrosive components
PROS:
  • Works as advertised
  • Comes with a five-year warranty
  • Easy installation
CONS:
  • Slightly heavy
  • Should be necessarily installed by a professional

Check Reviews & Price on Amazon

13.best overall rating

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

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY

This Rheem water heater boasts of an external digital thermostatic control with digital display. This allows one to adjust the temperatures by measures as small as 1.

It operated based on an advanced self-modulation technique that adjusts the power to meet the water flow.

The heating mechanism has two copper immersion elements. The flow rate supported is up to 4.4 GPM. The unit is designed for easy installation and fast replacement if needed.

The heater weighs 8.5 lbs and the dimensions of the same are 4 x 15 x 19 inches.

Some of the key USPs of this product is listed below :

  • 99.8% energy efficiency rating
  • Rated at 18 kW and electrical requirements are 240 volts, and 75 amps
  • On-demand supply of hot water in good volumes
PROS:
  • No clicking relays
  • Silent, efficient operations
  • Easy to install
  • Economical purchase
  • Provides ample supply for multiple points of use
CONS:
  • Slight temperature fluctuation was noticed by users

Check Reviews & Price on Amazon

14.best overall rating

ECOTOUCH Electric Tankless Water Heater

ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White

This Ecotouch electric tankless water heater comes with electrical specifications of 5.5 kW at 240V. It is touted to supply an instant, consistent and endless supply of hot water with a temperature of 116 ℉ or higher.

This implies that there is almost no waiting time for getting hot water and any time needed for preheating.

This water heater boasts of self-adjustment which means that it adjusts power input based on flow rate and temperature setting provided by the user.

The digital display panel which allows for touch inputs for temperature adjustments makes it very easy to use the heater. Some models (eg. the black one) comes with a remote controller which makes it, even more, user-friendly.

It eliminates the need for mixing hot and cold water to get the desired temperature. The device undergoes multiple testing processes and is equipped with small but significant safety features.

The inner water and electricity lines are run separately so as to avoid leakage or harmful build up.

The design is very compact and this allows installation in even the tightest corners which allow the heater to be as close to the point of application as possible.

The heater weighs 6.6 lbs and the dimensions of the same are 15 x 10.4 x 4.9 inches.

Some of the key USPs of this product is listed below :

  • ETL approved model
  • A minimum flow rate of 0.475 GMP to activate the unit
  • Equipped with easy installation brackets, pipe fittings of ½ inch NPT and 10 AWG power cord
PROS:
  • Comes with installation brackets
  • Good technical support for users
  • Rated well for being energy efficient
  • Temperate control feature is helpful
  • DIY model for easy installation
  • The remote controller works well
  • Works as advertised
  • Best value for money
CONS:
  • Some users complained of not getting a regular flow rate

Check Reviews & Price on Amazon

15.best overall rating

Marey ECO150 220V/240V-14.6kW Tankless Water Heater

Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology, Small, White

The electrical specifications of this unit are 220 V to 240 V and it requires a 70 AMP double pole breaker.

This water heater is an example of simple and smart technology in that it allows fine tuning the temperature easily with the help of an LCD panel. This precision goes a long way in helping one to preserve electricity.

Constant temperatures are guaranteed by a flow switch activation mechanism. This enables the unit to maintain consistent temperatures with flows as low as 0.5 GPM/ 5 Psi.

This 10 lbs water heater supports a vertical wall mounting and the dimensions of this unit are 8.7 x 3.5 x 14.2 inches.

The 150 in the ECO150 is descriptive of the power rating which stands at approximately 14.6 kW.

Some of the key USPs of this product is listed below :

  • ETL approved model
  • German-designed patented heating element with a stainless steel water channel
  • Comes with a 5-year warranty
PROS:
  • Rated high in energy efficiency
  • Impressive temperature control
  • Installation is fairly straightforward
  • Budget purchase
  • Good, reliable performance
  • Quality customer service by Marey
CONS:
  • Instruction quality could be better

Check Reviews & Price on Amazon

Buying Guide for Electric Tankless Water Heater

ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White

Buying a tankless water heater for one’s home is a long term investment and therefore, requires careful thought and deliberation.

One has to take into account several parameters to ensure that they end up with the water heater that will best suit their needs and is pocket-friendly.

Following are a few parameters that one should look into before making the purchase.

Purpose of the Tankless Electric Water Heater

Depending upon the usage, there are three broad categories for which a tankless water heater can be used. These are portable, whole house and outdoor categories.

The portable tankless water heaters are useful for traveling purposes. They are very lightweight and can be installed easily to meet very small heating requirements.

For supplying hot water all around the house, in all the sinks, faucets and washrooms, a single tankless water heater can be installed.

There are many sizes available to suit the different requirements that may arise owing to the difference in sizes of the houses.

The outdoor category refers to the tankless water heaters that are installed outside the wall of the bathroom. These are built to stand harsh weather conditions.

Installation Type

Electric tankless water heaters are generally the most flexible in terms of installation. They do not require any special ventilation or pipeline system. They are also the most compact of the various models available.

One can choose from a variety of models according to their usage requirements and the space available.

Energy Efficiency

All the electric tankless water heaters come with energy saving and efficiency rating. It is an indicator of how much electricity one can save by using that product. It usually ranges from 50% to as high as 99%.

This parameter is fast gaining popularity as it not only reduces electricity consumption but is also more environment-friendly.

Environment-Friendliness

Electric tankless water heaters do not have a significant carbon footprint apart from the electricity that they consume.

Having said this, one should keep an eye out for the kW rating of the water heater and stick to the model that will serve their purpose instead of going for a heavy-duty model that will unnecessarily consume excessive power.

Flow Rating

One of the common parameters of measuring the performance of a tankless water heater is the flow rating. This is a measure of the amount of water that the heater is able to heat in terms of gallons per minute.

There are several different models and one can pick according to the number of faucets or outlets, a model suited to one’s needs.

Price

This is one of the last parameters that one should consider but is important if one is on a budget. There are several models available that are pocket-friendly but one would have to skimp on capacity or flow rating.

One should keep this tradeoff in mind while picking a tankless water heater.

Benefits of Electric Tankless Water Heater over Gas Tankless Water Heater

ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White

The following are some of the parameters wherein the electric tankless water heater is a better pick than the gas tankless water heater.

Cheaper buy

A few electrical tankless water heaters might be expensive on the get go but in the long run, they are less cost consuming. Anyone who is purchasing a water heater on a budget, an electrical version is the best option.

More Environment-Friendly

The gas tankless water heater’s primary source of fuel is the natural gas which is already very scarce. This has a significant environmental impact as compared to the electrical heaters that run through electricity.

Limitations of Electric Tankless Water Heater over Gas Tankless Water Heater

The following are a few limitations of the electric tankless water heater as compared to the gas version.

Installation location

Electric tankless water heaters are generally installed inside the house and it is recommended that it be done so.

They are not built to withstand extreme weather condition and are also at risk of malfunctioning if exposed to rough weather condition owing to the sensitive electrical connections.

Any sort of strong winds or rains can seep impurities into the device and damage it.

Added Costs

Although the initial purchase price may be lower, installation of an electric water heater may require installing additional pipelines and a professional might be required to change the wiring.

All these costs are over and above the initial purchase price. These are not incurred in case of gas tankless water heaters, whose installation is much easier and straight forward.

Not very Effective in Cold Areas

The electric water heaters are not very effective in cold climatic conditions. If the temperatures are too low, the heater would not be able to keep up a hot water supply for the entire house.

How to Install and use Electric Tankless Water Heater

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White

One of the key factors to keep in mind is sizing. It should be ensured that the unit can provide the output required.

  • In most cases, the electric tankless water heater will be mounted on the wall first.
  • Once the mounting is complete, the water source will have to be connected to the inlet side of the unit.
  • Another pipe will be connected to the outlet unit to provide hot water for the rest of the house.
  • The next step is to move onto the electrical fittings but before that, all the plumbing connections should be checked and tightened properly.
  • For electrical connections, it is important to use the appropriate wiring for one’s specific unit.
  • The wiring needed will be specified in the manual that comes along with the unit.
  • One end of the wires should be connected to the unit and the other end should be connected to the circuit breaker. There are also pole breakers required.
  • All the connections should be checked carefully before turning on the power to the breaker panel.
  • After all these connections are completed and checked, the cover can be put back onto the unit.
  • The outlet temperature can be set by adjusting the knob on the digital display.

Maintenance of Electric Tankless Water Heater

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

The following are some of the maintenance tips that can come in handy to carry out maintenance procedures for a tankless electric water heater.

  • The electrical connections should be checked regularly to ensure that they are tightly fastened.
  • The plumbing connections should be inspected to avoid any unexpected leakages.
  • An inline filter can be installed to prevent the buildup from hard water from seeping into the faucets.
  • Descaling is another process that should be undertaken periodically. It involves removing all the impurities that have build up inside the linings of the water heater.
  • Another cleaning procedure involves flushing the system with water by connecting a hose to the valves and running the water in the pipes for an hour to remove any buildup using the force of the flushed water.
  • In the previous step, even vinegar can be used instead of water to remove the calcium buildup in the system.
  • Apart from these tips, all water heaters come with a detailed instruction manual that enlists exactly what steps are involved in the annual maintenance of the water heater.

FAQs

Can Electric Tankless Water Heaters be Installed Outside?

For the electric tankless models, it is often recommended that the heaters be installed indoors. However, it may be mentioned on some specific models that it is alright to be installed outdoors. Care should be taken to ensure that the unit is adequately protected from the harsh weather elements since the connections within the heater and the overall build is quite sensitive.

Do Electric Tankless Water Heaters Require Ventilation?

None of the models of electric tankless water heaters have any special ventilation requirements. This is only in the case of a gas tankless water heater.

How do I choose the right electric tankless water heater for me?

It is necessary to take into consideration the following few factors while deciding which model would be best suited to satisfy one’s hot water needs.

  • Number of sinks, faucets, shower heads, taps, etc. to be serviced
  • Frequency of hot water usage
  • Installation location
  • Weather conditions of the area
  • Required temperature
  • Water flow rates

Taking these factors into the decision making will help one in selecting an appropriate water heater from the vast variety of models available and prevent unnecessary costs involved if one were to purchase a lower or higher rated model.

Are Electric Tankless Water Heaters worth it?

Electric tankless water heaters mean a higher initial investment; however, in the long run, the model pays for itself. The tankless models come with a longer warranty and are more energy-efficient. They also save more space in installation. As compared to the gas models, there is no special need for ventilation and the related safety hazards are also significantly less. Keeping all these factors in mind, an electric tankless water heater is definitely worth it.

Is the Electric Tankless Water Heater better than the Tank Version?

Tank water heaters have a higher purchase cost. There is a lot of energy inefficiency involved in terms of heating up the water and storing it without use. The installation costs are higher and a significant amount of rework may be involved as they also require a larger space.

What are the Disadvantages of a Tankless Water Heater?

Some of the noted disadvantages of tankless water heaters as compared to a tank variety are listed below.

  • Generally can’t supply hot water instantaneously
  • Temperatures cannot be maintained consistently
  • They usually draw more electricity to get to the desired temperature quickly
  • Initial installation costs are high

Do Tankless Water Heaters need Maintenance?

It is usually recommended that a tankless water heater be inspected and maintained at least once a year by a professional. However, there are a few scenarios where the maintenance schedule might have to be updated. These are discussed below.

  • Regions that are getting supplied with hard water can damage the water heater by causing a buildup of calcium or chlorine over time. This significantly affects the effectiveness and the lifespan of the water heater.
  • If the water heater is constantly used at high temperatures, it is more prone to buildup.

Therefore, not only for regular maintenance but also for increasing the efficient lifespan of the tankless water heater, regular maintenance is essential.

How much does it Cost to Install a Tankless Water Heater?

The average cost involving the installation of a tankless water heater, including the labor and components, is around $1,500 to $2,000.

Final Words

As can be noted from the various sections of the article and the reviews, there are a lot of brands in the market focused on manufacturing eco-friendly electric tankless water heaters as that is the need of the hour.

One has to take into consideration several factors before making this choice of which tankless water heater to use as it is a big investment and can yield a reliable performance over the years.

Here is the list of our top picks again for you. Check out the specs, customer reviews, price and offers on Amazon –

Last update on 2020-02-17 / Affiliate links / Images from Amazon Product Advertising API

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