Best Electric Tankless Water Heater For Large Families & Cold Climates

 Indeed it’s a hectic task to find out the best electric tankless water heater that is ideally suited to your requirements. This article presents unbiased and concurrent electric tankless heater reviews.

These energy efficient heaters meet your hot water needs smartly, take less space because of compact design and do not weigh your pocket by reducing utility bills almost half.

best electric tankless water heater

Keeping your concerns regarding the best rated electric tankless water heater for cold climates, we have compiled the list of top rated electric tankless hot water heater brands depending on the flow rate, temperature rise, power input (BTU) and number of fixtures they can handle at a time. 

Best Electric Tankless Water Heater Reviews – Top Picks

There are numerous models of electric tankless hot water heaters on the market with uncommon features and unique design.

 After thorough research of different models, these electric tankless water heater reviews would enable you to choose the right one, exactly fulfilling your hot water demand.

Image Product Details   Price
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater EcoSmart 36kw Electric Max GPM: 8.7
Wattage: 36kw
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Stiebel Eltron Tempra Plus 36 kW, tankless electric water heater with Self-Modulating Power Technology Stiebel Eltron 36kw Max GPM: 7.5
Wattage: 36kw
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Rheem RTEX-18 18kW 240V Electric Tankless Water Heater Rheem RTEX-18kw 240V Max GPM: 4.4
Wattage: 18kw
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bosch electric mini tank water heater 7 gallon Bosch Electric Mini-Tank Water Heater 7-Gallons Max GPM: 7gallons
Wattage: 1440w
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Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater Rheem RTEX-13 Residential Tankless Water Heater Max GPM: 3.17
Wattage: 13kw
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) Bosch Electric Mini-Tank Water Heater 4-Gallons Max GPM: 4 gallons
Wattage: 1440w
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sio green electric tankless water heater Sio Green Tankless Max GPM: 2.3
Wattage: 9kw
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Titan SCR2 N-120 Electric Tankless Water Heater 220 Volts Titan SCR2 N-120 Electric Tankless Heater Max GPM: 4
Volts: 220V
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Tankless Water Heater Electric ECOTOUCH 9KW 240V on Demand Water Heater Self-Modulating Instant Hot Water Heater ECOTOUCH 9KW on Demand Water Heater Max GPM: 1.5
Wattage: 9kw
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) Bosch Electric Mini-Tank Water Heater Max GPM: 2.5 gallons
Wattage: 1440w
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Best Electric Tankless Heaters Comparison Charts

Below is the list of top best electric water heaters including best quality overall, top value models, top picks, and best budget. 

1. EcoSmart 36kw Electric – Best Electric on Demand Hot Water Heater

Best Electric Tankless Water Heater
  • Endless hot water
  • 99.8% energy efficient
  • Field replaceable elements
  • Advanced self-modulating technology


Power Source: 240V/60Hz Hardwire | Voltage: ‎240 Volts | Wattage: 9000 watts | Amperage Capacity: 50 Amps | Item Weight: ‎‎10.93 pounds| Product Dimensions: ‎15.74 x 10.24 x 2.05 inches | Warranty Description: 1 year warranty | Included Components: ‎8AWG Power Cord, Installation Accessories, Instruction Manual

The EcoSmart Eco36, no doubtedly, is a super cool choice for the large single-family home where hot water is in use from different applications simultaneously. And you never experience running out of hot water. 

Being the best-rated biggest tankless hot water heater, this unit has some awesome features like: 

  • Advanced self-modulating technology, adjusts energy usage automatically depending on the hot water requirements. 
  • Digital temperature control in 1-degree increment controls supply of hot water based on the demand of hot water. 
  • Decent flow rate depends on the external temperature.
  • Energy efficient reduces your utility bills to half. 
  • Compact design makes its installation easiest even in small places. 
  • Recommended breaker is 4 * 40A, means it has the ability to work on low electricity. 
  • Durable and efficient because of the copper and stainless components involved in its making.

Overall, Eco 36 is mainly featured to provide 6GPM at 67°F. Being a 6GPM tankless water heater, it is adequate to run a hot shower, a sink faucet and a dishwasher concurrently.

Moreover, the temperature of outgoing water in the pipes affects the flow rate. If external temperature is low i.e 37 degree F, Eco 36 will heat water nearly 3.5GPM at this low temperature, making this unit an ideal hot water heater for the Northern United States. 

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

If we talk about the Southern United States where large Roman-style homes, jacuzzi tubs and high demand of hot water among multiple fixtures make this unit is the perfect choice because of the temperature comparatively warmer. 

Subsequently, this on demand electric hot water heater ensures a continuous supply of hot water to your kitchen, washroom, and laundry. These qualities make this model the best electric tankless hot water heater.

The company claims that this heater model is upto 99.8 % energy efficient, and does not weigh your pockets for utility bills.   

Furthermore,being an electric tankless hot water heater, to have a good experience with EcoSmart 36, one must know about the requirements essential for this unit. Eco 36 requires pipe fitting of 3/4 inch NPT to draw 240 vaults and to feed 140 amps. 

Before buying one must check the temperature level and demand of hot water, then select the best Eco model accordingly. 


  • Save your money by reducing energy bills, and compact design makes fitting easier.
  • Advanced flow control brings more ease into life.
  • No mechanical switches.
  • Stainless steel and copper elements enhance its durability and lifespan.
  • A Bright LED indicator is useful to understand its functions.


  • Eco 36 will not heat water until the flow rate is more than 0.25gpm.
  • Professional installation requires a warranty.
  • Warranty clauses are too complex to claim.

2. Stiebel Eltron Tempra Plus 36 kW,Best Whole House Electric Tankless Water Heater

electric tankless water heater
  • Proven reliability
  • No venting required
  • Digital temperature control
  • Sleek design fits anywhere


Power Source: Battery Powered | Voltage: ‎240 Volts | Wattage: ‎26000 watts| Amperage Capacity: ‎300 Amps | Item Weight: ‎19 pounds| Product Dimensions:‎16.54 x 4.61 x 14.53 inches | Warranty Description: ‎7 years leakage/ 3 years parts

A 36kw Stiebel Eltron Tempra Plus, is one of the trusted names among the companies manufacturing energy efficient electric on demand water heater. This is a deliberate choice for bigger homes with large families, where endless hot water is in demand for multiple showers along with dishwashing and laundry activities at once. 

Some of the following qualities make this unit an excellent choice for excessive demand of endless hot water. 

  • Integrated with Digital Temperature Control.
  • Reliable and vent-free.
  • 15 – 20 % saving on utility bills, powered by 150A, draws 240 or 208 volts.
  • Automatically reduce water flow rate until power light ends blinking. 
  • Sleek wall-mounted design relieves storage space issues.
  •  Extended warranty: 7 years for leakage defect and 3 years for parts failure.

If we talk about its flow rate, you will be surprised that this unit provides an amazing flow rate at a cheap price. 3.7GPM is a persistent flow rate when the temperature is 42° F, means you can turn on 3 faucets at a time and there will be no shortage in the supply of hot water. 

In addition to this, the performance is even more great when the inlet water temperature is 72°F. It delivers 7.5 GPM, and you enjoy 4 showers and a sink churning out decent hot water. Output water temperature ranges from 86°F to 140°F, relying on the user’s propensity.

Advanced temperature control technology ensures the accuracy in water flow through built-in sensors and increases energy efficiency level which cuts down utility bills to a reasonable percentage. 

This on demand hot water heater electric has special wire requirements and its own installation process, so must check them before buying in order to avoid any hazard in future. This best whole house tankless water heater electric review helps you to get the best model for your to fulfill hot water demand.


  • Durable, long lifespan, rusting resistant, and vent-free.
  • Latest flow control technology alleviates the odious temperature fluctuation.
  • Suitable for multiple water appliances functioning synchronously.
  • Wall-mounted sleek design solves space problems.
  • Energy-efficient helps alleviate energy bills to 15 – 20%.


  • Home electrical upgrade is required as it uses 300AMP, and two 50AMP double pole breakers.
  • Normal maintenance is required. Hard water causes clogs which affect working. Install a water filter to remove contaminants from water before reaching the heater.

3. Rheem RTEX-18kw 240V Electric Tankless Water Heater Budget Tankless Choice

tankless electric water heater
  • Digital thermostatic control
  • Advanced self-modulation technology
  • Durable Copper immersion
  • Easy replacement


Power Source: Battery Powered | Voltage: ‎240 Volts | Wattage: ‎18000 watts | Amperage Capacity: 40 amp| Item Weight: ‎14.8 pounds| Product Dimensions: ‎18.25 x 3.5 x 14.5 inches | Warranty Description: Limited Lifetime Warranty | Included Components: ‎Fittings, Aerators

Rheem RTEX-18 is an excellent decision for the average need of endless hot water on demand. It is best suitable for middle-sized homes where rarely multiple applications are being used at once. 

This inline electric water heater has some outstanding qualities which make it different from other on-demand electric tankless heaters. Furthermore, this Rheem tankless electric water heater earned the “ Amazon Choice” title because of provides premium features at a low price. 

The following features makes this unit a top model on-demand electric water heater:

  • Digital thermostatic control ensures 1-degree accuracy with LED display.
  • Integrated with the latest self-modulation technology, enables this unit to fulfill the hot water requirement smoothly.  
  • Steel and copper immersion increases its durability. 
  • Easy installation and replacement, digital temperature display.
  • Bottom 3/4   inch NPT water connection required
  • 18 kw, 240 volts and 75 amps are electrical requirements.

This unit has double traits: can be used as a point of use and a whole house tankless heater either relying on the hot water demand. This is the best tankless electric water heater if you have a relatively small family and do not require multiple faucets running at the same time. 

According to the company’s statement, this inline hot water heater provides 4GPM for cold inlet water. But the real users found 3GPM or 3.5GPM with cold incoming water, and 3GPM is a really awesome flow rate to fulfill hot water demand. 

For better performance, upgrade your electrical fitting. Use 8AWG suggested wire for dual 40 amp circuit breakers. It has two heating chambers (normally heaters use one) and 18kw power quality to produce an ample flow rate up to 3.5GPM. 

Two heating elements

Together with this, this product is up to 99.8% energy efficient, which means energy saver alleviates electric bills. Also, digital temperature control helps you to set your ideal temperature for water with 1°increment drawing up from 80°F to 140°F. It is one of the best tankless electric water heaters for the whole house with a low budget.


  • No need for electrical up-gradation, also runs on max,75 A grid, 240volts.
  • The trouble-free installation and replacement process make it user-friendly.
  • The involvement of copper immersion enhances its lifespan.
  • Advanced self-modulation technology regulates the required temperature and power.


  • Not suitable to supply continuous hot water for a couple of fixtures running simultaneously.
  • Error comes if you do not open all the appliances before operating the unit.

4. Bosch Electric Mini-Tank Water Heater 7-Gallons Small Tankless Electric Water Heater

tankless water heater electric
  • Quality for Long-Life
  • Great for small spaces
  • 7 Gallons point-of-use mini-tank
  • Minimize wait time for hot water


Power Source: Battery Powered | Voltage: ‎120 Volts | Wattage: 1440 watts | Amperage Capacity: 20 Amps | Item Weight: ‎29.5 pounds| Product Dimensions: ‎10 x 10 x 16 inches | Warranty Description: ‎6-year warranty on unit, 2-year warranty on parts | Included Components: ‎‎Rough Plumbing, Parts, and Repair

Bosch is a renowned company providing robust small electric hot water heaters to fulfill the instant demand for hot water. The surprising fact is the awesome capacity of hot water at a low price.

Bosch Electric Mini-Tank is the best choice to be used as a point-of-use water heater. Installation of hot water lines to every fixture demands a lot of money and time. Bosch mini point-of-use tank is the fit solution to this costly problem. It efficiently supplies hot water instantly where it is needed. 

It has the capacity to provide 7-gallons of hot water to any single water appliance. This mini tank heating capacity of 1440 watts allows the 7 GPM flow rate at temperature ranges from 65 to 145°Fahrenheit. Definitely an admirable mechanism of Bosch Troni 3000 models. This model can be a good addition to the main hot water heater system of your house. 

It is used as a supplement to an existing water heater located remotely.

Insulation of this inline electric water heater is outstanding because of the glass-lined material.That is why, the thermal efficiency of this unit is 98%. Built-in pressure relief valves enhance safety. 

 The standby loss of this unit is very limited And saves energy.  Longer lifespan and durability are the impressive features of this small electric hot water heater.

This unit can be used in multiple ways: 

  • It can be used as an individual water heating source for a single fixture.
  • Can be used as an addition to an existing water heater located far from a sink.
  • Can be operated as a cushion installed in-line with a tankless water heater to save you from experiencing the cold water sandwich during a hot shower.

 This is a versatile model that easily blends with the exterior location of any house because of this stylish appearance. This unit is wall-mounted, floor-mounted, and even can be placed under the sink or even in a cabinet Because of the compact size and Stylish design.   Also gives you the option to place it vertically or horizontally as per your requirement.

 Sadly to know that this unit entertains one person at a time. This unit cannot meet the high demand for hot water because of its Limited capacity.


  • Lightweight and budget-friendly model.
  • Thick CFC-free foam insulation for increased energy efficiency.
  • Glass-lined tank for durability.
  • A great choice for Small Spaces.
  • Straightforward installation process.


  • Only suitable for small homes because of limited water flow.
  • Warranty is a bit complicated.

5. Rheem RTEX-13 Residential – Electric Instant Water Heater For Small Families

electric on demand water heater
  • Simple installation
  • Digital temperature display
  • Self-modulating power control
  •  Residential Tankless Water Heater


Power Source: Battery Powered | Voltage: ‎240 Volts | Wattage: ‎13 KW | Amperage Capacity: 60 Amps | Item Weight: ‎‎0.01 ounces| Product Dimensions: ‎‎12.63 x 8.25 x 3.63 inches | Warranty Description: 5 years for the heating chamber and 1 year for parts | Included Components: ‎1/2 NPT adapters included

If you are looking for an on-demand water heater electric that can handily meet the average household hot water demand with a limited budget. Then Rheem RTEX-13 is an all-in-one solution. 

Likewise, this unit is equipped with fantastic techniques to control the external temperature with a 1°F increment as an automatic consequence. 

Technical specifications of this unit include:

  • Digital thermostatic control with LED screen to display the ongoing temperature.
  • Contains 1/3 NPT adapters, 1/2 inch compression water connections.
  • Flow rate upto 3.17GPM
  • Requires less electric panel: 18kw, 54 A, 240volts, 6AWG recommended wire size
  • Self-modulating power control, field serviceable and simple replacement.
  • Copper immersion two heating elements ensures durability.

The benefits that come with this model are numerous and surprising. As it does not panic for the electric upgrade for better performance. It functions well with only 1 x 60A @ 240volts breaker and 6 no. cable.

If we talk about its potential capabilities, the Rheem instant water heater solely runs on electricity and is 99.8% energy efficient. So, this unit is pocket-friendly for its users as it decreases 30% on their utility bills.

The maximum flow rate is 3.17GPM relying on the temperature rise. For optimal performance, install a water saver shower head with a flow rate of around 1.5GPM. Through external thermostatic features, you can adjust the suitable level ranges from 80°F to 140°F, and this is visible on the LED display screen. 

Its self-modulating feature not only helps save electricity but also ensures the delivery of consistent output making it an instant water heater for shower. Twin heating elements heat water quickly as per demand. 

Durable copper is used in its manufacturing which enhances the longevity of the model. The user experience of this model is simply amazing due to the smooth-running features. That is why it is counted as the best model.

This unit is coupled with a 3-feet electric cable, 1/2 NPT adapters, and side 1/2 compressions for water connection. The installation process is easy-breezy and finishes in less than 1 hour if you are not a noob. 

Sadly, this tankless electric water heater may not be the perfect choice for the residents living in the Northern US, where the temperature is extremely cold. But a smart fit for tropical or warm-weather locations like Florida, Hawaii, or Texas. And you may enjoy 3GPM, which is sufficient to run two fixtures at the same time.


  • Super energy efficient.
  • Threaded for easy replacement.
  • Ultra-compact design fits easily.
  • Spectacular model at an affordable price.
  • Precise control with a large temperature range.


  • Low performance in extremely cold weather.
  • Not suitable with large showerheads.

6. Bosch Electric Mini-Tank Water Heater 4-Gallons Best Point-of-use Water Heater

best electric tankless water heater
  • Long-Lasting quality
  • Multiple mounting options
  • Premium glass-lined material
  • Eliminate Time for Hot Water


Power Source: Battery Powered | Voltage: ‎‎120 Volts | Wattage: 1440 watts | Amperage Capacity: 15 Amps | Item Weight: ‎‎17.3 pounds| Product Dimensions: ‎13.75 x 13.5 x 13.75 inches | Warranty Description: 6-year warranty on unit, 2-year warranty on parts | Included Components: Rough Plumbing, Parts, and Repair

Everyone is not in need of a large electric instant water heater. For a single person, a big tankless hot water heater is useless. Therefore, Bosch T 4-gallon is the ideal choice for less hot water demand. 

It is designed to deliver 4-gallons per minute. The best place to fit this mini water is exactly near the water application where instant hot water is needed. This electric point-of-use water heater can be used as an add-on to your existing large tankless water heater to boost the hot water demand.  In addition to this, this model is portable and perfectly fit to be used as RV tankless heater.

It can also be used as a buffer with an installed heater to avoid cold water shocks during hot water.

Glass-lined features boost performance to maximum whereas solid construction enables the unit to endure load and stress frequently. CFC-free foam insulation maximizes energy efficiency and ensures quality for long life.


This mini electric on-demand water heater provides hot water immediately and reduces waiting mode to access hot water. 

Equipped with 36, 37 inches cords that plug into 120 volts outlets making the self-reliant installation process much easier. Also can be attached to in-line hot water sources easily. 


  • Versatile installation and usage.
  • Self-reliant installation process.
  • Robust model with 98% thermal efficiency.
  • Terminates long waits for hot water.
  • Premium material enhances durability.


  • Limited usage ( for one sink only).
  • May leak if not installed properly.

7. SioGreen IR288 Electric Hot Tankless Water Heater Energy Efficient Inline Model

best electric tankless water heater
  • Corrosion-free
  • Patented technology
  • No coil metallic elements
  • No more maintenance required


Power Source: AC | Voltage: ‎240 Volts | Wattage: ‎9 KW | Amperage Capacity: 10A-40A | Item Weight: ‎10.21 pounds| Product Dimensions: ‎‎17.3 x 11 x 3 inches | Warranty Description: 10 years on elements and 3 years on part | Included Components: Bracket Mounting, Gaskets

To find out the top electric water heater tankless is a matter of contemplation. In fact, multitude of brands of tankless water heaters produce multiple models of electric water heaters to satiate the instantaneous demand for hot water. This article will help you to choose the ideal model that intelligently meets your requirements. 

With startling features, Sio Green IR288 is the ultimate option for the areas with hard water. Also,  they are a perfect choice for an RV or point-of-use water heaters. 

Being a slim and compact model, not more than 20 inches, this unit fits perfectly even in tight spaces. 

Dual control is a spectacular feature of this model. Automatic and manual power control options offer to choose what is suitable for you. 

The unit has its own breaker

Automatic power technology intelligently adjusts the required power after calculating the difference between the required temperature and the preset temperature. So, there is no waste of electricity and definitely you save money. The energy-saving ratio is nearly 60%.

In manual mode, you have 8 different levels ranging from 1 to 8, leaving you to choose any. 

It offers a 2.3 GPM flow rate which is equivalent to running two fixtures simultaneously in warmer areas of the United States like Florida, Texas, and California etc. But this flow rate declines to 1.5 GPM at lower temperatures i.e 30°F. 

Maintenance of this electric on-demand hot water heater is an essential task to keep them working perfectly. But if you have a hectic routine and never have time for such domestic work, the SioGreen Ir288 is the perfect choice for you. 

Provided that this unit heats the water indirectly by using advanced infrared technology. This infrared quartz tube mechanism heats water efficiently without contacting the metal, which wards off the corrosion, limescale deposit, and calcium buildup. As a result, no maintenance is required, nor replacements for damaged parts and water filters. 

So, these tankless electric water heater reviews help you to access clean hot water all time you need it.


  • Provides consistent flow rate.
  • Less energy expenditure.
  • No fussy maintenance due to contact-free heating.
  • Supplies clean water after removing metallic impurities.
  • Optimal performance in the areas with hard water.
  • Patented technology shut out corrosion, calcium, and limescale deposit.


  • Not a good option for large household hot water demands.
  • Consumes more energy in cold climates.
  • Fitting may vary in different regions.

8. Titan SCR2 N-120 Electric Tankless Water Heater Efficient & Compact

electric tankless water heater reviews
  • 4 Gallons Per Minute
  • Efficiently and reliable
  • Controlled energy consumption
  • Resettable thermostat manual


Power Source: ‎Corded Electric | Voltage:‎ 220 Volts | Wattage: 11.8 KW | Amperage Capacity: 60 Amps | Item Weight: ‎‎7.61 pounds| Product Dimensions: 10 x 2.5 x 7 inches | Warranty Description: 10 Year warranty 

Titan N-120 is an affordable model specially designed for the residents of warmer climates like Florida and Texas. This robust and long-lasting model Has been manufactured by Titan company in collaboration with Niagara Industries, the most trusting American company. 

This instant electric water heater is specially featured to deliver 4G p.m. at the temperature 65 degree Fahrenheit and above.  This gpm is sufficient for 3 bathrooms or for two long showers simultaneously. 

 As  advertised by the company  this  hot water heater Can be used as a whole house heater for medium sized homes  in  warmer regions.  It can be the perfect heater for office mobile or boat homes with low demand of hot water. 

In cold climates this heater can be used as a point of use heater exactly fixed next to the fixture.   This feature is not capable of heating  immediately incoming water with low temperature.

In addition, the inbuilt sensor triggers the heating element and provides the required hot water. The flow sensor automatically detects  the on and off of water through  fixtures and turns on and off the power respectively. 

So, Energy consumption is in control which brings up to 40% saving on electric bills. 

Integrated with resettable thermostat manual, helpful to prevent unanticipated risk of burning and reinforce safety. 

Being an efficient tankless hot water heater electric, this heater is ideal for hard water as it does not allow lime and sediment growth. Thus the unit lasts for long and gives wonderful performance. 

If you are handy with technical procedures, then installation is not a big deal and can be done easily within one hour.

To have a smooth supply of hot water, the electric system must be unit compatible. However, this heater draws 54 Amps, 11.8kw required to be operational, and a single 60 amp double pole breaker is more than enough for optimal working. 

The temperature can be set through a push button and can be noted via a simple up and down graph. Decent price with excellent qualities makes it the budget tankless unit.

Decent price with excellent qualities
Decent price with excellent qualities

Temperature controller intelligently observes the inflow and outflow 21 times per second, and then makes necessary adjustments accordingly. 

Brass and copper make this unit durable and eliminates the rust and mineral heaps. Offers Long warranty: 10 year on water holding components, whereas electric parts have 1 year limited warranty.


  • 99.8% energy efficient, resulting in minimum energy loss i.e. 0.2%.
  • Energy consumption is pretty low.
  • No rust and mineral accumulation due to the copper and brass protective layer.
  • Robust item and easy installation.
  • 99.5% energy efficient in an affordable and pocket friendly price.


  • May experience erratic temperature if multiple applications are on.
  • Resetting is required at times.
  • Recommended for warmer areas only.

9. ECOTOUCH 9KW Electric Cheap Tankless Water Heater

on demand electric water heater
  • Safe & durable
  • Smart self-modulation
  • Upgraded heating system
  • Instant & sufficient hot water


Power Source: 240V/60Hz Hardwire | Voltage: ‎240 Volts | Wattage: 9000 watts | Amperage Capacity: 50 Amps | Item Weight: ‎‎10.93 pounds| Product Dimensions: ‎15.74 x 10.24 x 2.05 inches | Warranty Description: 1 year warranty | Included Components: ‎8AWG Power Cord, Installation Accessories, Instruction Manual

Being a point of use tankless electric hot water heater, ECOTOUCH 9kw delivers abundant hot water instantly. This is a budget friendly item, promises to have an uninterrupted supply of hot water for higher temperature.

This is exclusively designed to be installed near the bathroom and kitchen sinks, dishwasher or laundry appliances, eliminating the waiting mode for preheating and temperature fluctuation. 

This hot water heater heats up 1.5GPM water from 67°F to 106F.

This may be the right decision to bring comfort and relaxation to access hot water instantaneously.

Comes with the self-modulation technology, this water heater automatically adjusts the power input relying on the flow rate and temperature setting concurrently. 

So, you never experience scalding hot water as the water flow reduces. Being 99.8% energy efficient, this heater cuts off considerable electric charge annually.  

At the same time, its most advanced upgraded system eliminates the cold water sandwiching through micro-computer control and patent heating mechanism. 

Another cool benefit comes with this electric instant hot water heater is the unique water heating system that alleviates corrosion in the pipes, making the item durable and extending its lifespan.

The safety measures provided by ECOTOUCH are matchless. It provides safety against:

  • Over temperature.
  • Dry heating.
  • Leakage (as inner water and electricity lines run separately).
  • Approval by ETL and qualifies for UL

In like manner, digital display and touch control panel allow the users to use and set the temperature conveniently. 

Compact size and stylish design makes it fit with any wall decor. All necessary parts are included in the item.

One must verify the electric requirements before buying which are:  9kW@240V; pipes fittings: 1/2″ NPT. With these tankless electric water heater reviews, it is easy to make the right decision.


  • Convenient size and stylish look blend in any decor.
  • Especially featured for sinks, dishwashers and laundry.
  • Optimal performance at higher temperature of 116°F.
  • Innovative technology and safety measures are amazing.
  • Durable and extended lifespan due to sturdy construction.


  • Limited water holding capacity.
  • Limited 1- year warranty.
  • Allows one shower at a time.

10. Bosch Electric Mini-Tank Water Heater 2.5 Gallons Convenient & Efficient

on demand water heater electric
  • Fast recovery rate
  • Easily mounted
  • Endless hot water
  • Sleek design & stylish look



Power Source: Corded Electric | Voltage: ‎140 Volts | Wattage: ‎1440 watts | Amperage Capacity: 15 Amps | Item Weight: 15.5 pounds| Product Dimensions: ‎‎13.75 x 10.75 x 13.75 inches | Warranty Description: 6 year warranty on unit, 2 year warranty on parts | Included Components: ‎Rough Plumbing and parts

The question  “What is the best tankless water heater” resonates throughout the winter season. Our reviews help you to choose the best and suitable tankless water heater electric powered, and pocket friendly. 

Being best on demand water heater, especially featured to be used as a point of use water  heater, is the perfect solution for access to hot water without waiting for too long.

The heater is good to go when installed right near the sinks where the hot water is needed. It can be used an addition to an existing large water source to boost hot water supply. 

It provides 2.5 gallon hot water every time you need it. This water flow is sufficient for two sinks simultaneously. Owing to fast heat recovery rate, this water discourages long wait by providing quick hot water exactly on demand. The temperature range for this unit is 65-161ºF.

This tankless heater serves for pre-heating water at far off faucets, hence no water is wasted in wait. 

Furthermore, this heater has glass-line material which extends its lifespan for longer service. Temperature can be controlled through its external dial feature. 

Above all, this mini point of use tankless water heater has maximum thermal energy about 98% enough for optimal performance.    

Equipped with a temperature-and-pressure relief valve, which guarantees safety.

This heater can be installed independently. It is easy to connect with the 120 volts through 36-37” cord plugins. Also can be quickly in-line with the existing large water source.

Convenient size and attractive look allow the unit to fit even in short spaces. Easily install in bathrooms, RV, patio, and open kitchen where other traditional counterparts are unable to fit.

Convenient size and stylish visual of this model allow the unit to mount on the wall, fix under the sink or even in any narrow palace.


  • Delivers instant hot water when and where you need exactly.
  • Cfc-free foam insulation keeps heated water warm for a longer period of time.
  • Fast recovery rate and long lasting quality.
  • Panic free installation.


  • Not a good option for luxurious hot showers.
  • May leak if not installed properly.
  • Produce annoying sounds.

How much power does a tankless water heater require?

The most crucial part of buying an tankless electric hot water heater is making sure you have the correct amount of amps, breaker settings, and wire sizes before installing it. Not only does this ensure its success, but it also ensures that it is operational and safe for you as well.

When mounting any of these units, make sure that you leave at least 18 inches of space around your installation site. Additionally, electricians are highly recommended for the installation of these units.

In order to use a tankless electric heater, you have to make costly upgrades to your electrical system. Among the Seisco models, the RA-28 has four 7,000-watt elements, which create a total load of 28,000 watts. At least 120 amps are needed to handle this additional load. A typical house has a maximum connection capacity of 200 amps, which means that an upgrade is needed. You might need to pay up to $1,500 for these upgrades. Additional equipment may be required by the Cooperative for tankless heaters, which could cost around $2000.

Is it true that tankless water heaters save money on my electric bill?

The manufacturers of instant water heater electric claim consumers save between 30% and 50%. However, a TVA ( Tennessee Valley Authority ) study suggests that an electric instant hot water heater could save an average user about $30 on electricity a year. In order to operate an tankless water heater electric, it needs to consume at least 120 amps, and the average household only uses 200 amps. As a result, you will likely need to upgrade your electrical system to accommodate for the greater load demand, which could cost as much as $1,500.

advantages of best electric tankless water heater
Advantages of Electric Instant Water Heaters – Infographics

Operating Cost / Energy Cost

A water heater consumes a considerable amount of energy to keep running. With the lowest capacity electric tankless heaters costing approximately $75 per year to more than $300 per year, the operating costs of electric water heaters may exceed $300 in case of whole house electric heaters.

The cost of running a gas water heater is approximately $200 to $600 per year, depending on its size and efficiency.


What is an electric tankless water heater?

Tankless water heaters are getting famous nowadays as they provide instant hot water on demand. They are different sources used to run them smoothly like corded electric, natural gas and propane gas.

When tankless water heaters use electricity to be functional, they are called electric tankless water heaters. They provide ultimate benefits to the users. As a matter of fact, they deliver hot water instantly whenever it is demanded. 

They heat the water when it is required. So, electricity is not wasted, which results in saving on the electric bills.

They are lightweight, easy to install and take less space. Maintaining hot water throughout the  day  to your home or business is the special feature of a tankless water heater.

Do electric water heaters require 220?

The separate 220-volts circuit is a must for electric ta water heaters. Moreover, electric on demand tankless water heaters compatible with 110V, 20V, 208V, 240V, and 277V are also available in the market.

Amperage capacity for different models is different. You must check before buying.

Similarly, circuit breakers are also vital keeping the electric model in mind. 

Does a tankless water heater work without electricity?

No, not at all. Electricity is the foremost requirement for the optimal performance of electric heaters. 

Even gas and propane models cannot work without electricity. They also need electricity to be functional properly.

Daniel Adley is a seasoned and skilled plumber with over 20 years of experience. Specializing in repairing and optimizing water appliances for large buildings, offices, and homes, he has a keen eye for efficiently identifying plumbing and maintenance issues. With a passion for his craft, Daniel brings extensive knowledge and expertise to every project, ensuring reliable and effective solutions for his clients.

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