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Top 9 Whole-House Electric Tankless Water Heaters: A Detailed Review

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Best Whole-House Electric Tankless Water Heater Reviews

Nothing quite beats the comfort, and relaxation hot showers provide, especially after a long and busy day. After all, hot showers can help relax the muscles, enhance your circulation, and improve sleep, making it an excellent way to relax and unwind.

However, it can be tough to constantly supply your entire home with hot water, especially if you have a traditional water heater tank.

This is where tankless water heaters come in handy; they’re energy-efficient, longer-lasting, and provide an endless supply of hot water. Still, various models are available, so how do you pick the best whole house electric tankless water heater for you?

With that said, check this article out for comprehensive whole house electric tankless water heater reviews of the top 9 models on the market.

Products Review

Contents

If you’re on the lookout for the best whole house electric tankless water heater on the market, you should check out the following reviews for the top 9 models available these days.

1.  Rheem Performance Self-Modulating 36-kW Electric Tankless Water Heater

This 36-kW electric tankless water heater from Rheem provides entire homes with a constant supply of hot water at a rate of up to 8.8 gallons per minute. It can reduce your water and energy consumption costs by up to 34% for whole-house applications and up to 50% for point-of-use situations.

It has a space-saving and compact design that allows it to be installed almost anywhere in your home, even in tight and narrow spaces. It also features electronic temperature control, enabling you to adjust the temperature by one-degree increments from 80 to 140 degrees Fahrenheit.

Moreover, it uses standard ¾-inch water connectors that allow you to install it and replace parts when needed quickly.

Highlighted Features:

  • Features a temperature range of 80 to 140 degrees Fahrenheit
  • Electric temperature control panel for easy adjustment
  • Supplies hot water at a rate of up to 8.8 gallons per minute
  • Consumes only 36kW
  • Uses four 40A double-pole breakers

The Pros:

  • Compact and space-saving design
  • Energy-efficient for better savings
  • Easy to install and maintain
  • Self-modulating for efficiency

The Cons:

  • Has a tough time supplying hot water in the winter

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Read more: Rheem Tankless Water Heater Reviews: Everything You Need to Know and More

2.  Stiebel Eltron Tempra 29 Plus Self-Modulating 28.8kW Electric Tankless Water Heater

Next on these best whole house electric tankless water heater reviews is the Tempra 29 Plus electric tankless water heater from Stiebel Eltron.

It features a unique Advanced Flow Control technology that allows it to provide homes with a steady supply of hot water without being affected by fluctuating water pressure.

As a result, you get to enjoy stable temperatures for your hot water every time. It’s powerful enough to supply up to three bathrooms with hot water at a rate of up to 6 gallons per minute, even in cold temperatures.

In addition, it has a digital front-panel display where you can adjust its capacity to your preferred temperature within a 68 to 140-degree Fahrenheit range. It also offers a consumption reduction of up to 20%, allowing you to maximize its use without worrying about the costs.

Highlighted Features:

  • Features an Advanced Flow Control technology for temperature stability
  • Can supply hot water at a rate of up to 6 gallons per minute
  • Heats water within a 68 to 140-degree Fahrenheit temperature range
  • Reduces energy and water consumption by up to 20%
  • Uses three separate 40A double-pole breakers

The Pros:

  • Energy-efficient for more savings
  • Automatic stabilization of water temperature
  • Self-modulating for lower energy consumption
  • Convenient and easy-to-use front-panel controls

The Cons:

  • Requires you to start at lower temperatures for better stability

How to Install Stiebel Water Heater

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Read more: Reviews of the 5 Best Stiebel Eltron Tankless Water Heaters on the Market

3.  EcoSmart ECO-27 27kW Electric Tankless Water Heater

EcoSmart’s ECO-27 electric tankless water heater is one of the best whole house electric tankless water heater models on the market these days due to its capacity to deliver a powerful performance at a low cost.

It features a self-modulating technology that allows it to adjust its energy consumption while providing hot water at a rate of 2.7 to 6.5 gallons per minute. As a result, you can save up to 50% on your energy bills, giving you more cash for your other needs.

You can adjust the water’s temperature by one-degree increments within a range of 80 to 140 degrees Fahrenheit using its convenient digital temperature control panel.

Moreover, it’s compact enough that it can be easily installed in tight spaces yet still powerful enough to deliver enough hot water whenever you need it. Lastly, it features durable stainless steel construction for long-lasting performance.

Highlighted Features:

  • Adjustable temperature control within an 80 to 140-degree Fahrenheit range
  • Supplies hot water at a rate of 2.7 to 6.5 gallons per minute
  • Uses self-modulating technology for better energy efficiency
  • Consumes only around 27kW of power
  • Requires three 40A double-pole breakers

The Pros:

  • Saves up to 50% on your energy bills
  • Easy to set up and install anywhere
  • Durable and long-lasting construction
  • Simple to use and operate

The Cons:

  • Has trouble regulating temperature with fluctuating flow rates

Ecosmart 27 Tankless Water Heater Installation

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Read more: 3 Best EcoSmart Tankless Water Heater Reviews

4.  Titan SCR-4 27kW Electric Tankless Water Heater

Another top choice in these whole house electric tankless water heater reviews is the Titan SCR-4 27kW tankless water heater. Available at a more affordable price point, it features a compact and space-saving design that allows you to mount it anywhere you want.

It supplies a constant stream of hot water at a rate of 5 gallons per minute and keeps the temperature within a 105 to 120-degree Fahrenheit range. It consumes only 27kW and ensures an energy-efficient performance each time.

As a result, you can enjoy a reduction in your water heating consumption costs by up to 60%, allowing you to save more while enjoying an unlimited supply of hot water. It also has a convenient temperature control panel in the front, allowing you to adjust the temperature according to your preference.

Highlighted Features:

  • Supplies hot water at a rate of 5 gallons per minute
  • Features a temperature range of 105 to 120 degrees Fahrenheit
  • Consumes only up to 27 kW
  • Features a convenient front temperature control panel

The Pros:

  • Provides a consumption reduction of up to 60%
  • Has an easily mountable design
  • Compact and lightweight for easy installation
  • Available at a budget-friendly price tag

The Cons:

  • The water temperature may fluctuate at times

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Read more: The Best Titan Tankless Water Heater Reviews

5.  BLACK+DECKER 27-kW Electric Tankless Water Heater

BLACK+DECKER offers users a convenient way to enjoy a constant supply of hot water with this 27-kW electric tankless water heater. It’s powerful enough to provide a three-bedroom home with up to 5.4 gallons of hot water per minute.

It’s also designed to reduce up to 50% of your total energy consumption, allowing you to enjoy hot showers without worrying about the costs. It also has a compact design that’s perfect for installation in tight, hard-to-reach locations.

Moreover, it features a digital control panel for easy temperature adjustment, allowing you to heat the water up to 135 degrees Fahrenheit. It features a corrosion-resistant stainless steel external construction with lead-free internal piping that allows for long-lasting performance and durability.

Highlighted Features:

  • Consumes only up to 27kW
  • Provides hot water at a rate of 5.4 gallons per minute
  • Can heat water up to 135 degrees Fahrenheit
  • Constructed with corrosion-resistant stainless steel and lead-free piping
  • Features a convenient digital control panel and automatic flow sensor

The Pros:

  • Allows for an energy consumption reduction by up to 50%
  • Durable and long-lasting construction
  • Compact design for easy installation
  • Ideal for three-bedroom homes

The Cons:

  • Struggles slightly when powering multiple showers at once

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6.  ATMOR 29kW Electric Tankless Water Heater

This 29-kW electric tankless water heater from ATMOR is another excellent choice for the best whole house electric tankless water heater for your home. With this, you can enjoy a continuous supply of hot water in up to three bathrooms simultaneously.

It allows you to enjoy an on-demand hot water supply whenever you need it while enjoying up to 50% in savings from reducing your water heating consumption costs.

It can supply hot water at a rate of up to 5.4 gallons per minute and a temperature of up to 122 degrees Fahrenheit. You can also easily adjust the temperature with its convenient digital control panel.

Moreover, it also has a compact and space-saving wall-mount vent-free design that allows you to install it wherever you want. Lastly, it features a corrosion-resistant stainless steel construction that makes it easy to maintain and prolongs its lifespan.

Highlighted Features:

  • Consumes only up to 29kW
  • Provides hot water at a rate of 5.4 gallons per minute
  • Has a maximum heating temperature of 122 degrees Fahrenheit
  • Space-saving wall-mount design
  • Features a corrosion-resistant stainless steel construction

The Pros:

  • Reduces your consumption by up to 50%
  • Highly durable and long-lasting performance
  • Allows for easy installation anywhere you want
  • Easily adjustable temperatures

The Cons:

  • Installation instructions can be somewhat confusing

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7.  Eemax EEM24027 27kW Electric Tankless Water Heater

The EEM24027 electric tankless water heater from Eemax has a 99.8% energy-efficient performance that allows for better savings on your energy bill. With this, you can enjoy a steady flow of hot water at a rate of up to 7 gallons per minute while only consuming up to 27kW.

In addition, you can easily adjust the temperature to just how you want it using its easy-to-use digital temperature control knob. Using this knob, you can adjust the temperature in one-degree increments within an 80 to 140-degree Fahrenheit range.

Moreover, it’s small and lightweight, so installing it where you need it is easy enough, even if it’s under the sink or in a cabinet.

Highlighted Features:

  • Provides hot water at a rate of up to 7 gallons per minute
  • Consumes only 27kW of power
  • Features a 99.8% energy-efficient performance
  • Heats water at a range of 80 to 140 degrees Fahrenheit
  • Easy-to-use temperature control knob

The Pros:

  • Provides a higher level of savings with its energy-efficient performance
  • Highly durable for long-lasting performance
  • Lightweight and compact
  • Can power multiple fixtures at once

The Cons:

  • Struggles with heating large amounts of water

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8.  IHeat AHS27-D Real-Time Modulating 27kW Electric Tankless Water Heater

This model from IHeat is another contender for the best whole house electric tankless water heater due to its capacity to deliver a 99% energy-efficient performance. As a result, you can enjoy up to 25% in savings from lower energy bills.

It’s versatile enough to be used for three-bathroom homes and even commercial settings like restaurant kitchens, clinics, and hospitals. It features a real-time modulating technology that allows it to adjust its energy consumption based on the amount of incoming water.

Therefore, it can deliver a steady supply of hot water at a rate of up to 5.2 gallons per minute without hiking up the costs. It also has a compact and lightweight design, ideal for easy installation in tight spaces.

Lastly, it has a simple digital temperature control panel that you can use to adjust the temperature within an 80 to 140-degree Fahrenheit range.

Highlighted Features:

  • Supplies hot water at a rate of up to 5.2 gallons per minute
  • Adjustable temperature within a range of 80 to 140 degrees Fahrenheit
  • Consumes only up to 27kW of power
  • Ideal for three-bathroom homes and commercial setups
  • Has a real-time modulating technology for better energy efficiency

The Pros:

  • Energy-efficient consumption for up to 25% in savings
  • Designed for larger homes
  • Small yet powerful
  • Easily adjusts its consumption based on what’s needed

The Cons:

  • Has trouble heating larger amounts of water
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Read more: Review of the Best iHeat Tankless Water Heaters

9.  Bosch WH27 27kW Electric Tankless Water Heater

Last but not least is the Bosch WH27 electric tankless water heater, which was designed to replace a 40-gallon water heater tank. As a result, it can provide a steady supply of hot water to your entire house at a rate of up to 4 gallons per minute.

Moreover, it has a built-in flow rate sensor that allows it to adjust its consumption and heating capacity according to just how strong your water pressure is. Because of this, you enjoy a constant temperature for your water, regardless of the water pressure’s strength.

It’s designed to heat only the amount you need, allowing you to save up to 50% on your energy bills due to its increased energy efficiency. It has a lightweight and compact design that will enable you to install it wherever you want.

Lastly, you can also adjust the temperature up to 131 degrees Fahrenheit using the temperature control knob located on its front.

Highlighted Features:

  • Supplies hot water at a rate of up to 4 gallons per minute
  • Features a built-in flow rate sensor for better stability
  • Heats water up to 131 degrees Fahrenheit
  • Adjustable temperature using a control knob
  • Consumes only around 27kW of power

The Pros:

  • Provides up to 50% in savings on your next energy bill
  • Easy-to-use temperature control knob
  • Lightweight and compact
  • Keeps the temperature steady, regardless of the water pressure

The Cons:

  • Has trouble providing enough water for multiple fixtures at once
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Read more: Bosch Tankless Water Heater Reviews

The Most Important Features of Electric Tankless Water Heaters

Finding the best tankless electric water heater for the whole house can be challenging, especially if you don’t know what to look for.

With that said, here are the essential features to look out for when choosing the right tankless electric water heater for your home.

  • Flow Rate

Your unit’s flow rate is one of the most crucial factors to consider, as this will determine just how much hot water it can supply your fixtures. Your unit’s flow rate is measured with GPM or gallons per minute.

Typically, a house with one or two bathrooms requires only a flow rate of around 5 GPM, while larger homes would need somewhere closer to 10 GPM.

  • Efficiency Level

The next crucial factor is your unit’s efficiency level because this determines just how much power it consumes when heating water. Fortunately, most electric tankless water heaters offer an efficiency level of up to 98 to 99 percent.

As a result, you can save as much as 50% on your energy bills while still enjoying a steady supply of hot water.

  • Price

Price is another consideration because most of the best whole-house electric tankless water heaters can come at higher price tags.

However, this doesn’t mean that you have to spend a fortune on one, nor does expensive guarantee quality. So, ideally, it’s best to pick a suitable model for your house to ensure you maximize its use and potential savings.

FAQs

  • What tankless electric water heater size do I need for my house?

The ideal size of the electric tankless water heater for your house will largely depend on how many fixtures it needs to supply hot water. However, most homes would only require a model with a 5 to 10 GMP flow rate capacity or one with a capacity of around 10 to 28kW.

  • Can a tankless water heater work for the whole house?

Yes, it can, especially if it’s a whole-house model. Whole-house electric tankless water heaters are designed to supply hot water to multiple fixtures at once. In contrast, point-of-use heaters are only suitable for one to two uses at a time.

  • What is the best electric tankless water heater for my home?

The best model for your home will depend largely on your needs, the size of your home, and how many people will need hot water at once.

However, the models reviewed in this article are all designed to supply enough hot water to entire houses, so you can’t go wrong with choosing one from the list.

  • What size tankless water heater do I need for a family of 3?

For households with only three members, an electric tankless water heater with 15 to 23 kW capacity would be enough to provide hot water for everyone.

Conclusion

Overall, a whole-house electric tankless water heater can allow you to enjoy a steady supply of hot water without worrying about the costs of doing so.

In fact, the Titan SCR-4 27kW Electric Tankless Water Heater is the top choice if you’re looking for a whole-house electric tankless water heater that offers the highest amount of savings. It allows for up to 60% in terms of energy bill savings while supplying enough hot water at a rate of 5 GPM.

However, for those with larger homes and who need a model with a higher flow rate, the Rheem Performance Self-Modulating 36-kW Electric Tankless Water Heater can be the better option. It offers a flow rate capacity of up to 8.8 GPM while giving you up to 34% savings with whole-house use.

Read more:
  • What you need to know about buying the best tankless gas water heater

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