Top 5 Electric Tankless Water Heaters Of 2024

Nowadays, electric tankless water heaters have become very popular among households. You can find so many electric tankless water heater reviews online, but none of them will help you actually make a decision. That is why we are going to assist you in choosing the best electric tankless water heater for you!

There are many different brands and models offered on the market today, which makes your decision much more difficult. How do you know which brand to trust? What kind of a heater would be right for your household?

Which is the best electric tankless water heater for you depends on your preferences as well as on the size of your household and the number of people who live in it.

Why Choose Electric?

Choosing between gas and electric for your tankless water heater is a big decision with long-term implications, and there’s no denying that electric models have their unique advantages. Here’s why going electric can be a brilliant move:

Ease of Installation

Firstly, electric tankless water heaters triumph in installation simplicity. You can say goodbye to the logistical headache of creating safe venting outdoors, which is mandatory for gas units due to the carbon monoxide they emit. No need to drill holes in exterior walls or worry about proper venting means your installation is not only easier but also cheaper.

Space Efficiency

Are you working with limited space? Electric models are your go-to. These compact units can fit into smaller homes or apartments like a charm, turning previously unusable spaces into functional areas. Whether it’s closet, under a sink, or a cramped utility room, your electric heater is a space-saving superhero.

Energy Savings and Eco-friendliness

Here’s something to feel good about electric models are typically more energy-efficient than traditional gas ones. They convert almost 100% of the electricity they consume into heat. This efficiency means less waste, smaller energy bills, and a happy environment. Plus, with no greenhouse gases emitted, you’re choosing a cleaner, more sustainable future.

Safety and Peace of Mind

Without the risk of gas leaks or carbon monoxide poisoning, electric water heaters offer a significant safety advantage. There’s a certain peace of mind in knowing you’re avoiding these hazards, especially in homes with children or pets.

Maintenance Simplicity

Remember the dread of yearly inspections and maintenance that come with gas systems? Electric models alleviate that burden, requiring less frequent and less complicated maintenance. With fewer moving parts and no combustion processes, the technical upkeep is far less daunting, saving you time and professional service costs.

Initial Cost Advantage

While long-term savings are a topic of hot debate, there’s no denying the attractiveness of electric heaters’ lower upfront costs. The units themselves are more affordable, and when you factor in the installation and absence of venting requirements, you’re looking at significant savings at the outset.

Choosing an electric tankless water heater isn’t just a purchase; it’s an investment in convenience, safety, and efficiency. While it’s essential to weigh these benefits against your specific needs and circumstances, the perks are pretty compelling, don’t you think?

Best Electric Tankless Water Heater – 2023 Reviews

A few factors which you should consider when choosing an electric tankless water heater are size, heating capabilities, energy-saving efficiency and quality, depending on the brand name behind the product and can be verified through customer reviews. What should majorly influence your decision is the size of your household and whether a certain heater can meet those needs.

More about these factors can be read in the buyer’s guide below. We have covered all those aspects that need to be looked at when buying our electric water heater reviews.

Without further ado, let’s get into our list of Top 5 Electric Tankless Water Heaters.

1# Rheem 18kW Tankless Electric Water Heater

When it comes to selecting the ideal water heater, the Rheem 18kW Tankless Electric Water Heater effortlessly claims a top spot due to its remarkable versatility. This robust model stands out, blending high-performance functionality with the reliability that comes from a brand as reputable as Rheem.

Rheem 18kW Tankless Electric Water Heater

With an impressive output of 18 watts, this compact yet powerful unit punches well above its weight, delivering a substantial 61,419 BTUs. This high energy output positions it perfectly for dual roles: it’s efficient enough to serve as a point-of-use heater for immediate needs while also possessing the capacity to function as a primary water heater for a household of two, offering up to 4.4 gallons per minute of instant hot water satisfaction.

Rheem’s near-century of industry leadership is more than a historical footnote; it’s a testament to the brand’s commitment to quality and reliability. This assurance is reflected in their solid warranty, offering five years of coverage on heating components and a year’s guarantee for additional parts, presenting a worry-free investment for homeowners.

Preparation is paramount, and future owners should note the requirement for dedicated electrical provisioning, specifically space for two 40-amp breakers operating at 240 volts. But this is more than a simple spec; it’s part of what makes the Rheem model an owner-friendly option. Beyond the electrical setup, you’ll be captivated by its staggering 99.8% efficiency rating. This high-efficiency performance is complemented by automated energy consumption, ensuring that it only uses the precise amount of energy needed, avoiding any waste.

The Rheem 18kW doesn’t just excel in performance; it also shines with its consumer-centric design. Owners will appreciate the straightforward temperature controls, allowing for hassle-free adjustments to meet specific hot water preferences. Moreover, when it comes to maintenance, Rheem has prioritized accessibility, ensuring that the unit’s upkeep won’t be a burden. This ease of maintenance, coupled with its superior efficiency and powerful performance, underscores the unit’s status as a convenient, easy-to-own appliance, making it an attractive centrepiece in your home’s utility ensemble.


  • Trusted company name
  • High efficiency rating
  • Versatile


  • High electrical demand
  • Requires two circuit breakers

2# Stiebel Eltron Tempra 24 Plus

Tempra 24 Plus is one of the best electric water heaters out there in the market. With proven reliability, this model is one of the most talked about models on the market. Some customers praise it for its convenience and large capabilities, while others have had issues after a few years of usage. There are definitely more positive than negative reviews for this model.

Stiebel Eltron Tempra 24 Plus

The Stiebel Eltron Tempra 24 Plus model will heat your water in no time without needing venting of any kind. The high-end technology is proven to be successful in saving energy as this tankless water heater mode will save up to 20% of your electricity bill. The sleek design lets you store it anywhere you find convenient, from the bathroom to the basement.

The Tempra 24 Plus has larger water heating capabilities compared to the Rheem RTE 9 model, and thus, it is a whole-house electric tankless water heater. It can provide hot water for two showers at the same time, whereas some customers have been running it on two showers and a sink at the same time. This model is able to deliver enough hot water for more units at one time, considering that one of them will have reduced pressure.

The digital temperature control lets you easily track and control the heating process. To get the best out of this model and to lessen the chances of malfunction, it is required for the heater to be set up with a 100 amp breaker pole. The warranty will cover any possible malfunctions.

Malfunction has been reported after 2-3 years of using this model. All the malfunctions are easily fixed under the warranty. The Tempra 24 Plus offers a three-year warranty only if set up by a licensed technician.

In conclusion, the Stiebel Eltron Tempra 24 Plus will serve its purpose efficiently, even providing more capacity for more than one sink and one shower at a time. The limited warranty may be a downside, but if your water composition state is checked, you should not experience any major issues. Customers are overall satisfied with this water heater model.


  •  Reliable
  •  Efficient energy saving
  •  No venting required
  •  Digital temperature control
  •  Sleek Design


  •  Limited Warranty
  •  Malfunctions due to water composition

3# EcoSmart ECO 11

The first on our list of the best electric tankless water heaters is the EcoSmart ECO 11 heater. Being one of the most advanced examples of this technology on the market, this EcoSmart model can meet the full house requirements easily.EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11

Compared with other electric tankless water heater models, the EcoSmart ECO 11 has a very sleek design, convenient for placing it anywhere you desire. It does not take up much space, which is perfect for smaller kitchens or bathrooms. With its digital temperature control panel, you will be able to control the heating throughout the whole process.

This is an on-demand electric water heater that heats up to two gallons of water per minute while it passes through it without being retained in any kind of storage unit. That means you can have hot water ready whenever you turn the tap on.

EcoSmart ECO 11 will save you up to 60% of your average water heating costs thanks to its advanced technology, which uses energy only when necessary. This tankless water heater model can provide hot water for one sink and one shower at the same time, enough for a one-bathroom household.

In order to get the best out of this appliance, the set-up must meet some requirements, such as a minimum 125 amp electricity panel with a 60 amp double pole breaker, which has to be connected to a set of 6 AWG wires.

A minor downside is that there are no LED light indicators on this model, but they can be found on the model below in our list, the Rheem RTE 9.

All together, EcoSmart ECO 11 is a great choice for an average household. It comes with a lifetime warranty, so any possible malfunctions will be covered. When compared to some models on the market, ECO 11 comes at an affordable price for the quality it delivers.


  •  Efficient energy saver
  •  Heats 2 gallons per minute
  •  Compatible size
  •  Digital Temperature Control
  •  Cover one sink and one shower at the same time


  •  No LED indicator lights
  •  Possible malfunctions

4# Rheem RTE 9

The Rheem RTE 9 Electric Tankless water heater model is one of the best models out there because of its ability to provide hot water within 15 to 20 seconds. There is no doubt this tankless water heater model will suit the needs of an average family with no more than one bathroom.

Rheem RTE 9

What makes this model stand out on the market is the LED light indicator, which tells you whether the appliance is active or in standby mode. The great thing is that it does not use energy at all when in standby mode, saving you much more money than certain models out there. The on-unit temperature control panel will help you keep track of the heating process.

Rheem RTE 9 is one of the best tankless electric water heater models that heats up to three gallons of water per minute (3 GPM), which is a bit less than the previous model we mentioned. However, that is quite enough to cover one sink and one shower at the same time.

The Rheem RTE 9 model gives you hot water on demand and won’t let you down when it comes to energy-saving efficiency. Its compatible size allows easy placement anywhere you find it convenient. The heating system works fairly quickly, providing you with hot water after 15 to 20 seconds of running the tap.

The limitation of this model is the heating capacity of one gallon per minute, making it not suitable for households with more than one bathroom. Compared to the previous model we mentioned, the EcoSmart ECO 11, which has a lifetime, RTE 9 has a limited warranty.

The warranty which comes with this appliance lasts one year for the parts and 10 years for the heat exchange. However, the warranty is offered only if a professional, licensed technician installed the appliance.

Overall, the Rheem RTE 9 model is convenient for smaller households of no more than four people. If set up properly, meeting the electricity requirements of having a 40 amp pole breaker, the appliance should not have any issues running. If any malfunctions occur, the warranty will cover it as long as it’s still available for you.


  •  LED light indicators
  •  On-unit temperature
  •  Quick heating
  •  Energy saver
  •  Compatible size


  •  Not a lifetime warranty
  •  Less heating capacity

5# BOSCH Tronic 3000

We have come to one of the most affordable models on the market today but don’t let that fool you; the low price of a BOSCH Tronic 3000 does not indicate its quality. Customers who have purchased this appliance are happy to have it in their homes.

BOSCH Tronic 3000

The BOSCH Tronic 3000 model has a 9.5 kw output and works on 220 volts. It is capable of providing endless hot water on demand for two units at one time, whether it is two sinks or a sink and a shower. Customers love this model because it is lightweight and very compact. It comes in four sizes, with the possibility of mounting it on a wall.

The water is heated quickly thanks to a good water flow system. The easy installation process enables you to set up the appliance by yourself only if you are familiar with electricity. Otherwise, having a professional set up the heater is highly recommended.

Bosch Tronic 3000 water heater Provides hot water with electrical power at the sink where you need it, so you don’t waste time or water waiting. Bosch tankless water heaters are 98% efficient, and no temperature or pressure relief valve is necessary. Because water is heated directly without the use of a storage tank, traditional tank heaters experience no standby energy loss, and no pressure or relief valve is required.

Bosch tankless heaters are compact and lightweight and can be mounted vertically or horizontally to blend in seamlessly with existing decoration.

Ideal tankless electric water heater for Half bathrooms and powder rooms, Basement wet bars, Laundry rooms, Kitchenettes, Patio sinks, Pool Houses, Garages, and Single-unit use in apartment buildings and multi-family homes.

Little tough to install. Also, It lacks modern design and appearance as well as the LED control panel.

Altogether, for the cheap price, this electric tankless water heater is more than good quality. It will run for years, providing you with hot water on demand on more than one sink in the house. The BOSCH Tronic 3000 is definitely a recommended model if you are looking for a smaller, compatible appliance.


  •  Lightweight
  •  Comes in four sizes
  •  Efficient energy saver
  •  Supplies hot water quickly
  •  Cheap


  •  Limited warranty
  •  No modern design

Buyer’s Guide – What to look for when buying an electric tankless water heater?

When choosing the best electric tankless water heater, you must consider many factors. People always look for high quality in the first place, but that is where they make the first mistake. It is generally believed that the price of an appliance indicates the quality. While in some cases that might be true, this is definitely not one of them.

There are plenty of cheaper models available that will offer you just about the same deal as the more expensive ones. So, let’s take a look at the factors you should consider when buying an electric tankless water heater.

The size of the appliance is important in order for you to be able to place the heater where you find it convenient, whether it is your bathroom, kitchen or even the basement. Heating capabilities are crucial because of the number of people who would be using the appliance. Therefore, the heating capability must meet the requirements, such as being able to provide hot water in the sink and the shower at the same time.

Energy saving efficiency is an important factor because it is part of the reason why you are getting the tankless heater anyway. Making sure your electric system meets all requirements for a certain heater model is essential to get the best efficiency in energy saving as well as the least number of malfunctions possible.

Additional things you can look for are the speed of the heating process and the pressure specifications. With some of the lower-quality models, you will experience lower pressure if you run several taps at once.

Wrapping up

Navigating the realm of electric water heaters can seem daunting, given the plethora of options available. Whether you’re seeking a small, efficient unit for a single room or a powerhouse that serves an entire home, understanding your unique needs is key. Identifying your specific requirements is the first step toward finding the right solution.

We’ve analyzed various water heaters to recommend the best for diverse needs, focusing on efficiency, dependability, and innovative features. Use our insights as a springboard for your comparison shopping, ensuring you find a model that aligns with your circumstances.

What are your thoughts on our selection? If you have experiences to share or advice for others embarking on this selection journey, we encourage you to contribute. Insights on aspects like energy efficiency, durability, or even customer service can significantly influence purchasing decisions.

Join the conversation by leaving your comment below. Sharing is not just caring; it could guide someone to their perfect electric water heating solution!