In the hi-tech world that we live in, a classic water heater tank is most of the time a waste of space, energy, and resources. If you ever considered upgrading, you should go for the best electric tankless water heater. These devices represent a growing market and an example of how technology can help us save water and money while we enjoy instant hot water any time we need it. Since winter is coming – and fast – having hot water on demand with high levels of efficiency and comfort is a dream that can come true right now.
How Did We Choose the 9 Best Electric Tankless Water Heaters for this List?
Before we check out together the nine best whole house electric tankless water heater reviews of today, let us tell you, we spent hours checking out the products, discussing with users and manufacturers, and verifying the tech details with experts in the field. What resulted from this thorough research is the top ten best tankless water heater reviews below!
Which is the Best Electric Tankless Water Heater of this Year?
| Product Name | kW | Flow Rate | Temperature Range | Best For |
|---|---|---|---|---|
 Stiebel Eltron 24 Plus Tempra Electric Tankless Water Heater Check Latest Price |
24 kW | Up to 5 GPM | 86°F – 140°F | EDITORS’ CHOICE: Best Overall Eco-Friendly Tankless Water Heater |
 Rheem RTEX 24 Residential Electric Tankless Water Heater Check Latest Price |
24 kW | Up to 6 GPM | 80°F – 140°F | Most advanced self-modulation capabilities |
 Eemax EEM24027 Electric Tankless Water Heater Check Latest Price |
27 | Up to 5.3 GPM | 80°F – 140°F | Easy Installation |
 EcoSmart ECO 27 Electric Tankless Water Heater Check Latest Price |
27 | Up to 6 GPM | 80°F – 140°F | Design |
 Rheem RTEX 13 Residential Tankless Water Heater Check Price |
13 | Up to 3.5 GPM | 80°F – 140°F | Price/Value Ratio |
Best Whole House Electric Tankless Water Heater Reviews
Stiebel Eltron 24 Plus Tempra Tankless Water Heater
Best For: OVERALL USE
Stiebel Eltron 24 Plus Tempra Water Heater
- 4.6 x 16.6 x 14.5 inches
- 1 pound
- 240 Volts
- Mounting installation method
- Warranty: 3 years
Why Should You Buy the Stiebel Eltron 24 Plus Tempra Tankless Water Heater?
The first entry on this list is also the best tankless water heater for overall use. The Stiebel Eltron 24 Plus Tempra comes with the advanced flow control German patented technology invented by Stiebel Eltron. Besides being a model of good practices and a standard of quality when it comes to water heating, this Stiebel Eltron model also has a handful of great features:
- Automatically maintains water temperature for constant comfort;
- This eco-friendly unit saves energy with auto-modulation and the ability to electronically measure water flow;
- Savings monitor shows how much you save on energy costs;
- Requires a minimum recommended household electric service of 150 A, and offers an output water temperature of 86˚ to 140˚F;
- 7-Year Leakage and 3-Year Parts Warranties are included with purchase.
| Pros | Cons |
|---|---|
| Best eco-friendly tankless electric water heater | It may require professional installation |
| Noise-free | |
| Digital temperature display | |
| Preset temperature memory buttons |
Verdict
The Stiebel Eltron 24 Plus Tempra tankless water heater is an eco-friendly and energy-efficient device that works great for medium-to-large families and homes. Made in Germany and coming with excellent technical features, this tankless water heater will deliver instant hot water effortlessly. Moreover, it also allows you to save money on bills in the long run. A great choice if you are serious about making thorough and long-term investments in your home.
Rheem RTEX 24 Residential Tankless Water Heater
Best For: SELF-MODULATING TECHNOLOGY
Rheem RTEX 24 Residential Water Heater
- 4 x 18 x 19 inches
- 17.8 pounds
- 240 volts
- 99.8% Energy efficient
- Warranty: Up to 10 years
Why Should You Buy the Rheem RTEX 24 Electric Tankless Water Heater?
The second product on our list is a true gem regarding self-modulating capabilities and technology in general. If you take a glance at its specs and features, you will understand why quickly.
- Compact and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F;
- External Digital Thermostatic Control with LED display (+/- 1-degree accuracy);
- Durable Copper Immersion – Three heating elements, field serviceable;
- Simple Installation – Bottom 3/4″NPT water connections;
- Digital temperature display.
| Pros | Cons |
|---|---|
| Excellent tech specs and features | Tech support could be better |
| Good price | |
| A great number of home applications | |
| Excellent warranty |
Verdict
Durable and reliable, this tankless electric water heater provides you with instant hot water to a specific sink in your home or the entire house. Easy to install and comes with excellent hi-tech specs and features. You cannot skip this Rheem model when you make the shortlist of best electric tankless water heaters.
Eemax EEM24027 Electric Tankless Water Heater
Best For: EASY INSTALLATION
Eemax EEM24027 Water Heater
- 17 x 17 x 3.8 inches
- 17.4 pounds
- 240 volts
- Self-modulating technology available
- Warranty: Up to 5 years
Why Should You Buy the Eemax EEM24027 Electric Tankless Water Heater?
When it comes to installing the best electric tankless water heater in your home during the cold season, you should not worry about calling a plumber or accidentally leave your family without hot water in the bathroom(s). The Eemax EEM24027 is easy to install and comes with all the trimmings and accessories. Nevertheless, it also comes with other interesting features you’d like to learn more:
- The unit will adjust how much energy needs to be input based on how much hot water is needed;
- Compact size saves valuable storage space;
- It can produce enough hot water for up to 1 shower and 2 sinks simultaneously in colder climates;
- In warmer climates, it can produce enough hot water for up to 4 Showers or sinks simultaneously.
| Pros | Cons |
|---|---|
| Easy installation | None that we can think of |
| Excellent price | |
| Lowers electric bills | |
| Works great in both cold and warm climates |
Verdict
For a device in its price category, the Eemax EEM24027 stands out of the crowd. Its slick design, easy installation, and outstanding tech specs make it a fine choice if you want hot water on demand no matter where you live. Check to see if the product is the correct size for your hot water needs. If it is, you should not miss the chance of using one and soon!
EcoSmart ECO 27 Electric Tankless Water Heater
Best For: DESIGN
EcoSmart ECO 27 Water Heater
- 3.6 x 17 x 17 inches
- 11 pounds
- 240 volts
- Configured for cold climates or high flow rates
- Warranty: Limited Lifetime
Why Should You Buy the EcoSmart ECO 27 Electric Tankless Water Heater?
This tankless water heater is the best money can buy in the design department. When we say design, we mean more than aesthetics, however. The EcoSmart ECO 27 comes with a compact size that saves valuable storage space and copper & stainless components designed for efficiency, durability and easy replacement. But let’s see other tech specs and features that make this product worthy of this list!
- Saves up to 50% on water heating costs;
- Pipes fittings: 3/4 inch NPT;
- Digital temperature control in 1-degree increments allows control of hot water;
- One of the largest electric tankless water heaters available with the brand’s patented self-modulating technology;
- Handles up to two showers running at the same time;
- Perfect for cold climates.
| Pros | Cons |
|---|---|
| Designed for beauty and durability | Better customer support would be nice |
| Excellent price | |
| Significant water and money savings | |
| Perfect for cold climates |
Verdict
Besides its slim and cool design, this product is the best tankless electric water heater for cold climates. Moreover, it is one of the bigger heaters, capable of handling large homes and families. The price is compelling to say the least – especially given the warranty – and the users’ enthusiasm contagious.
Rheem RTEX 13 Residential Tankless Water Heater
Best For: PRICE/VALUE RATIO
Rheem RTEX 13 Residential Water Heater
- 4 x 9 x 13 inches
- 4 pounds
- 240 volts
- Self-modulating power control
- Warranty: Up to 10 years
Why Should You Buy the Rheem RTEX 13 Residential Tankless Electric Water Heater?
We continue our best whole house electric tankless water heater reviews with another device coming from Rheem. While this one is smaller when it comes to wattage (only 13 kW), it is, however, the perfect example of a high-quality meeting low price. Here are some tech specs and features to help you understand why we listed this product here:
- Comes with external adjustable digital thermostatic control with LED display (+/1 degree accuracy);
- Features durable copper immersion with two heating elements;
- External controls to adjust the temperature in increments of 1°F;
- Digital temperature display.
| Pros | Cons |
|---|---|
| Best tankless water heater for price/value ratio | May leak so make sure you install it properly |
| Energy efficient | |
| Great temperature control | |
| Can save up to 30% in bills |
Verdict
A true piece of high-tech jewelry, this tankless electric water heater can save you plenty of money and resources throughout the year. When you compare the price, tech specs, and warranty, you realize it is one of the best electric tankless water heaters on the market.
Titan N-120 Electric Tankless Water Heater
Best For: AVERAGE SIZE HOMES
Titan N-120 Water Heater
- 13.8 x 9.8 x 4.8 inches
- 7.95 pounds
- 220 volts
- Ideal for warmer climates
- Warranty: Upon manufacturer request
Why Should You Buy the Titan N-120 Tankless Electric Water Heater?
Besides great value for money, this electric tankless water heater also comes with other interesting advantages you should factor in your purchase decision:
- One of the most popular solutions for average size homes;
- Energy savings on hot water can be up to 60%;
- Recommended for warmer climates where the incoming water temperature is above 65 degrees.
| Pros | Cons |
|---|---|
| Best tankless water heater for average-sized homes | We would have liked more upfront information on the warranty |
| Saves up to 60% in bills | |
| Excellent tech specs for the price | |
| Great temperature control |
Verdict
If you live in a medium-sized apartment or house and you want an efficient tankless water heater that works great and does not take up too much space, then this is the right product for you.
Eemax EEM24013 Electric Tankless Water Heater
Best For: SMALL APARTMENTS
Eemax EEM24013 Water Heater
- 11.5 x 8 x 3.8 inches
- 8.1 pounds
- 240 volts
- Ideal for warm climates
- Warranty: 5 years for leaks and 1 year for parts
Why Should You Buy the Eemax EEM24013 Electric Tankless Water Heater?
The second Eemax electric tankless water heater on our list is the EEM24013 model. It is an ideal choice for small apartments in warmer climates. Moreover, if you want to make only a small investment – because you rent the space or you move out often – this is the right choice for you. But let’s see other tech specs and features!
- Self-modulating technology;
- Its compact size saves valuable storage space;
- Stainless steel construction;
- Handles well point-of-use applications.
| Pros | Cons |
|---|---|
| One of the best tankless electric water heaters for small apartments | May leak |
| Inside usage | |
| Excellent tech specs for the price | |
| Great warranty for leaks and parts |
Verdict
Those who rent homes or move a lot with their work need an electric tankless water heater to meet their needs in terms of efficiency, savings, ease-of-installation, and price. If you recognize yourself in the description, then this Eemax model is the one for you.
Marey Power Pak Plus Tankless Electric Water Heater
Best For: EASY MANAGEMENT
Marey Power Pak Plus Water Heater
- 5 x 12 x 11 inches
- 6.25 pounds
- 220 volts
- Water inlet filter
- Warranty: 1 year for parts
Why Should You Buy the Marey Power Electric Tankless Water Heater?
This product is the best electric tankless water heater for people who want easy management, smooth adjustments, and no-fuss functioning of such a product. Besides the good price and the significant energy bills’ savings it delivers, the product comes with other compelling tech specs and features.
- It features a filter on the water inlet that avoids sediments to damage the unit;
- It is perfect for under the sink (one point of use) installation;
- It requires very low water pressure to activate;
- Ideal for a 1-2 bathroom house in a warm climate;
- More suited for a single point of use if you install it in cooler regions.
| Pros | Cons |
|---|---|
| One of the best tankless electric water heaters with inlet filter against sediments | You should install it with professional help |
| You can wire it to a 10 Amp, 20 Amp, 30 Amp or 40 Amp breaker | |
| Works great for up to 1-2 points of use simultaneously | |
| Versatile and reliable |
Verdict
One of the few electric tankless water heaters that feature water inlet filters, this product is ideal for warm climates. You can use it in colder regions as well, but make sure it fits your hot water requirements in this case. All in all, this is a great product, with enthusiast reviews, and a very compelling price.
ECOTOUCH ECO 90 Tankless Electric Water Heater
Best For: HOME APPLIANCES & SHOWER
ECOTOUCH ECO 90 Water Heater
- 15.7 x 10.2 x 2 inches
- 10.95 pounds
- 240 volts
- Wall-mounted
- Warranty: 1 year
Why Should You Buy the ECOTOUCH ECO 90 Tankless Electric Water Heater?
This last item on our list is a serious contender in the “Best Overall” category, but it should receive more customers’ reviews before a definitive verdict. However, this is indeed a great product if we take a look at the tech specs and features.
- A perfect solution for kitchen & bathroom sinks, dishwashers, and washing machines;
- You can use it for a shower as well, but in warm regions;
- Over-temperature protection;
- Dry heating protection;
- Leakage protection;
- Water and electricity lines are separated;
- ETL approval.
| Pros | Cons |
|---|---|
| One of the best tankless electric water heaters for home appliances | It needs professional installation |
| Sturdy and beautiful structure design | |
| Equipped with smart modulating control for stable temperature | |
| Excellent price |
Verdict
Lightweight, slim, beautifully designed, and hi-tech, this tankless electric water heater has the potential of becoming one of the best such products on the market. It makes terrific promises regarding durability, efficiency, and affordability. You should become one of its supporters, as more and more people are trying this one out over more expensive models.
How to Buy the Best Electric Tankless Water Heater?
- Your electrical infrastructure – it is crucial, because your unit may not work properly if it does not fit into your breaker panel or the correct voltage/amperage of your home;
- You have to pick the right size model for your water heating needs;
- Keep in mind the manufacturers’ recommendations regarding warm vs. cold regions, as not all water heaters work the same;
- You should match the water heater’s flow rate with the flow rate you register in your home (showers, sinks, etc.); it is highly possible that many such units to not work properly with bathtubs given the tubs’ GPM requirements. Our advice is to talk to the manufacturer and a professional plumber before you get a heater for your bathtub or jacuzzi;
- As always, the warranty is vital for such products. However, make sure you or a plumber install the unit correctly to avoid any leaks or problems in the future;
- Remember that hard water can damage, in time, your appliances, plumbing, and other devices. You should discuss with a plumber the possibility of pairing an electric water heater with a water softener or an inlet filter to extend the service life of the water heater.
Bottom Line
Tankless electric water heaters offer on-demand instant hot water without taking up too much space in your home. Moreover, they save you a lot of money, energy, and resources in the process, so you can consider them smart eco-friendly solutions for sustainable homes. If you are already using such products, let us know in the comments your opinion on them!