Best Tankless Water Heater for Your Home

woman having a shower using the best tankless water heater

Image from Pixabay

Most Americans are fine when it comes to the traditional tank water heaters. I mean, it gets the job done of providing hot water on demand.

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However, many home owners are surprised that there’s actually an alternative to the traditional tank water heaters. One that is more energy efficient and will help them save hundreds of dollars every year.

We are, of course, talking about tankless water heaters.

According to the Department of Energy, the best tankless water heater can provide 27%–50% of energy savings and can help a typical family save $100 or more per year. True enough, switching from a traditional hot water tank to a tankless water heater is one of the best ways to save money from your utility bills.

For this post, we shortlisted some of the best tankless heaters that you can buy from the market.

How We Choose Our Ratings

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We pride ourselves as the authority when it comes to heating and cooling solutions. Thus, we are committed to helping our readers make the best purchase decisions. The online marketplace offers a plethora of choices when it comes to heating and cooling products. So, we understand that it can be downright overwhelming to wade through such vast options.

When recommending the best products to our users, we always try to be informative, accurate, and above all, honest. So, we exhaustively research and test our recommended products to ensure that we can come up with a finely curated list that will help readers avoid the dreaded buyer’s remorse.

While on the process of making this list, we considered several key factors like quality, performance, features, and price. Thus, you can trust that it’s hard to go wrong with any of these recommendations.

Let’s jump right to it!

TOP 7 Best Tankless Water Heater

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​SPECIFICATIONS

Weight

​13.75 lbs

Dimensions

​3.62 x 17 x 17 inches

​KW

​27

Temp. Range

80°F – 140°F

Max Amperage

112.5V

Key Features

Key Features

​Digital temperature control, Copper and stainless components, Compact size, Save up to 50% in water heating costs, Limited lifetime warranty

The EcoSmart ECO 27 Electric Tankless Water Heater is a definite bang for the buck as it can help you save up to 50% in water heating costs.

This tankless heater features a flowrate of 3GPM but can jump up to 6GPM when the weather is warmer. So, you can have hot water on demand even if you run two showers simultaneously. The copper and stainless-steel components ensure that the heater is efficient, durable, and can be easily replaced.

The compact size and lightweight design mean that the EcoSmart ECO 27 will not be taking any significant space. It also doesn’t hurt that it features a rather sleek appearance so it’s not a bad thing at all if you can’t conceal the whole thing. Try doing that with a traditional tank heater.

This is a true, self-modulating unit that will surely help you save on utility bills.

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​SPECIFICATIONS

Weight

​19 lbs

Dimensions

​4.62 x 16.62 x 14.5 inches

​KW

​36

Temp. Range

​86°F - 140°F

Max Amperage

​150V

​Key Features

​Sleek design, Virtually silent operation, Copper sheathed heating element housed in a copper cylinder, 7 Years leakage and 3 years parts complete warranty

The Stiebel Eltron Tempra Plus Tankless Electric Water Heater is an excellent unit if you’re looking for something a bit more powerful.

The Tempra Plus is widely recognized as the best tankless water heater and for good reasons. It features a flowrate of 4GPM with the ability to raise the temperature 50F. This is a beast of a water heater but still manages to be quite affordable.

The Tempra Plus has a feature called advanced flow control that allows you to limit the amount of flow. So you can simply set the limit when the heater is not used that often, resulting in even more savings. Think of this feature like an Eco Mode for your heater.

The compact design and decent weight make this unit a breeze to install. Once it’s set up, it runs 100% silent with no mechanical switches. If you don’t mind spending the extra bucks for a very powerful heater, look no further.

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​SPECIFICATIONS

Weight

​8.5 lbs

Dimensions

​4 x 15 x 19 inches

​KW

​18

Temp. Range

​80°-140°F

Max Amperage

​220V

​Key Features

​Instant, continuous hot water, Electronic temperature control, Easy to maintain, Easy installation, Advanced self-modulation

Rheem is another industry leader when it comes to water heaters. The Rheem RTEX-18 Tankless Water Heater is a testament to the brand’s commitment to quality and reliability.

The company claims that this unit is capable of 4.4 GPM of hot water flow but in many real world tests with cold incoming water, it’s fair to expect a performance of 3.0 – 3.5 GPM. That in itself is a solid performance and is more than enough to supply hot water to any room of the house with 2 showers and 2 faucets.

The unit is a self-modulated one which means that it only heats up water when needed, adding more to your savings. Speaking of savings, this heater will help you save up to 50% when compared to a traditional tank water heater. The unit itself looks sleek with the digital temperature display.

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​SPECIFICATIONS

Weight

​6.75 lbs

Dimensions

14.3 x 12.8 x 4.4 inches

​KW

6

Temp. Range

​-

Max Amperage

​240V

​Key Features

​Superior Heating Efficiency, No Venting Required, No Maintenance required, No Corrosion, No Calcium Deposits, Quick & Easy Installation

The Sio Green IR260 POU Electric Tankless Water Heater is for home owners who want more than just a water heater.

The main selling point of this water heater is that it also keeps your water clean. If you are living in an area with particularly hard water, this innovative heater might just be your best choice. The heater is made up of non-metallic and recyclable materials which means that limescale and calcium will not build up inside the unit. This is a significant advantage since it practically makes the heater maintenance free.

The heater uses an infrared quartz element for heating which also prevents that metallic takes that are common with most steel and copper heaters. This can only translate to purer tasting water which is good if you’re particularly sensitive to the metallic taste. The infrared quartz element also helps in preventing corrosion.

It’s not exactly the most powerful heater available but it serves the purpose of a cleaner water.

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​SPECIFICATIONS

Weight

​37 lbs

Dimensions

​6.7 x 13.8 x 20.3 inches

​KW

​-

Temp. Range

​-

Max Amperage

​12​0V

​Key Features

​140,000 BTU, 6.6 GPM max flow rate, Cost-efficient and environment
friendly, Can be converted into a direct-vent unit

If you are in the market for a “middle of the road” tankless water heater, it’s hard to go wrong with Takagi T-KJr2-IN-NG Indoor Tankless Water Heater.

This tankless water heater boasts a 140,000 BTU power, making it one of the more powerful units on this list. The inlet and outlet thermistors enable the heater to get a consistent temperature at all times. This model is capable of generating a maximum of 6.6 GPM which is unbelievable for a sub water heater.

The quality of the product definitely leans on the durable side. The design itself is quite minimalistic and should easily blend with any space.

However, there’s one significant limitation to this tankless water heater, it requires a 4-Inch category III stainless steel venting. If you are not familiar with the installation process, you will end up hiring a certified professional which
drives up the price.

Despite the installation woes, this is a solid natural gas tankless water heater that offers an above-average performance.

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​SPECIFICATIONS

Weight

​82 lbs

Dimensions

​10 x 18.5 x 26 inches

​KW

​-

Temp. Range

​98° F to 140° F

Max Amperage

​12​0V

​Key Features

​Concentric or PVC venting option, Up to 0.96 Energy Factor/Up to 0.92 Uniform Energy Factor, Space-saving design, Ultra low NOx emissions, 199,000 max BTU, 9.6 gallons per minute water flow rate

The Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater is the Ferrari of tankless water heaters.

This Rinnai model is gas powered and it boasts the highest energy efficiency rating we have seen. It features a thermal efficiency of 95% with an Energy Star certificate thrown in. Plus, it also comes with an Energy Factor rating of up to 0.96. We’d go as far as saying that this is the best tankless water heater as far as efficiency goes.

In addition, it has a staggering max water flow rate of 9.8 GPM which just stomps the other model in this list. This also means that it’s more than capable of providing hot water to the largest of households. This is the unit to get if your home has 4 to 5 bathrooms.

With premium performance comes a premium price. This is not a cheap tankless water heater. However, the initial price is dwarfed when compared to the savings that you’ll make over the years.

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​SPECIFICATIONS

Weight

​29 lbs

Dimensions

​15 x 24 x 4 inches

​KW

​-

Temp. Range

-​

Max Amperage

​110V

​Key Features

​Sleek, modern design, Safe electronic ignition system, Fully automatic temperature controls, Easy to use LED display controls, Horizontal stainless steel vent kit included

The Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater is our recommendation for small homes and RVs.

One of the first things that will catch your eye is the sleek design. Seriously, it looks like a tablet with its black tempered glass front panel and the beautiful LED display. In terms of performance, the heater is rated at 3 GPM  which should be more than enough for a small home, apartment, or RV.

What I like about this model are the fully automatic temperature controls which mean a more convenient, hands-free operation. There’s also an energy saving mode to help you save more on utility expenses. There’s also a handy child lock technology in case you have some rowdy children at home.

Overall, it’s a great indoor water heater that’s attractive, easy to use, and delivers good value.

Comparison Table

Product

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Rating

Price

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Go Tankless!

That concludes our list of the top-rated tankless water heaters that you can buy.

Hopefully, this quick guide has helped you find the best tankless water heater for your home. All of these water heaters will likely provide you with great performance and value. Plus, they all have an overall positive rating on Amazon.

If you have any questions about the aforementioned products or about tankless water heaters in general, feel free to use the comment section below.

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