Reviews of the Best Tankless Water Heaters of 2020

Published by Alexa Bartel on

Reviews of The Best Tankless Water Heaters of 2020

Switching from a traditional hot water tank to a tankless model is one of the best things you can do for your home and your water. A tankless water heater will heat your water without taking up too much room in your home or driving up your energy bills. That said, there are so many of these units on the market that it can be hard to identify the best tankless water heaters for your home.

We understand how intimidating it can be to pick the right tankless water system for your home, which is why we put together a guide of tankless water heater reviews to make your purchase decision easy.

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  • Can meet any residential house’s need
  • Produced by an industry leader in water heaters
  • Hassle Free Warranty Process
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  • No Expansion Kit Required
  • Very Silent
  • Dual Pipe makes unit more efficient by using condensation water
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  • Best in class flow rates for electric tankless
  • Trusted by many verified online purchases and reviews
  • Great warranty for peace of mind
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  • Great value – flow rate and quality for the price
  • Trusted by many verified online purchases and reviews
  • Great warranty for peace of mind
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  • One of the best brands in water heaters
  • Standard 10 year warranty
  • Leading energy efficiency rate at 94% (Compared to other outdoor units)
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  • One of the best brands in water heaters
  • Strong flow rate at 8.6 GPM
  • Does not require any ventilation, since it is outdoor.
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  • One of the most powerful tankless heaters below $500 price mark
  • Built by a reputable brand name
  • Comes with a standard 10 year warranty
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  • One of the smallest units
  • Well reviewed by thousands of users
  • Industry leading warranty
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  • Maintenance free water heater
  • Well reviewed by thousands of users
  • Industry leading warranty
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  • Powerful unit capable of handling any incoming water temperature
  • Backed by one of the biggest names in water heaters
  • Industry leading warranty
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10 Best Tankless Water Heaters
Reviews of 2020

If you are looking for the best gas tankless water heater for your home, look no further than the Rinnai RUR98iN Ultra Series. This model is considered by many to be one of the best ever produced for residential use. Armed with an impressive 96% efficiency factor and the ability to provide 9.8 GPM ( gallons per minute ) of hot water flow at nearly any incoming water temperature, this tankless water system by Rinnai is capable of replacing traditional hot water heaters in nearly any climate.

A stand out feature that’s unique to this water heater is its Wifi Capabilities. This feature allows you to monitor and change your water heating settings over your home network. The system also boasts an innovative re-circulation line which allows this unit to produce an endless supply of hot water. It’s worth considering that very few tankless water heaters that offer these luxurious features — the investment will easily pay for itself in both savings and ease of use.

The Pros

  • Can meet any residential needs
  • Produced by an industry leader in water heaters
  • Hassle Free Warranty Process
  • No Expansion Kit Required
  • Quiet
  • A Dual Pipe makes the unit more efficient by using condensation water

The Cons

  • Most expensive unit you will find for residential use
  • Requires venting and does not come with a venting kit
  • Might be excessively powerful for smaller homes
For more details, read our in depth review on this product here.

We can say with confidence that if you’re looking to provide on-demand hot water for your whole house, then the Rinnai RUC98iN Ultra Series is the unit for you.

With the ability to produce a staggering 9.8 GPM of hot water with a temperature rise of 50 Degrees Fahrenheit, this natural gas tankless water heater is perfect for nearly every home. Many of these tankless water systems aren’t capable of providing hot water for an entire house, due to the fact that most natural gas tankless models don’t have the same gallons per minute flow rate as this unit.

We recommend professional installation since this unit requires a natural gas hook up. It’s important to note, as with any tankless water heater, that it may take up to 20 seconds for the water to heat up from this heating unit to the faucet. That said, once it’s warmed up, this natural gas tankless water heater will provide an unlimited amount of hot water and slashed energy bills.

The Pros

  • Can meet nearly any capacity need
  • Produced by an industry leader
  • Hassle Free Warranty Process
  • No Expansion Kit Required
  • Quiet
  • Dual Pipe makes unit more efficient by using condensation water

The Cons

  • Most expensive unit you will find for residential use
  • Requires venting and does not come with a venting kit
  • Gas water heating might be excessively powerful for smaller homes

For more details, read our in depth review on this product here.

Electric based tankless water heaters have been making strides in recent years. For example, the Stiebel Eltron Tempra Plus has made waves as one of the best electric water heaters in the industry. It is, after all, Stiebel Eltron’s flagship product.

With capabilities to provide an impressive 4.0 Gallons Per Minute and attain incoming water temperatures of 72 Degrees Fahrenheit, this is truly one of the most powerful and efficient electric water systems available on the market today.

The best feature of the Stiebel Eltron Tempra tankless model is its easy to use digital controls. Its small and sleek design allows you to install it nearly anywhere, from under the sink to behind a furnace or in a small utility closet. It uses solar as a power source, making it highly efficient — in fact, it can nearly match the utility costs of natural gas tankless water heaters or, in some cases, outperform them significantly.

Pros

  • Best in class water flow rate
  • Trusted by many verified online purchases and reviews
  • Great warranty for peace of mind
  • Industry leader

Cons

  • Slightly more expensive than other tankless models
  • Will require 2+ units to provide for an entire house

For more details, read our in depth review on this product here.

If you are in need of a simple water heater to put under your sink or in a new powder room, then at 240-volts, the EcoSMART ECO model is the right unit for you. This unit is perfect even if your incoming water temperatures are quite cold, because it is able to provide a 1.5 GPM flow rate with a temperature rise of 50 degrees Fahrenheit.

Generally, this type of water system isn’t capable of handling high gallons per minute flow rate. For simple purposes, however, this unit from EcoSMART will be more than enough for nearly any home — regardless of its incoming water temperature.

EcoSMART is a highly trusted brand, and for good reason. Their system has been a best seller for three years straight, and as is known as one of the most efficient units on the market — it even has the reviews to back it up!

Pros

  • Great value, flow rate and quality for the price
  • Trusted by many verified online purchases and reviews
  • Great warranty for peace of mind

Cons

  • Somewhat unknown brand
  • Larger unit than expected
For more details, read our in depth review on this product here.th

The Rheem RTGH-95XLN Prestige is one of the best outside tankless units you can find on the market. In addition to being high quality and well rated, it also boasts a high energy factor (94%) and one of the highest flow rates (9.5 GPM). The best part? The water heating system requires no ventilation and can meet the needs of most homeowners!

Pros:

  • One of the most trusted brands in the business
  • Standard 10 year warranty
  • Leading energy efficiency rate at 94% (Compared to -other outside units)
  • High energy factor & high flow rate at 9.5 Gallons Per Minute
  • Does not require any ventilation

Cons

  • While it seems expensive up-front, the high energy efficiency will make it cheaper over time.

For more details, read our in depth review on this product here.

If you’re considering a tankless water heater for outside to save a few dollars, then the Rheem RTG-84XLN is the right choice for you. With a strong flow rate of 8.4 GPM, which is satisfactory for most homeowners, this “middle of the road” unit with strong efficiency and low emissions is ideal.

One of this model’s best features is its remote control capabilities — this is best in the winter when you don’t have to go outside to adjust your settings. There’s a lot to love about the water heating system that boasts an environmentally conscious design to ensure efficiency and low emissions.

Compared with a hot water tank run on natural gas, this model will not only save you a ton of money, but save tons of carbon from being emitted into the atmosphere as well.

Pros:

  • From leading brand Rheem
  • Standard 10 year warranty
  • Leading energy efficiency rate at 84% (Compared to other units)
  • Strong flow rate at 8.6 Gallons Per Minute
  • Does not require any ventilation

Cons

  • May not last as long in harsher climates

For more details, read our in depth review on this product here.