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  13. Top 10 Best Tankless Water Heaters

Top 10 Best Tankless Water Heaters

#1 Best Product
Best Point of Use Heater
#3 Best Product
Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
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Scores calculated from 10924 reviews

Top Choice
1

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe

  • Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe
  • Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe
  • Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe
  • Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Twin Pipe
Specifications:
Manufacturer: Rinnai
EAN: 0766156008160
UPC: 766156008160
Model: RUC98iN
Part Number: RUC98IN
Size: Twin Pipe/Ultra
Warranty: Residential: Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)<br>Commercial: Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)
Height: 2 feet 2 inches
Width: 1 foot 6 inches
Length: 10 inches
Best Point of Use Heater
2

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
Specifications:
Manufacturer: Rheem
EAN: 0020352685328
UPC: 020352685328
Model: RTEX-13
Part Number: RTEX-13
Height: 1 foot 1 inch
Width: 9 inches
Length: 4 inches
3

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White

  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
  • Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White
Specifications:
Manufacturer: Stiebel Eltron
EAN: 0040232668616
UPC: 040232668616
Model: 24 Plus
Part Number: 239222
Size: 20.2
Height: 1 foot 2 inches
Width: 1 foot 4 inches
Length: 4.63 inches
Best Rinnai
4

Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation

  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
  • Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation
Specifications:
Manufacturer: Rinnai
EAN: 0766156007095
UPC: 766156007095
Model: V65IN
Part Number: V65IN
Size: Large
Warranty: Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)
Height: 1 foot 11 inches
Width: 8.8 inches
Length: 1 foot 1 inch
Best Electric Model
5

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

  • EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
Specifications:
Manufacturer: Ecosmart
EAN: 7426926095624
UPC: 854920002022
Model: ECO 11
Part Number: ECO 11
Size: 12 x 8 x 4
Warranty: Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.
Height: 11.5 inches
Width: 8 inches
Length: 3.75 inches
Best Gas Model
6

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

  • Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute
Specifications:
Manufacturer: Takagi
EAN: 0671657140946
UPC: 671657140946
Model: T-H3-DV-N
Part Number: T-H3-DV-N
Size: Medium
Height: 2 feet
Width: 1 foot 5 inches
Length: 11.25 inches
7

ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White

  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
  • ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V, White
Specifications:
Manufacturer: ECOTOUCH
EAN: 0631105420426
UPC: 631105420426
8

Titan N-120 Tankless Water Heater, 220 V, 54 Max Amps

  • Titan N-120 Tankless Water Heater, 220 V, 54 Max Amps
  • Titan N-120 Tankless Water Heater, 220 V, 54 Max Amps
Specifications:
Manufacturer: Titan
EAN: 0713356111404
UPC: 713356111404
Part Number: N-120
9

Girard 2GWHAM On-Demand Tankless Water Heater

  • Girard 2GWHAM On-Demand Tankless Water Heater
  • Girard 2GWHAM On-Demand Tankless Water Heater
Specifications:
Manufacturer: GIRARD PROD
EAN: 0846611000561
UPC: 846611000561
Model: 2GWHAM
Part Number: 2GWHAM
Height: 1 foot
Width: 1 foot 10 inches
Length: 1 foot 3 inches
10

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY

  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
Specifications:
Manufacturer: Rheem
EAN: 0020352685335
UPC: 020352685335
Model: RTEX-18
Part Number: RTEX-18
Size: Small
Height: 1 foot 7 inches
Width: 1 foot 3 inches
Length: 4 inches

Best Tankless Water Heater Reviews

For most of us, hot water is a huge part of our everyday lives. Think about it. We rely on it to clean our dishes, wash our clothes and relax our bodies when we step into the shower or bathtub. Without hot water, it'd be difficult to maintain a healthy household.

 

Most homes rely on large water heaters that are often located in basements and are too large to install without a technician. Tankless water heaters, however, are a safe alternative to the more traditional heating methods. They often take up less space and are equipped with easy installation instructions. That's not to say all tankless water heaters are perfectly efficient or can only be installed in small spaces. Different models provide different results. Top10.today has ranked some of the highest rated heaters on the market for every type of homeowner. Check out our list below to see which option would work best for you.

 


 

Our Highest Rated Tankless Water Heaters

 


 

Best Point of Use Water Heater -

Rheem Professional Class Series RTEX-13 Tankless Water Heater

 

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

 

Features

Specifications

  • Electric Power
  • Digital LED Display With ON/OFF Dial Control
  • Self-Modulating Power Control
  • Adjustable Temperature By 1° Increments
  • 98.8% Energy Efficient
  • Dimensions: 4 x 9 x 13 Inches
  • 4 Pounds
  • 240 V, 13 KW, 54 A
  • 1/2 NPT Adapters Included
  • Side 1/2 Compression Water Connections
  • Flow Rate: 1.5 GPM
  • 36-Inch Cord

 

Choosing the correct water temperature for your laundry is critical. The last thing you want is to have a colored clothing item turn all your white clothes a different color. Hot water also removes germs and dander that cold water simply won't. For laundry rooms that need an extra boost for their water temperature regulation, we recommend a point of use water heater.

 

The Rheem RTEX-13 is small enough to move from one place to another and takes up almost no space. It comes with a digital temperature setter that you can adjust by a single degree. The best feature on this Rheem tankless water heater is its energy efficiency, which is eco-friendly and will save you money on water bills. Aside from laundry rooms, this heater also works great under the sink in your kitchen or bathroom.

 

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Best Rinnai Tankless Water Heater -

Rinnai V Series HE Natural Gas Tankless Water Heater

 

Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation

 

Features

Specifications

  • Natural Gas Power
  • Energy Star Certification With .82 Energy Factor
  • Concentric or PVC Venting Option
  • Space-Saving Design
  • Integrated Error Code Indicator
  • Limited Warranty
  • Dimensions: 13 x 8.8 x 23.6 Inches
  • 49.4 Pounds
  • 120 V
  • Flow Rate: 6.5 GPM
  • Temperature Range: 98°-140°
  • BTUs: 10,300 min, 150,000 max

 

Rinnai is among the top tankless water heater brands. If you spend enough time researching, you will discover Rinnai creates a wide range of water heater models varying in size but never compromising in energy efficiency.

 

For larger residential water heating, you will need a water heater with a decent gallon capacity. The best tankless water heaters, though they usually don't take up much space, are capable of quickly heating water through high-tech approaches. The Rinnai V Series HE model is at the top of the brand's products and ranks high on Rinnai tankless water heater reviews. It is Energy Star certified and safely heats your home's water at a 6.5-gallon-per-minute turnaround. Plus, you can install it on your own by reading the included manual.

 

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Best Electric Tankless Water Heater -

EcoSmart ECO 11 Heater

 

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

 

Features

Specifications

  • Electric Power
  • Adjustable Temperature By 1° Increments
  • 99.8% Energy Efficient
  • Used in Colder Climates as a Point of Use for Sinks
  • Lifetime Limited Warranty
  • Dimensions: 3.8 x 8 x 11.5 Inches
  • 6.5 Pounds
  • 240 V, 13000 W
  • Max Amperage: 57
  • Required Breaker: 1 x 60 AMP
  • Wire Gauge: 1x6 AWG
  • Flow Rate: 2 GPM
  • Temperature Range: 100°-185°
  • Water Connections: 1/2" CF

 

Water bills can be daunting. You never quite know how much you are going to be paying each month for your home's water usage. Consumer Reports estimated the cost of water heating to take up nearly 20 percent of a household budget. Thankfully, though, there are high-tech devices out there to save you time and money on all the resources you use in your home.

 

The EcoSmart ECO 11 is an electric tankless water heater that supports small spaces, including bathrooms, laundry rooms and even offices. This model comes with a digital display that shows temperature, which can be adjusted in 1° increments. This feature allows for precise water temperature monitoring, saving you money each month on your bill.

 

EcoSmart also breaks down different heater sizes on their website, based on the climate of where you live. For colder climates, the amount of fixtures, or Gallons Per Minute (GPM), heated water will be more limited. It is important to refer to the ECO 11 map to determine which size model will work best for you. For any additional needs, you can also purchase replacement parts on their website.

 

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Best Gas Tankless Water Heater -

Takagi T-H3-DV-N Indoor Natural Gas Tankless Water Heater 

 

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

 

Features

Specifications

  • Energy Star Certified
  • Gas-Powered
  • Condensing Technology
  • On-Demand Usage for Endless Hot Water
  • Saves You Space
  • Copper and Stainless Heat Exchanger
  • Direct Vent of 4"
  • Condensing Technology
  • Dimensions: 11.2 x 17.8 x 24.9 Inches
  • 59 Pounds
  • 120 V
  • Flow Rate: 10 GPM
  • Temperature Range: 100°-185°
  • BTUs: 199,000 max, 19,500 min
  • Emissions: Ultra-Low NOx
  • Water Connection: 3/4" at Bottom

 

Want endless hot water? If you live in a large household with lots of people or enjoy taking long showers without worrying about running out of water, this gas water heater will work great for your home. The Takagi T-H3-DV-N tankless water heater is a compact device that does not run short on providing hot water flow throughout your home. It strives to conserve energy while also heating a large amount of water on a continuum.

 

A Takagi water heater will not let you down in terms of durability, either. This set also comes with a variety of computerized safety features, which include: free, overheat, surge protection and troubleshooting diagnostic codes. Even if you have a load of laundry in, you can still safely take a long shower and not worry about it running cold.

 

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CONS

 


Best Tankless Water Heater for Large Homes -

EcoSmart ECO 27 Tankless Water Heater

 

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology

 

Features

Specifications

  • Energy Efficient
  • Electric-Powered
  • Adjustable Temperature By 1° Increments
  • Configured for Cold Climates
  • Accommodates Demanding Water Usage Outlets
  • Lifetime Warranty
  • Dimensions: 3.6 x 17 x 17 Inches
  • 11 Pounds
  • 240 V, 27,000 W
  • Max Amperage: 112.5
  • Required Breaker: 3 x 40 AMP
  • Wire Gauge: 3x8 AWG
  • Flow Rate: 3 GPM in Northern States; 6 GPM in Southern States
  • Temperature Range: 80°-140°
  • Water Connections: 3/4" NPT

 

If you have a large home or need to heat water in an area that requires constant hot water, like a hot tub or spa, the EcoSmart ECO 27 is the perfect model for you. At eleven pounds, it is much larger than the EcoSmart ECO 11, the other EcoSmart tankless water heater our list, but its size serves a purpose. It can accommodate nearly any climate, but because of its larger Gallons Per Minute (GPM) rate, EcoSmart recommends this model for people living in colder climates.

 

In northern states, where incoming water temperatures reach as low as 37°, the EcoSmart ECO 27 runs 3 GPM, providing enough hot water for two showers running simultaneously. For warmer climates, where incoming water typically reaches a low of 45°, like in southern states, it runs 6 GPM, providing double the amount of hot warer than in colder climates. The best part? EcoSmart strives for energy efficiency, saving you money and stress over your next water bill.

 

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Frequently Asked Questions

 

Is it worth getting a tankless water heater?

If you look around the Internet, you will discover that the overall cost for a tankless water heater may be higher than tank models. Over time, however, tankless water heaters save customers more money because of their durability and energy efficiency. Plus, there are plenty of tankless water heater models that are small enough to fit under a sink or in other smaller spaces, giving customers more options based on their living space.

 

It's important to also consider which tankless water heater will work best for your home. You may be confused and wonder amid all the different models out there: What size tankless water heater do I need? Most brands, like EcoSmart, will supply a guide based on the climate you live in, for which size and type of heater would be best to purchase. If you have had your current water heater for a long time and it might need repair soon, that may be a good time to consider switching to a tankless water heater. Keep in mind that with a tankless water heater, you won't have to worry about water spilling over to your floor in emergency cases. But before you purchase one, it's important to consider consider electric versus gas models, the flow rate, or amount of water that will be heated, and the energy rating.

 

What are the advantages and disadvantages of a tankless water heater?

One of the best overall features of having a tankless water heater, aside from their small size, is their ability to economize your water use. As space-saving tools, tankless water heaters work to provide hot water at exactly where it is used. This saves customers money in the end because it prevents them from having to run water until it gets to a hot temperature. These devices also provide unlimited hot water, so long as not too many other outlets are asking for hot water.

 

A potential disadvantage to tankless water heaters is that, unless they are really large, they typically do not provide enough hot water to simultaneously heat more than one or two outlets at a time. Some models do not include a specified temperature control, meaning there won't always be a consistent temperature.

 

What is the average cost to install a tankless water heater?

Costs for a tankless water heater installation will vary by model and size. Some models, particularly lightweight ones, can be installed independently. For larger models, often times the manufacturer will recommend hiring a plumber or technician to install, which will vary by their hourly or flat rate. Consumer Reports states that HomeAdvisor estimates a $800 to $1,500 installation cost, depending on the model and size.

 

Tankless water heaters prices' can range anywhere from $150 to $3,000. Again, it depends on what kind of power you want your device to run on and how many outlets you want to supply heated water to at any given time.

 

What is the best tankless water heater?

Among the top tankless water heater brands are Bosch, Takagi, Rinnai, Rheem, Stiebel and EcoSmart. The best models will vary upon your individual needs. Top10.today has ranked some of the best tankless water heaters on the market, based on their size, cost and energy efficiency. No matter what you are looking for, there is guaranteed to be a model out there that will accommodate your home.

Here is a brief breakdown of the best tankless water heater models:

Rheem Professional Class Series RTEX-13 Tankless Water Heater

Rinnai V Series HE Natural Gas Tankless Water Heater

EcoSmart ECO 11 Heater

Takagi T-H3-DV-N Indoor Natural Gas Tankless Water Heater 

EcoSmart ECO 27 Tankless Water Heater

 


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