Best Tankless Water Heaters | Expert's Recommendations

Truly finding the tankless water heaters is only effective if you can get your hands on some options, which is exactly what we did.

After researching many products, we shaved the list down to the top 10 options today by researching design, capability, durability, features, price, and overall build quality.

We researched hours on these products and compared them to one another to see which one is the best for every need. Read this tankless water heaters article with an extensive buying guide if you're interested in buying or learning about these tankless water heaters.

# Preview Product Score
1 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...

9.8
2 Hot Water Heater,110V 3000W Mini Electric Tankless Instant Hot Water Heater Bathroom Kitchen Washing (US Plug)(Black)

Hot Water Heater,110V 3000W Mini Electric Tankless Instant Hot Water Heater Bathroom Kitchen Washing...

9.8
3 EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology, 17 x 17 x 3.5

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

9.4
4 Rheem 18kW 240V Tankless Electric Water Heater

Rheem 18kW 240V Tankless Electric Water Heater

9.7
5 EcoSmart ECO 36 Tankless Electric Water Heater, 36 kW 240V

EcoSmart ECO 36 Tankless Electric Water Heater, 36 kW 240V

9.2
6 Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

9.8
7 EcoSmart POU 3.5 Point-Of-Use Tankless Electric Water Heater, 3.5Kw@120Volt

EcoSmart POU 3.5 Point-Of-Use Tankless Electric Water Heater, 3.5Kw@120Volt

9.3
8 Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

9.7
9 Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital Display,Electric Instant Hot Water Heater with Self-modulating,Overheating Protection,White

Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital...

9.3
10 Ecosmart ECO 8EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self Modulating Technology, White

Ecosmart ECO 8EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self...

9.4

List of best tankless water heaters  Reviews

SaleBestseller No. 1

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

  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used. Save up to 50% in water heating costs according to the Department of Energy
  • EcoSmart ECO 11 Sizing; Refer to Sizing Map. Requires 60 AMP Double Pole Breaker, 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature;  refer to the sizing guide to select the proper solution
  • Warranty and Certifications; Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
Bestseller No. 2

Hot Water Heater,110V 3000W Mini Electric Tankless Instant Hot Water Heater Bathroom Kitchen Washing (US Plug)(Black)

  • 【SELLER TIPS】Those who mind will buy with caution! ! !The heating power of this product is constant, the temperature is adjusted by the water flow regulating valve or the tap switch, the high temperature of the water flow is low, and the low temperature of the water flow is high. According to our actual tests, the outdoor water temperature is low, and the water flow should not be too large, which is suitable for daily washing. Those who mind will buy with caution! ! !
  • 【INSTANT & SUFFICIENT HOT WATER】The heating of the product is adjusted by the water flow regulating valve or the faucet switch. Large water flow means low temperature, and small water flow means high temperature. Applied with 3000W heating system, the electric water heater supplies instant, consistent and endless hot water shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those "lukewarm" toys.
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flowing rate and temp setting in real time. thus you still get ideal temperature instead of scalding hot water, which means comfortable experience, simple operation. It is recommended that the product be washed in winter for hand washing, dish washing, face washing and other scenes;Those who mind will buy with caution! ! !
  • 【Eco & Electric & Water Saving】 Safe heater, save up to 55% on your electric cost, water saving, no pollution, no exhaust gas.The heating of the product is adjusted by the water flow regulating valve or the faucet switch. Large water flow means low temperature, and small water flow means high temperature. It is recommended that the product be washed in winter for hand washing, dish washing, face washing and other scenes.
  • 【SAFE AND DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Safe heater, electricity saving, water saving, no pollution, no exhaust gas.The temperature is adjusted by the water flow regulating valve or the tap switch.Those who mind will buy with caution! ! !
SaleBestseller No. 3

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology, 17 x 17 x 3.5

  • Endless on-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 17 x 17 x 3.75 inches 
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used. Save up to 50% in water heating costs according to the Department of Energy
  • EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
  • Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
Bestseller No. 4

Rheem 18kW 240V Tankless Electric Water Heater

  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display
SaleBestseller No. 5

EcoSmart ECO 36 Tankless Electric Water Heater, 36 kW 240V

  • Self Modulating Technology & digital temperature control in 1-degree increments for complete control of hot water for even greater savings and control
  • Save up to 50% on your water heating costs with the most advanced
  • Save space - up to 90% smaller. Easy to maintain, easy-to-replace heating elements. Activation flow is 0. 3 GPM
  • On Demand, endless hot water and Copper and stainless components designed for efficiency, durability and easy replacement. Lifetime for residential use. Breaker recommended 4 x 40 Amps DP
  • 6 GPM tank less water heater provides on-demand, endless hot water. Pipe Fittings: 3/4 inch NPT
Bestseller No. 6

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
  • Bottom 3/4" NPT water connections
  • On demand, consistent and continuous hot water
Bestseller No. 7

EcoSmart POU 3.5 Point-Of-Use Tankless Electric Water Heater, 3.5Kw@120Volt

  • Save up to 45% on your water heating costs
  • NEVER run out of hot water with an ECOSMART tank less water heater.
  • Save up to 12 cubic feet of storage space.
  • Easy to install. Digital temperature display in 1-degree increments
  • Works with low water pressure and activates at 0. 25 GPM
Bestseller No. 8

Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: Up to 11 GPM hot water flow rate for a powerful, constant stream
  • Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.
Bestseller No. 9

Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital Display,Electric Instant Hot Water Heater with Self-modulating,Overheating Protection,White

  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those "lukewarm" toys.
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. The Black model comes with Remote control, useful for installation under sink.
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
  • 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste. It can be mounted horizontally, vertically, obliquely, ideal for kitchen, bar, school, hospital, community and hair salon. Please verify it is the right size for you: 5.5kW@240V; dimensions 11" x 7.5" x 2.35"; pipes fittings :1/2" NPT.
SaleBestseller No. 10

Ecosmart ECO 8EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self Modulating Technology, White

  • Share the warmth with endless hot water at point-of-use
  • Heater requires 1 x 40 AMP double pole breaker (consult electrician if necessary)
  • Save Space - Compact size saves valuable storage space
  • Save Energy - Patented self-modulating technology adjusts energy based on hot water needs
  • Save Time - No venting, unit can be installed directly at the point-of-use

Best tankless water heaters Buying Guide

It's easy to be overwhelmed by the variety of products available online. You can get lost in all the options and not know what you want. That is why it's essential to ask yourself these questions and consider some tips before buying tankless water heaters:

  • How much does it cost?
  • How easy is it to use this product?
  • What is the return policy for this product?
  • Is there customer service support available for this product?
  • What are the benefits of this product over other products on the market?
  • Does the best tankless water heaters  have a warranty or guarantee?
  • Check the features to see if they suit your needs.
  • Consider your budget.
  • Read reviews.
  • Compare brands
  • Make a list of pros and cons.

Ultimately, if you can answer all the questions, congratulations! You have found the tankless water heaters for you! But if not, keep reading because we will provide more helpful information.

Consider the price

When you are on the market, deciding whether to buy the tankless water heaters can be challenging. My first point of discussion will be the price. Before making a purchase, one must determine how much they have and how much they're willing to spend. The problem is that many people don't do this before making decisions about purchasing products, leading them to become indebted later.

 

It's possible that you're debating whether or not you should purchase this product. The answer is that it depends on the things most important to you and why you require the goods. If you are concerned about the price, then the answer is no; you shouldn't purchase it because there are likely other more cost-effective options.

Read reviews

To ensure this is the tankless water heaters, read some reviews to check that other people are happy with their purchase. Real people post reviews on blogs, websites, and social media pages. Reading reviews helps you avoid expensive mistakes on products.

 

When you find yourself in need of a product, knowing which one is best can be challenging. This blog post will teach you how to choose the tankless water heaters based on customer reviews.

 

One way to determine which products are best for you or your family is to read reviews. A customer review is the written opinion of a customer who has purchased and used a product. This can be extremely helpful when choosing between different products, but they are not always readable. There are several ways to read and understand reviews.

Compare brands

We can't deny that reading reviews on different brands is helpful when deciding which one of the products is better, especially if you have more than one choice under your budget of over $300, under $600, or more than $1000. If two brands are equally good, it's best to choose the cheapest option for buying an appliance under $1,000 or a more expensive product over $1,000. If your budget is limited to $500 or less, choosing your favourite brand is best.

Make a list of pros and cons.

This involves listing all the positive aspects of buying one product over another. For example, if you buy an expensive product under $300 with great features, you must consider that its warranty isn't as good as a slightly more expensive product with terms. Better warranty. For example, some devices or electronics are covered by a 90-day warranty, while others have a 12-month warranty. It all depends on your needs and preferences.

Most of the best products are pretty expensive. Making a pros and cons list makes it easy for you to see the strengths and weaknesses of the product, so you can compare and help you make the right choice and avoid wasting time and buying the wrong product quantity.

Does the best product have a warranty or guarantee?

Does the product you are considering have a warranty or guarantee? It's essential to know before making your purchase. There are many guarantees, so you must know what kind of guarantee the store will give you when you purchase.

 

For example, some stores offer a 30-day money-back guarantee with no questions if they are unhappy with their purchase. Other stores may offer an exchange-only policy to replace defective items but not refund customers' money after exchanging them for new ones.

 

Still, other stores may extend limited warranties on products that exceed specific criteria, such as being purchased during a certain time frame or location, regardless of the store warranty or guarantee they offer.

What is the return policy for this product?

As a consumer, knowing your rights when you purchase an item is essential. For example, this product's return policy may differ depending on where you bought it from and how long ago that was. It's always best to research before deciding whether or not something will work out in your favour as far as returns go. Knowing the return policy for any product you are considering purchasing is essential. The return policy for products sometimes is a bit complicated.

Is there customer service support available for these products?

How do you feel when a company lacks customer service for its products? It can be frustrating and lead to feeling left in the dark. The good news is that there are many ways to contact customer support for your product, even if they're not listed on their website or social media.

There are several resources online to find contact information for any company, including customer service numbers and links to their email forms. Contacting them by mail or social media like Facebook Messenger is also available.

What are the benefits of this product over other products on the market?

You're looking for the tankless water heaters but don't know which one to buy. There are many options available on the market today- how do you decide? You want to make sure you purchase a quality product to deliver your desired results.

Manufacturers will walk through all of the benefits of their product over other products on the market so you can see why it is worth your time and effort to invest in them. This gives you an idea about what they offer and provides insight into what makes their company different from others who sell similar products. Their goal is not just for customers to return repeatedly but also to refer their friends to buy the best outcome.

 

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