Top 10 Best Tankless Water Heaters Based On Customer Ratings

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Our team studied on 58874 reviews available online for Tankless Water Heaters, chose the finest ones and prepared Tankless Water Heaters Reviews for you. It was very difficult to shortlist the ideal Tankless Water Heaters from thousands of products online. However, We tried to make sure that you get only the Best Tankless Water Heaters from our suggestions. Check our listings-:

Best Tankless Water Heaters
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Comparison Chart for Best Tankless Water Heaters

In this article we've included our suggestions for the Tankless Water Heaters after analyzing 58874 reviews.

NoProductScoreAction
1Ecosmart ECO Electric Tankless Water Heater9.8Buy From Amazon.com
2Rheem RTEX-24 24kW 240V Electric Tankless Water Heater9.8Buy From Amazon.com
3EcoSmart 8 KW Electric Tankless Water Heater9.8Buy From Amazon.com
4EcoSmart ECO 11 Electric Tankless Water Heater9.4Buy From Amazon.com
5Stiebel Eltron 239223 Tankless Water Heater – Tempra 29 Plus – Electric9.4Buy From Amazon.com
6Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater9.4Buy From Amazon.com
7RINKMO Tankless Water Heater Electric 18KW 240V Instant Residential Electric on Demand Water Heater for Bathroom Bathtub rv Whole House and Point-of-Use Shower Sink Small9.2Buy From Amazon.com
8Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater8.6Buy From Amazon.com
9Rinnai RUS65eN Natural Gas Tankless Hot Water Heater8.4Buy From Amazon.com
10Rheem RTEX-18 18kW 240V Electric Tankless Water Heater8.2Buy From Amazon.com

Table Of Content:

1. Ecosmart ECO Electric Tankless Water Heater

  • 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.
  • 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.
  • EcoSmart ECO 27 Sizing; 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.
  • Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed.
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps
  • NEVER run out of hot water with an ECOSMART tankless water heater.
  • Save up to 12 cubic feet of storage space.
  • Digital temperature control in 1-degree increments gives users complete control of hot water

2. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater

  • 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

3. EcoSmart 8 KW Electric Tankless Water Heater

  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Heating elements are durable and are threaded for easy replacement
  • Activation Flow – 0.3 GPM

4. EcoSmart ECO 11 Electric Tankless Water Heater

  • 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.
  • 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.
  • EcoSmart ECO 11 Sizing; 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.

5. Stiebel Eltron 239223 Tankless Water Heater – Tempra 29 Plus – Electric

  • On demand a continuous and unlimited supply of hot water
  • Sleek design saves space and no venting required
  • Requires hard-wired 240 or 208-volt electric service, with a maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts.
  • Requires 3 separate dedicated 40 amp breakers with 8 gauge copper wiring, and a minimum of 200 amp total service to the residence.

6. Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater

  • This unit is flow activate
  • Save up to 60% on electricity bills for water heating
  • Compact design saves space and is easy to install almost anywhere
  • No electrical connection is required so it’s perfect alternative for those homes experiencing frequent power outages.
  • Unlimited hot water whenever is needed
  • Provide endless hot water on demand and only as needed
  • Allows water temperature to be controlled
  • Rustproof, no water loss due to leaks
  • Works easily with low levels of water pressure
  • 5 years warranty

7. RINKMO Tankless Water Heater Electric 18KW 240V Instant Residential Electric on Demand Water Heater for Bathroom Bathtub rv Whole House and Point-of-Use Shower Sink Small

  • INSTANT ENDLESS HOT WATER: Our RINKMO 18KW tankless water heater requires 2 x 40 AMP breakers and 2 x 8 AWG wire, the Water Flow is 0.
  • MONEY & TIME SAVING EXPERT: Units are designed to be highly efficient by heating water only when it’s needed, no need to preheat, giving you hot water in seconds, not minutes, saving up to 40% energy.
  • 10 TIMES SAFE PROTECTIONS: A Safer water heater, designed for point-of-use especially living with babies.
  • INTELLIGENT & EFFICIENT UNIT: Our smart modulating technology and sensor to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp and flow sensors.
  • POWERFUL for WHOLE HOUSE: Small and mighty, the suitcase-sized wall units fit in many spaces, freeing up more usable living area in your home.

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

  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 8% energy efficient.
  • Threaded for easy replacement, simple installation, digital temperature display 54 A.
  • 54 A

9. Rinnai RUS65eN Natural Gas Tankless Hot Water Heater

  • 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: High-performance 6.5 GPM hot water flow rate for a powerful, constant stream
  • Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation.
  • Guaranteed to Last: 12-, 5-, and 1-year residential factory warranty for heat exchanger, parts, and labor respectively.

10. Rheem RTEX-18 18kW 240V Electric Tankless 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

Tankless Water Heaters Buying Guide


Does the thought of finding a great Tankless Water Heaters stress you out? Has your mind been juggling between choices when it comes to buying Tankless Water Heaters in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Tankless Water Heaters for themselves. We understand the stress associated with the buying process!
Since you’re here, you are obviously curious about Tankless Water Heaters Reviews. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.
There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.
But that’s not always easy, right? That's why we've taken time to compile a list of the best Tankless Water Heaters in today's market, on your behalf, so that there will be no more worries for you.
How did we come up with the list, you ask? How did we create this buying guide?
  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Tankless Water Heaters currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-
  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.
Top Tankless Water Heaters brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.
  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Tankless Water Heaters based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Tankless Water Heaters before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Tankless Water Heaters they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Tankless Water Heaters, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Tankless Water Heaters before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Tankless Water Heaters will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Tankless Water Heaters if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Tankless Water Heaters on the market, the products that got mostly negative ratings get filtered and discarded.

These are the criteria we have chosen our Tankless Water Heaters on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.
Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Tankless Water Heaters featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.