Top 10 Best Electric On Demand Water Heater Reviews With Scores

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Our team studied on 50623 reviews available online for Electric On Demand Water Heater, chose the finest ones and prepared Electric On Demand Water Heater Reviews for you. It was very difficult to shortlist the ideal Electric On Demand Water Heater from thousands of products online. However, We tried to make sure that you get only the Best Electric On Demand Water Heater from our suggestions. Check our listings-:

Best Electric On Demand Water Heater
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Comparison Chart for Best Electric On Demand Water Heater

In this article we've included our suggestions for the Electric On Demand Water Heater after analyzing 50623 reviews.

NoProductScoreAction
1Rheem RTEX-18 18kW 240V Electric Tankless Water Heater9.8Buy On Amazon
2EcoSmart ECO 11 Electric Tankless Water Heater9.6Buy On Amazon
3Tankless Water Heater Electric 27kW 240 Volt9.6Buy On Amazon
4Tankless Electric Water Heater 18KW 240 Volt9.6Buy On Amazon
5Ecosmart ECO Electric Tankless Water Heater9.4Buy On Amazon
6Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater9.2Buy On Amazon
7Stiebel Eltron Tankless Water Heater - Tempra 15 Trend – Electric8.8Buy On Amazon
8Rheem RTEX-24 24kW 240V Electric Tankless Water Heater8.8Buy On Amazon
9RINKMO 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 Small8.8Buy On Amazon
10Airthereal Electric Tankless Water Heater 14kW8.2Buy On Amazon

Table Of Content:

1. 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

2. 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.

3. Tankless Water Heater Electric 27kW 240 Volt

  • Instant Unlimited Hot Water] – REQUIRE 3 SET x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower.
  • Self-modulating Power] – Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.
  • Stable Water Temperature] – Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage.
  • Easy Installation & Safety Protection] – ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection.
  • NOTE – Make sure this water heater is the correct size for your hot water need: 27kW at 240V draw max 114Amp; Required breaker 3 x Double-POLE 40AMP; Wire gauge 3 x 8AWG; Unit size 17.

4. Tankless Electric Water Heater 18KW 240 Volt

  • Efficient & Large Capacity Tankless Water Heater: Applied with 18KW heating system, the electric water heater supplies instant, consistent and 24h endless hot water of 80-140℉suitable for whole house using, even using more sinks and showers simultaneously, no waiting for preheating nor terrible temp up and down dramatically, the perfect companion for sinks.
  • Compact & Energy Saving: 11″*7.
  • Convenient & Easy to Use: The tankless water heater comes with a digital display and knob control panel so the temp setting is quite an easy job.
  • Premium Electric Water Heater: ETL FCC test passed, this tankless water heater is crafted with an excellent stainless steel case and inner copper devices, making it anti-rust, high-temperature resistant, no water leakage, durable and fast to heat, this hot water heater is perfect for showering, pet washing, outdoor cleaning, camping and trip road, etc.
  • Safe & Durable Operation: Applied with multiple protection devices like over-heating auto-stop, no water auto-stop, power-off memory function, every piece goes through strict tests to ensure 100% safe.

5. 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

6. 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

7. Stiebel Eltron Tankless Water Heater – Tempra 15 Trend – Electric

  • CONTINOUS FLOW – Hot showers will never be interrupted again.
  • SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required.
  • SILENT OPERATION – One electronic switch will activate the hot water heater and it’s noise free while in use.
  • TEMPRA 15 TREND – This specific model is 14.
  • WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability.

8. 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

9. 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.

10. Airthereal Electric Tankless Water Heater 14kW

  • Endless Hot Water: Imagine you are the last one in your family to take a shower before heading out for the day.
  • Save Space: That water heater in the basement or utility closet takes up a ton of space.
  • Save Energy: Water is only heated when you need it, not stored in a hot water tank.
  • Important Note: In order to install 14kW Electric Tankless Water Heater it would requires 240 Voltage, 60 AMP Circuit Breaker Size and a set of 6AWG/2 wires.
  • Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule.

How To Choose The Best Electric On Demand Water Heater

Does the thought of finding a great Electric On Demand Water Heater stress you out? Has your mind been juggling between choices when it comes to buying Electric On Demand Water Heater 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 Electric On Demand Water Heater for themselves. We understand the stress associated with the buying process!

Since you’re here, you are obviously curious about Electric On Demand Water Heater. 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Electric On Demand Water Heater, 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 Electric On Demand Water Heater before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Electric On Demand Water Heater 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 Electric On Demand Water Heater 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 Electric On Demand Water Heater on the market, the products that got mostly negative ratings get filtered and discarded.
These are the criteria we have chosen our Electric On Demand Water Heater 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 Electric On Demand Water Heater 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.