Top 10 Best Whole House Electric Tankless Water Heater – Available On Market

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Best Whole House Electric Tankless Water Heater
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NoProductScoreAction
1CRAFTSMAN 36kW 240-Volt 7.3 GPM Electric Tankless Water Heater9.8Check Amazon Price
2Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater9.4Check Amazon Price
3RINKMO Electric Tankless Water Heater 18KW 240V Instant Residential Electric on Demand Water Heater for Bathroom Bathtub rv Whole House and Point-of-Use Shower Sink Small9.2Check Amazon Price
4Eemax HA036240 240V 36 kW Electric Tankless Water Heater9.2Check Amazon Price
5Eemax EEM24027 Electric Tankless Water Heater9Check Amazon Price
6Rheem RTEX-18 18kW 240V Electric Tankless Water Heater8.6Check Amazon Price
7Rinnai RL94IN Tankless Hot Water Heater8.6Check Amazon Price
8Tankless Water Heater Electric 27kW 240 Volt8.4Check Amazon Price
9Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric8.2Check Amazon Price
10Rheem RTEX-24 24kW 240V Electric Tankless Water Heater8.2Check Amazon Price

1. CRAFTSMAN 36kW 240-Volt 7.3 GPM Electric Tankless Water Heater

  • Warm to hot climates – serves up to 3-4 bathrooms | Cool to cold climates – serves up to 3 bathrooms.
  • Requires a 240-Volt service with four 40 Amp double-pole breakers and four 8/2 AWG wires
  • 35° F Temperature Rise – 7.
  • Digital control panel allows you to easily set the desired temperature up/down in increments of 1 degree F from 90 – 122 degrees.
  • Durable assembly with stainless steel, non-corrosive, lead free internal canisters and piping with standard 3/4 in.

2. Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
  • 150 A

3. RINKMO Electric Tankless Water Heater 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.

4. Eemax HA036240 240V 36 kW Electric Tankless Water Heater

  • Endless hot water
  • Brand name: Eemax
  • Model number: HA036240
  • Country of Origin: United States

5. Eemax EEM24027 Electric Tankless Water Heater

  • Tank less water heaters provide a continuous Supply of hot water and only heats the water you need, when you need it.
  • Instant, consistent and endless hot water
  • The most advanced, self-modulating technology available, meaning the unit will adjust how much energy needs to be input based on how much hot water is needed.
  • Compact size saves valuable storage space
  • Before purchase and installation, Please verify that this EEM24027 is the correct size for your hot water needs.

6. 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

7. Rinnai RL94IN Tankless Hot Water Heater

  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance 9.8 GPM hot water flow rate for a powerful, constant stream
  • Instant Heating: Circ-Logic technology enables recirculation patterns that coincide with your typical habits; Wi-Fi monitoring creates hot water on demand.
  • Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, parts, and labor respectively.

8. 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.

9. Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric

  • CONTINUOUS FLOW – Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort.
  • 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.
  • EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use.
  • TEMPRA 24 PLUS – This specific model is 24kW, 240V, requires a min recommended electric service of 150 A, and offers an output water temperature of 68° to 140°F.
  • WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability.

10. 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

How To Choose The Best Whole House Electric Tankless Water Heater

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

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

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