Top 9 Best Electric Tankless Water Heaters Reviews (UPDATED 2018)

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Modern houses nowadays are equipped with an electric tankless heater. It’s more efficient to use. Most models do not consume much space, easy to operate, and energy-efficient. It can help to save on your water bill compared to traditional water heaters.

When you search online for these electric tankless water heaters, you will come across with hundreds of options that might overwhelm you.

To help you choose the best electric tankless water heater for your household, here is a list of the top nine best electric tankless water heater that you should check out:

Best Sellers of Electric Tankless Water Heaters

1EcoSmart ECO 11 Electric Tankless Water Heater

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

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The EcoSmart electric tankless water heater can save up to 60% of your water heating costs thanks to its innovative self-modulating technology. This electric water heater will supply you of endless hot water for your household’s needs.

Aside from that, its compact design will help to save up to 12 cubic feet of storage space. You can adjust the temperature of the water heater by one-degree increment, allowing you to enjoy just the right degree of hot water when bathing.

Furthermore, its 11kw at 220 is equal to 13kw at 240, and activation flow is 0.3 GPP. This water heater requires at least 125-amp electrical panel when you install the product with one 60-amp double pole breaker connected to one set of #6 AWG wire. Buyers can enjoy a lifetime warranty from the manufacturer upon purchasing the product.

Pros

  • Energy-efficient
  • Easy to install
  • Does not consume much space
  • Provides plumbing diagrams
  • Can run non-stop and offer an endless supply of hot water
  • Easy to operate
  • Sold at a reasonable price

Cons

  • Instructions could use some improvement
  • Has leaking issues

2Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

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

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From the most trusted tankless water heater manufacturer in the market, we have the Rheem 240V heating chamber. This residential tankless water heater features an external adjustable digital thermostatic control with LED display (+/1-degree accuracy).

Operating the water heater is comfortable and hassle-free. It has durable copper immersion two heating elements, field serviceable. The self-modulating power control will adjust the level of heat that your household needs.

Installation of the unit is a breeze. The package includes a three-foot electric cable and ½ NPT adapters. It also has side ½-inch compression water connections.

Rest assured that you’ll be able to save on your water heating bills because this unit is 99.8% energy efficient. The unit is also threaded for easy replacement, quick installation, and its digital temperature display makes it more easy to use.

Pros

  • The unit is energy-efficient
  • Rheem customer service is excellent
  • Ideal for a single bathroom use
  • Operating the unit is easy
  • Installation is a breeze
  • Does not consume much space
  • Sold at a reasonable price

Cons

  • Has draining issues
  • Can only accommodate one demand at a time
  • Has seal issues

3Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

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If you have extra budget, check out the Takagi indoor tankless water heater. It provides a maximum BTU’s of 140,000 and minimum BTU’s of 19,500. This is a direct vent type.

The water connection is located at the bottom of the unit. It runs in 6/6 GPM maximum flow rate and requires a four-inch category III stainless steel venting.

This tankless water heater is ideal for residential use. It can also support multiple applications despite its compact design. The T-KJr2 model is the smallest unit available in the Takagi line-up. Rest assured that despite its small size, this water heater can last for years to come.

Pros

  • Easy to install
  • Smart on-demand tankless water heater
  • Provides speedy water flow
  • Can be used for multiple applications
  • Automatically varies the flame size
  • Sold at a reasonable price

Cons

  • Customer service is unresponsive
  • The dipswitches have been set to natural gas instead of propane

4Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

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If you’re looking for a heavy-duty tankless water heater, check out the Rinnai indoor tankless natural gas water heater.

It is one of the few water heaters that has met the California and Texas NOx emissions standards. It has a maximum BTU’s of 150,000 and maximum energy factor 0.82. Aside from that, this water heater is lightweight and compact.

Installation of the product is a breeze. It has a direct electronic hot water capacity of 0.26 to 6.6 GPM minimum activation rate of 0.4 GPM minimum/maximum gas rate. The water temperature of this unit also complies with the South Coast Air Quality management district.

Pros

  • Works in a whisper-quiet operation
  • Ideal for multiple applications
  • Durable and built to last
  • Does not consume much space
  • Does not require a professional to install
  • Sold at a reasonable price

Cons

  • Has condensation issues
  • Takes up to 40 seconds to warm up

5Stiebel Eltron Tempra 24 Plus Whole House Tankless Electric Water Heater

Stiebel Eltron 224199 240V, 1 Phase, 50/60 Hz, 24 kW Tempra 24 Plus Whole House Tankless Electric...

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Check out the Stiebel Eltron tankless electric water heater. It has digital temperature control. The 240V unit has proven its reliability, be it for residential or commercial use. Installing his unit requires no venting at all.

Aside from that, its sleek design will fit any house or commercial building. It does not consume much space as well. Now you can save at least 20% on the hot water portion of your electric bill in the long run.

The water heater works in a silent operation. Its small and compact design makes it easier to install. This unit features an advanced flow control in Tempra Plus that will automatically heat the water.

In that way, you can rest assured that showers are always hot whatever the time it is. Furthermore, it also features an exclusive advanced flow control that will automatically minimize the water flow to maintain the temperature.

Pros

  • Durable and built to last
  • The exterior copper can resist rust and corrosion
  • Works in a silent operation
  • The flow sensor works excellent
  • Does not consume much space and has a sleek design
  • Sold at a reasonable price

Cons

  • Requires professional services for installation

6Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater

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

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We also have the Rinnai ultra-series natural gas tankless water heater. This water heater offers a concentric or PVC venting option. It will help you to save up to 0.96 energy factor and up to 0.92 uniform energy factor.

Thanks to its space-saving design, you can install this unit indoors without any hassle. Aside from that, it also offers ultra-low NOx emissions and has 199,00 max BTU.

While it is not the cheapest model we have in our list, this is one of the few tankless water heaters with an innovative condensing technology that delivers efficient and smooth operation.

Aside from that, it also features 95% thermal efficiency natural gas or indoor propane installation. This unit is designed to meet the California and Texas NOx Emissions Standards. The manufacturer offers a 12-year warranty on the heat exchanger upon purchasing the product.

Pros

  • Installation is quick and easy
  • Instructions are well-written and easy to follow
  • Durable and built to last
  • Has a sleek design for indoor use
  • Works in a quiet operation

Cons

  • Has a slight drop in water pressure
  • Not suitable for multiple applications

7Rheem RTEX-18 240V 2 Heating Chambers Residential Tankless Water Heater

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

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Another product that we’re featuring from Rheem, we have the RTEX-18 240V heating chambers. Similar to other Rheem products, it features an external digital thermostatic control with LED display (+/1-degree accuracy).

It is also one of the few tankless water heaters with a self-modulated adjust power. This unit will ensure to meet your household’s demand for hot water regularly.

This unit is easy to install. You don’t need to hire a professional plumber to do so. It has durable copper immersion two heating elements and fields serviceable. Rheem products, just like this one, are threaded for easy replacement.

It will take you less than a day to install the unit. Plus, all the needed hardware for the installation are already included in the package.

Pros

  • No clicking relays
  • Operates in total silence
  • Easy to install
  • Ideal for multiple applications
  • Sold at a reasonable price

Cons

  • Has some mounting issues
  • The wiring diagram can cause the unit to be unresponsive

8Sio Green IR260 POU Electric Tankless Water Heater – Infrared Tank-Less Instant Hot Water Heater

Sio Green IR260 POU Electric Tankless Water Heater - Infrared Tank-Less Instant Hot Water Heater -...

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Take a look at this Sio Green IR260 electric tankless water heater. It features an insta-infrared heating design that uses 110 volts and heat. In that way, you’ll be able to enjoy hot water anytime you want!

Thanks to its patented technology, you don’t need to worry about coil metallic elements or even maintenance at all! Once installed, rest assured that this unit will provide you with an endless supply of hot water for your household.

Furthermore, this unit is designed to resist calcium buildup. You spent $0 on the maintenance. It doesn’t even require a filter or some replacement parts, unlike other water heaters!

This ultra-practical and space-saving water heater is an economical choice, especially if you’re on a tight budget. Its compact and sleek design made it easy to install, even for a DIY enthusiast like you.

Pros

  • Easy to install
  • Requires no maintenance
  • Can resist rust and corrosion
  • Made of durable materials and built to last
  • Does not take much space
  • Has user-friendly interface
  • Sold at a reasonable price

Cons

  • Not ideal for big household
  • Has problems with correct water pressure

9Bosch Electric Tankless Water Heater – Eliminate Time for Hot Water

Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation

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Lastly, we have the Bosch electric tankless water heater. This tankless water heater will provide you with the convenience of having hot water anytime you need. The 3.2 kW output tankless electric water heater will eliminate the waiting game when it comes to hot water.

As for the installation of the unit, you don’t need to worry a thing. You can install it quick and hassle-free in your bathroom or kitchen sink without even hiring a professional plumber.

Moreover, this unit is space-saving. You can mount it vertically or horizontally on your wall, thanks to its ultra-compact and lightweight design. This tankless water heater is 985 efficient with minimal standby loss. Its water pressure can range of 10-150 PSI.

Pros

  • Has a sleek and lightweight design
  • Easy to install
  • Does not require any maintenance
  • Durable and built to last
  • Does not consume much space
  • Ideal for customers on a budget

Cons

  • The bathtub may take a while to fill
  • Can only accommodate one demand at a time
  • Does not have a thermostat

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