Whole House Electric on Demand Water Heater Reviews

Imagine having the ability to install your water heater nearly anywhere in your abode without having to worry about infinite, ventilation, or even the threat of gas leaks. Those are just a few of the benefits y'all'll enjoy when you find the best electric tankless h2o heater for your property.

Replacing your existing h2o heater with a new and improved unit of measurement is something that many homeowners and commercial holding owners should consider. There's nothing more comforting than knowing you'll take an countless stream of hot h2o, without having a large utility nib at the finish of the month.

Best Electric Tankless Water Heater

Best Value

Model

Stiebel Eltron Tempra Plus 24

Minimum Activation

.l GPM Minimum Activation

.thirty GPM Minimum Activation

Warranty

Warranty: 7-yr leakage / iii-yr parts

Limited Lifetime Warranty

Model

Stiebel Eltron Tempra Plus 24

Minimum Activation

.fifty GPM Minimum Activation

Warranty

Warranty: 7-yr leakage / 3-twelvemonth parts

Best Value

Minimum Activation

.xxx GPM Minimum Activation

Warranty

Limited Lifetime Warranty

You should ever seek the help of a professional person for installation. The majority of electric h2o heaters require a dedicated breaker in order to protect the other circuits in your domicile.

Our Top Electric Water Heater Picks

There are enough of models on the market place today, and each has a dissimilar blueprint and a diversity of options. Selecting the right tankless for your household tin seem like a daunting task. That'southward why we've curated a list of the top four electric tankless water heater models that we think accept a lot to offer.

Virtually of these models can be purchased in larger or smaller sizes to permit yous to find the exact fit for your home's hot water needs.

Bosch Tronic 6000C WH27

Every bit one of the height-tier brands when it comes to dwelling house appliances, Bosch has a convenient solution to heating h2o without needing a lot of space. With the help of the Bosch Electric Tankless Water Heater, you'll be able to give your whole house stable, temperature-controlled h2o without having to rely on gas.

The Bosch Tronic 6000C comes with a simple, user-friendly interface and it's designed to replace a 40-gallon electrical tank-manner water heater. According to Bosch's Sizing Nautical chart, the WH27 model should be able to achieve a 3.v GPM with a temperature ascension of 45F.

The 6000C  WH27 was designed to direct replace the Bosch Tronic 5000C WH27. In addition, information technology will also replace 2 older models in Bosch'due south line-upwardly: The Bosch PowerStar AE125 and the Powerstream Pro RP27PT. The size and fittings are slightly dissimilar for the ii older models, so some modifications may be necessary.

Key Features

• Built to last with two solid copper heat exchangers and contumely fittings.
• The thermal cutting-out switch is not but an splendid safety feature, but it'll as well protect the heating elements from the damages caused by dry-firing.
• The sleek and compact design not only looks skilful, just information technology also can fit nearly anywhere.
• The congenital-in menstruum sensor and polymer encased elements ensures a constant  output temperature.

Pros

• ​Temperature range: 95 to 131F
• Sleek, modern, compact design
• Ideal size to install in tight spaces

Cons

• A college activation flow (.eight GPM) than nearly units
• Size and fittings are slightly different from other older Bosch models

Bottom Line

The Bosch Tronic 6000C WH27 falls into the mid-cost range for electric tankless water heaters. It's definitely a overnice option if you lot don't want to splurge for the higher-terminate units.

Bosch is a reputable company and at that place'southward a lot to like about this unit across information technology's sleek good looks and solid workmanship. According to their website, you tin can look to see 3.5 GPM at a 45 degree temperature rise. This is a respectable functioning for an electric tankless water heater and should be able to service 1 to 3 major appliances.

Stiebel Eltron Tempra Plus 24

The Stiebel Eltron Tempra Plus is a heavy-hit tankless water heater that can be used for both residential and commercial properties.

At that place's niggling doubt that Stiebel Eltron makes outstanding tankless water heaters. With German engineering and easily-on experience since 1924, you can rest easy that you're buying the best of the best.

The grey Tempra and Tempra Plus series is undergoing a cosmetic refresh. The "one-time" gray and "new" white models have the same dimensions, requirements and interiors. Yet, the "new" white models come with a shiny new housing, and an improved display and thermostat interface which includes:

• Preset temperature memory buttons
• Free energy monitor showing cost savings
• Menstruation rate meter

Beyond the cosmetic changes and brandish and thermostat improvements, they're basically the same unit of measurement. According to Stiebel Eltron'south Sizing Nautical chart, the Tempra Plus should be able to attain 3.1 GPM when the incoming h2o is 52F.

Stiebel Eltron explains their Avant-garde Flow Control feature similar this: "If the demand asked of a Tempra® Plus is greater than the unit of measurement can handle, Advanced Menstruum Control works by slightly reducing the catamenia of water. Instead of delivering colder water than the fix point, a Tempra® Plus automatically delivers slightly less water, but at the right temperature."

Key Features

• The digital display on the unit of measurement shows the desired set temperature, and the bar below displays the power capacity status. This bar has 10 segments, each representing x%. When the unit is operating and 5 confined are displayed, the Tempra Plus is operating at 50% capacity!
• Although the Tempra Plus has a temperature range between 68 and 140 degrees Fahrenheit, you'll accept the power to limit the maximum temperature to 109F to prevent scalding. This can exist particularly helpful if you have small children.
• The Tempra Plus uses Self-Modulation Free energy engineering science to ensure the unit uses the least amount of energy possible when heating the h2o. Sensors are used to monitor the temperature of the incoming and approachable water, and mensurate the flow charge per unit equally the water passes thru the heater. The micorprocessor processes the data and adjusts the heating elements as needed to deliver hot h2o efficiently using the to the lowest degree amount of energy possible.
• The Advanced Menses Command characteristic is i of the key things that makes the Tempra Plus such a quality product. Simply set the output temperature and the Tempra'southward microprocessor delivers a steady temperature output by adjusting the flow.

Pros

• Quality workmanship. Made in Federal republic of germany
• Advanced Catamenia Control allows the unit to continue a constant output temprature during high demand periods
• Without mechanical switches, the tankless is virtually silent

Cons

• College priced than many other electrical water heaters
• Slightly lower GPM than other electrical tankless units

Lesser Line

Information technology'due south hard to discover many short comings on the Tempra Plus 24. Once installed, it'll operate quiet as a ghost delivering hot water at a consistent temperature.

The award winning Advance Flow Control feature is unique to Stiebel Eltron, and information technology enables their units to evangelize hot h2o by adjusting the menstruum.

Similar all tankless water heaters, it'll demand regular maintenance to keep it running in summit condition, simply with the proper intendance, the Tempra could easily terminal over xx years!

According to their literature, you can expect 3.i GPM if the ground water temperature is 52 degrees. This should be able to service two showers at the same fourth dimension. This is slightly lower than the other units on our list, but the Advanced Flow Control helps this tankless operate extremely efficiently, and the quality workmanship and technology volition keep information technology running for decades!

Read our full review HERE.

EcoSmart ECO 27

The EcoSmart ECO 27 is one of the largest tankless water heaters manufacturered by EcoSmart, however, if you need more hot water, you should have a await at the more powerful ECO 36. But don't be fooled, the ECO 27 is capable of delivering hot water to a unmarried family home . . . fifty-fifty in colder climates!

EcoSmart designs their water heaters to be sold at a cost point that can run across most budgets, and this is a well-made, very popular unit, with enough of 5-star reviews to support it's entreatment.

According to EcoSmart'south Sizing Chart, the ECO 27 is capable of delivering 3.48 GPM of hot water when the incoming water temperature is 52F.

Key Features

• The cocky-modulating applied science allows the unit to adjust the amount of free energy used to the corporeality of hot water needed. This feature helps the ECO 27 run across your hot water needs in the well-nigh energy efficient way possible.
• The free energy efficiency of the ECO 27 is impressive. It can accomplish 99.8% efficiency!
• Equipped with thermal auto protection, you can rest assured that your h2o heater won't overload or overheat.
• The digital interface is intuitive and capable of delivering i-degree temperature adjustments.

Pros

• Temperature can be adapted in i° increments
• Temperature range: 80 to 140°F
• Copper and stainless components

Cons

• Must b professionally installed inside 30 days of purchase to be eligible for the express lifetime warranty
• Not every bit visually highly-seasoned equally the other tankless units

Lesser Line

The EcoSmart ECO 27 has go a popular electric tankless water heater pick. The manufacturer delivers a quality product at a reasonable price. It doesn't have the stunning skilful looks as the Stiebel Eltron or Bosch units, but information technology's a hard worker and well liked among habitation owners.

We dear that information technology has a Limited Lifetime Warranty, however, read it carefully, in that location are a number of fine print items.

EcoSmart states that this unit should be able to accomplish a 3.48 GPM if the incoming h2o temperature is 52 degrees. This flow rate should exist able to easily service 2 shower heads. Making this a powerful h2o heater for the price.

Read our total review Here.

Rheem RTEX-27

Rheem is a leader in the industry, and the RTEX-27 doesn't disappoint.  With the user-friendly blueprint and minimalistic advent, this whole house electrical tankless water heater delivers a powerful stream of hot h2o while maintaining an impressive energy efficiency of 99.eight%.

Designed to provide years of service, there are plenty of internal features, which makes this 1 of the well-nigh comprehensive, self-modulating units on the market.

Rheem offers a handy sizing tool to assist you find the correct unit for your geographic surface area and household needs. Merely a quick look at their Sizing Chart shows that you can await this unit of measurement to deliver 4.0 GPM at a 46F temperature rise, making this i of the near powerful electrical tankless water heaters around!

Key Features

• At peak performance, the Rheem RTEX-27 can deliver 6.6 GPM! Enough hot water to service 4 showers and 1 faucet.
• Electronic temperature control with easy to read display. The temperature can be adapted in ane degree increments.
• Advanced self-modulation allows the unit of measurement to run across the hot h2o demand by adjusting the corporeality of energy used.
• 3 Durable Copper Immersion heating elements with brass tops rut the water. They're not only long lasting, simply also field serviceable when replacement is necessary.
• The RTEX-27 tin can be wired for 208v instead of 240v. However, there is a 25% functioning downgrade.

Pros

• 3 Copper Immersion heating elements that can be serviced in the field
• Extremely powerful and in optimal atmospheric condition can deliver a maximum GPM of vi.6
• Temperature range: 80 to 140°F

Cons

• On the higher side of the price range
• Professional installation is recommended (just that's true with all tankless water heaters)

Bottom Line

The Rheem RTEX-27 tankless is a high quality electric tankless water heater. There'southward a lot to like about this unit, including it's commanding expert looks, powerful water heating, and good applied science.

Purchasing a tankless unit of this quality, from a reputable company is generally going to be on the higher side of the price range, and that's ture with this unit. But in that location'southward peace of mind in knowing that Rheem is often the "become-to" make that plumbers recommend.

With the proper intendance, this unit should last many years. If you're  looking for an electric tankless to stand up the examination of fourth dimension, the Rheem RTEX-27 should definitely be on your curt list.

Rheem states that the RTEX-27 has a maximum GPM of 6.vi, but keep in mind that almost areas won't exist able to achieve those numbers. Nevertheless, this is an extremely powerful unit and at a 46F temperature rise, the heater should exist able to achieve a 4.0 GPM.

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Which Electric Tankless Water Heater is Best for You

All of the electric tankless water heaters on the list are quality products from reputable manufacturers. Which 1 you select depends largely on your household hot h2o needs and budget.

If money isn't an issue, you may want to consider the Rheem RTEX-27 or Stiebel Eltron Tempra Plus. Both are impressive and amongst the best on the market. The Rheem RTEX-27 packs a lot of water heating ability into it'southward sleek looking unit, and we peculiarly like the Advanced Temperature Control features the Stiebel Eltron offers.

If you're looking for a fashionable unit to fit into minor spaces, the Bosch Tronic 6000C WH27 gets our vote. Less expensive than some, this unit will not only go the task washed, but you can constrict it away into the smallest of corners.

The ECO 27 stands up well to the higher priced units, and the manufacturer backs it up with a limited lifetime warranty. Not to mention, the unit is easy to utilise and well liked amid homeowners. This tankless definitely gets our vote for best bang for the dollar!

Whichever tankless water heater you choose, nosotros recommend installing a sediment filter on the incoming water line to protect the unit of measurement, and flushing it regularly to keep information technology running in optimal condition. With the proper care, your new tankless should last over 20 years!

Why Choose an Electric Tankless Water Heater?

Electrical tankless water heaters accept many advantages. Permit's have a look at how they compare to traditional tank-style h2o heaters.

What'southward the Difference Between a Tankless and Tank-Way Water Heater?

Without the demand for a tank, the departure between a tankless and a tank-style water heater may seem obvious. But at that place is far more than that separate them than the lack of a tank. Let's accept a await at a few of the major differences:

Endless Stream of Hot Water - When sized correctly, you'll never run out of hot water with a tankless heater. A conventional water heater is express by the tank size, and in one case fatigued down the unit will need time to heat more hot water.

Space Savings - Since a tankless h2o heater is mounted on the wall, their compact pattern requires far less space than a conventional heater.

Free energy Savings - Conventional tank-style h2o heaters are always operating. They are either heating h2o or keeping the h2o within the tank hot, which is called Standby Estrus Loss

A tankless unit runs much more than free energy efficienctly because information technology only turns on when at that place'due south a demand for hot h2o. Since water isn't sitting in a tank, you'll always know that your hot h2o is fresh and clean.

Costs - Although the initial purchase and installation costs may be higher for a tankless h2o heater, information technology'southward easily starting time by the monthly utility savings over the adjacent couple of years due in part to the lack of Standby Estrus Loss.

Replaceable Parts - A conventional tank-style water heater has a service life expectancy of 8 to 12 years. If the internal tank begins to leak, your simply option is to purchase a new water heater.

A tankless unit is designed to last up to 20 years and the bulk of the internal parts can be serviced or replaced.

Peace of Heed - When a conventional water heater'due south tank fails, you're looking at xxx-80 gallons of rusty, hot water on your floor! Considering 7 out of 10 tanks either outburst or leak, the odds aren't in your favor.

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How Does an Electrical Tankless Water Heater Oestrus Water?

The incoming common cold water is heated as it passes thru several electric heating elements. When a hot water faucet in your kitchen is opened, common cold water begins to menstruum into the tankless heater.

The 2nd the unit of measurement detects the incoming h2o, the electric heating elements burn-up to heat the cool water. Once the incoming water stops, the heating elements shut-down and the tankless has completed it'south task.

Tankless heaters are oft called on-demand water heaters because they just operate when there's a need for hot water. Electrical tankless water heaters operate entirely differently than a gas tankless unit of measurement, and in addition, they are far more than free energy efficient and easier to maintain.

How to Buy the Best Electrical Tankless Water Heater for You

Buying a tankless water heater is a large decision and it'due south critical that you lot take the time to find a unit that can deliver enough hot h2o for your habitation. Just browse thru some of the tankless reviews and you'll find enough of individuals who are disappointed that their unit wasn't able to continue up with the hot water demand.

With a niggling research and an agreement of how electric tankless water heaters operate and how to find the right 1 for your needs, you should definitely find yourself on the "satisfied customer" list. We recommend reading a couple of our articles; Tankless Water Heater Buyers Guide and Gas vs Electrical to aid you get started.

It should be noted that buying a tankless h2o heater does not hateful you'll have instanteous hot water. The water volition notwithstanding need to travel from the heater, through the pipes, and to the faucet or shower head. The farther the faucet is from the water heater, the longer you'll need to expect for hot water . . . just like with a tank-style h2o heater. Consider purchasing a betoken-of-employ water heater at the source (such every bit in a bath) for instanteous hot water.

How to Select a Tankless Water Heater

Electrical Tankless H2o Heater Buyers Guide

Selecting the correct sized tankless h2o heater is critical. If you purchase a unit that'southward too small for your needs, y'all'll exist disappointed and frequently find yourself using common cold or lukewarm h2o. If you purchase a unit that is besides large, yous're spending unnecessary money and may take completed unneeded electrical upgrades to your home.

Selecting the Right Sized Tankless Water Heater

Determining which tankless is the correct size for your habitation is chosen sizing. To properly size your tankless, you'll need to determine the necessary flow rate needed to fairly service your domicile.

You'll also need to know the incoming water temperature then you tin decide the temperature rise (or how hard the unit will need to work) to ensure that the tankless will be able to deliver the necessary menstruum rate.

Don't worry, information technology'due south actually non every bit difficult every bit information technology sounds.

All tankless manufacturers provide sizing charts, which is simply a way to communicate how much hot water, measured in gallons per minute (GPM) the heater tin deliver under ideal conditions. Once y'all know your required catamenia rate and the necessary temperature ascent, you lot tin can match these numbers to the manufacturer'south sizing chart to find the model that best meets your needs.

How to Determine Your Menses Rate

Menstruum rate is measured in gallons per minute (GPM), and it'southward the amount of h2o the tankless is able to heat at any given time. Every bit an example, if a tankless has a flow rate of 3.5 GPM, you can expect the unit to deliver 3.5 gallons of hot water every infinitesimal.

To decide your household'southward required flow rate you'll need to know how many hot h2o fixtures are used at the same fourth dimension during peak usage. Add each water fixture's GPM to calculate the total GPM needed.

Every bit an case, if your household takes ii showers at the same time, and each shower head uses two.2 GPM, your peak hot water need is 4.4 GPM (ii.2 +2.two = four.iv). Read our extensive article on How to Buy a Tankless Water heater for more details.

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How to Determine Your Temperature Rise

Temperature Rise is the difference between the heated output temperature and the incoming basis water temperature. If the incoming water temperature is 52F and your desired hot h2o temperature is 100F, the temperature rise will be 48F (100 - 52 = 48).

The GPM the unit can deliver is affected by the incoming h2o temperature. As an example, the incoming water temperature in Florida (67F) is much warmer than that of Nevada (47F). This means, that the same exact tankless h2o heater won't exist able to deliver the aforementioned GPM in both locations. The heater in Nevada will need to work much harder to oestrus the water (temperature rise), and therefore volition deliver a lower GPM.

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