Best Electric Tankless Water Heater 2019: Top Reviews

Why choose electricity over gas water heater?

Well, a Best electric Tankless water heater is such a voluble topic, I hate to define in such a short span of Electric Tankless water heater review. Anything to be best has to accommodate all the best features, albeit we the consumers mostly forget to compensate each element with the additional price. So in our sense best electric water heater is that which is better than most Electric Tankless water heater and has a reasonable price ensuring the excellent value of money.

Stiebel Eltron Tempra 29 Plus Electric Tankless Whole House Water Heater

Stiebel Eltron Tempra 29 plus electric tankless Whole House Water Heater is an upper-end version of Tempra series. This series claims on saving 15-20% cost of the water bill.

The most important feature of this series is a smart microprocessor technology it can calculate exactly how much electricity is required to maintain the desired level of temperature, based on that it takes that much electricity and saves the rest. Also, it can adjust the temperature based on the flow rate so no chance of fluctuating heat for dithering flow rate. It has a convenient digital display that let you control the temperature at any level from 86 to125f (30 and 52c).

Stiebel EltronTempra 29

It is workable in both 208/240 voltage specification giving you prolific options. It needs 150 psi working pressure to activate. For safety, you need three units of 50 amp circuit breaker. Required wire size is 3 x 8. It weights comparatively more than most electric heaters that are 17 pounds yet less than a toddler’s weight. Dimensions are- 21.8 x 19.2 x 9 inches. It has a 3-year limited warranty.

When reading Electric tankless water heater reviews, you must have come across the name Stiebel Eltron for 90 years in this industry they now proudly claims they make Best electric water heater. As a forerunner of the manufacturer of Best electric water heaters, they give you an option to set the highest temperature at 109 degrees C, So that risk of scalding evaporates and your chances of liking it radiates.

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater is a 4.64 GPM powered self-modulating heating unit. Like other Tempra Plus models, Stiebel Eltron Tempra 24 Plus has advanced Flow Control technology that can persistently give steady output at a single temperature irrespective of flow rate and win your satisfaction as a Best electric water heater.

With almost 5 GPM capacity it can support two bathrooms in warmer climates and 1-2 bathroom in cold environment assuming 1.5 -2 GPM for regular shower heads. It has the digital display option like other Tempra series. As a pioneer for last 90 years Stiebel Eltron makes best electric tankless water heater keeping in mind good looks, safety issue, efficiency and cost-saving features.

Stiebel Eltron Tempra 24

SO if you want to save the analysis and reading other Electric tankless water heater review it is safe to choose any one option from this brand depending on your house size.

Rheem RTE 13 Electric Tankless Water Heater

Rheem RTE 13 Electric Tankless Water Heater is a moderate capacity tankless water heater with 4 GPM. Just enough to have a full forced shower at any temperature. $ GPM is good enough for the warmer climate to have a shower and use a wash basin at a time (2 GPM+1.5 GPM). However, in temperature of 35 degrees, it can support a single shower application. SO if you live in a studio apartment or a small house with one bathroom this is just enough.

It needs a marginal flow rate of 0.4 GPM to activate so those with low water pressure you have found a match. It takes 13 kW, requires 60-volt double pole breaker for functioning efficiently.

240 volt to maintain a constant output at the desired temperature, the electric tankless water heater offers modulating power control. It is super light with 7.3 pounds and with 7.2 x 7.2 x 7.2 inches size is also small enough to fit in anywhere.

Rheem RTE 13

This is one of the best tankless water heaters for a tiny house is small sized but energy efficient and has Energy Star certification. One thing that may turn you off Is one year limitation period of warranty for parts however parts are not that expensive as the burner Rheem gives a ten year warranty period on it copper-made heat exchanger. The reason to use copper heat exchanger is that Rheem wanted to provide a tankless unit which will heat up water fast still cost less.
This one of the best tankless water heaters for a tiny house can become impeccable If installed right with copper pipe to fit in the inlet and outlet lines.

Additional pressure and temperature release valve assure you of no more dripping. It has a digital scale for easy temperature adjustment, LED light to show if it is working and a standby mode to save you electricity bill. It is reported by users on a very first month of installing this you can enjoy a 25 dollar redemption on a bill (for a 100 sq ft home with two people).

Rheem RTE 9 Electric Tankless Water Heater

Another small-sized Electric Tankless Water Heater is Rheem RTE 9 Electric Tankless Water Heater with 3 GPM maximum water flow. This is good for a point of use need and a single application at a time. One thing that I found most attractive is how low electricity it consumes, only 9 volts at the 240-volt line. So required breaker size is only 40 amp single unit. It has a Minimum Activation Flow rate of 0.4GPM.It a copper heat exchanger which guarantees water will get faster and efficiently keep the heating in the shower.

Those with a kid or without any kid generally need only a faucet or shower to be used at a time for them it is ideal. It also works excellent in condos, boats, small offices, and small laboratories.

Rheem RTE 9

It's a digital smart scale where you can change the temperature at the one-degree interval. A LED indicates on-off mode. Also, a standby mode is extant for cost-conscious people.

With 7.2 x 7.2 x 10 inches size and 8-pound weight, it is not only small and light also efficient in getting inside a small cabinet in case you are a person who does not like flaunting gadget. Energy Star, certification confirms it is eco-friendly as well as cost redeeming for home usage.

It has parts warranty for one year and Heat exchange warranty of 10 years. But remember if you have installed it on your own which is very likely as it is easy to install and very light to handle than you will be revoking the warranty clause Only professional installation will entitle for availing warranty.

If you reside at a place with the different temperature that radically varies time to time and looking for the Best Tankless water heater for the tiny house, you would be happy to know the with this you get 3 GPM 20 deg F; 2.05 GPM at 30; 1.54 GPM at 40. So if your wiring and electric set up go with it, it is a natural choice for a small home.

Stiebel Eltron DHC 3-1 Electric Tankless Water Heater

Are you that kind of person who can never miss the clock tickling sound at night! Therefore moves to the Swiss watches where tick sound never bothers you a middle of the night keeping you awake while all others are asleep? Then there is a chance that you hate water heaters for their noise. Not all heaters make the sound, some are very smooth, and the music is minimal still Electric motor noise that generates from bearings, rotor, and stator especially, the fan of the vent, can be are hard to avoid. If you are looking for a solution than Stiebel Eltron DHC 3-1 Electric Tankless Water Heater is the one. It has Hydraulic control for quiet operation.

Stiebel Eltron DHC 3-1 Electric

It has the Exclusive copper-clad heating element that makes water hot instantly and assures you will never run out of hot water. I have heard people being saturnine because some of the best tankless water heaters for tiny house won’t go with their electric configuration. They will be glad to know that Stiebel Eltron DHC 3-1 Electric Tankless Water Heater is available at 120 V, 208 V, 240 V, and 277 V.It has a controlling heat system which has a flow switch and exclusive scald-guard thermostat so that you can control the heat always. Also, there is a high limit setting that can be manually returned based on the temperature of your home.

It is a point of use heating system with low flow and significant savings. Along with the model DHC 3-1, DHC 3-2 and DHC 4-2 also have this feature of being accompanied with 0.5 GPM pressure compensating flow reducer; these will comfortably fit with most faucets. With the help of these aerators, your home faucets will save water and would get hot water instantly and for the longest time. So this is one of the best tankless water heater for a tiny house, cabin, Laundry Areas, Small Cabins, Kitchen Sinks but if you are residing in North and inlet temperature is too low then this may not be the best option.

How to Install a Tankless Electric Water Heater?

We will put shortly how a Tankless water heater works. In a tank water heater, there is a large tank which holds water in it & continuously heats up water to maintain a constant temperature so that you can use hot water when you need.

A Tankless water heater has no tank in it. So water goes through the pipe & when you need to use hot water you need to turn on the knob. Then the cold water flows through the sensor which leads the machine to the water heating process instantly. This heating process can be done with an electric element or gas burner. However, whatever it is, you will get instant & constant hot water flow by using this tankless machine.

Before installing a tankless electric water heater, you need to take all the necessary preparations like plumbing, checking electrical settings, etc. For your safety purpose, it’s recommended to get a professional electrician for verifying that your house electrical settings are adequate to install a Tankless water heater.

Manufacturer wise installation process may differ but below we will describe to you the general operation of installing a Tankless electric water heater.

Plz, follow this steps-

1. Turn off the valve of the main water supply line.

2. Detach the water pipeline from the old water heater tank. There can be a small amount of water inside the pipe. So before detaching pipe just put a jar at pipe detachment place to hold some spilled water.

3. Then disconnect the water heater electric plug from the socket which divides it from all kinds of electric source & disposes of it.

4. Now get the new Tankless water heater. Get all hardware close to you as per your manufacturer's instruction manual. Then select a place on the wall to mount up the water heater & be confirm that it maintains the safety law of your building.

5. Mount the water heater as per your manufacturer's instruction & be confirm that your wall has enough support to handle the weight of your new water heater.

6. Connect the supply water pipe to the water heater with recommended adjustment of a union connector sets which accommodates bypass capability in the water supply.

7. Please ensure that your heat source is close to your water heater. So make a place on the wall to set your electric socket to plug the wire into it.

8. Now you need to switch on your tankless electric water heater when you need to use hot water.


Good luck with buying the best electric Tankless water heater, remember to compare the relative features and how they add value to your home. Do not end up purchasing an over sized or undersized electric Tankless water heater or a heater that does not match with your house’s electrical requirements.

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