Stiebel Eltron Tankless Water Heater Reviews

Electric tankless water heaters have suffered a wave of distrust when they first came out. However, it didn’t take long before Steibel Eltron revolutionized the industry by creating an energy friendly water heater that feeds on electricity.

The reason we back the brand’s claim is because we ran several tests with the same using habits and we learned that Electric Tankless water heaters save up to 20% of energy compared to their tank water heaters counterparts.

With sophisticated technology features, an excellent energy efficiency range and a German origin, Steibel Eltron seems to have a strong claim but is it enough to make you switch? Let’s find out!

Stiebel Eltron Tankless Water Heater Reviews

Available Models

In a highly competitive market, Steibel Eltron had to invest heavily in variety in order to ensure the satisfaction of the different categories of users out there.

In that respect, we’d argue that the brand did a fantastic job since they were capable of building an impressive set of 6 electric instantaneous water heaters embodying the Tempra Series.

Steibel Eltron Tempra® 12

Stiebel Eltron Tempra 12 ReviewInitially, the Tempra® 12 seems like an under achiever at most and especially because it is an electric tankless water heater. However, you would be surprised to learn that this little beast is capable of hitting up to 2.5 gallons per minute (GPM) of hot water.

In that respect, your environment will have a toll on the performance of this unit and that means it can go all the way down to 1.3 GPM if you live in northern Canadian regions.

However, if you live somewhere between the north and south for the states then you can expect a reliable 1.5 to 1.9GPM which is plenty for a small household with a single shower.

In conclusion, the Tempra 12 is the most efficient in terms of energy and that can save you a lot of money in the long run.

Steibel Eltron Tempra® 15

Stiebel Eltron Tempra 15 ReviewSecond on the list is the Tempra® 15 which is a nifty little heater to say the least. Indeed, this compact tankless water heater is surprisingly powerful but equally efficient.

Accordingly, the technology behind Steibel Eltron tankless water heaters is considerably more advanced than most its competitors, which is why a water heater this small can heat up to 3.1 gallons per minute in hot regions.

Nonetheless, similar to the previous model, this Tempra is also bound to your local temperature fluctuations and performance can slide all the way down to 1.6 GPM in extreme cold regions.

In average, the Tempra 15 is extremely reliable as it bounces between 2 to 2.5 gallons per minute and that is sufficient for a small family with a single bathroom.

Steibel Eltron Tempra® 20

Stiebel Eltron Tempra 20 ReviewTaking one step further on the ladder will lead you to the Tempra 20 which is a more industrious unit with quite a kick. In fact, this compact heater is capable of pumping significant quantities of hot waters while being completely quiet just like the rest of its siblings.

Speaking of quantity, the Tempra 20 is a beast to say the least, considering that it can attain as much as 4 gallons per minute in southern states where the heat is approximately averaging 70°.

On the other hand, the heater can get significantly weaker in northern regions where temperature drops to 40° on average.

Thus, while the weakest performance is still above 2 gallons per minute, we were rather impressed that this heater is capable of maintaining up to 3 GPM in average temperatures and that makes it fully capable of fulfilling your needs for hot water whether you’re living in a flat or in a medium sized home.

Steibel Eltron Tempra® 24

Stiebel Eltron Tempra 24 ReviewThe Tempra 24 is where Steibel Eltron begins a serious race for outstanding GPM performance. Truly, you would hardly ever expect to see such a performance from an electric heater, let alone an electric tankless water heater that measures 4.6 x 16.6 x 14.5 inches.

In that context, the unit at hand is capable of pumping out as much as 5 gallons per minute of hot water in hot regions and that is plenty enough for medium to large families. However, once the temperature begin to hit an average of 55°, the heater will drop to around 3.5 GPM.

While it is important to keep in mind that this compact unit requires a 0.50 GPM flow to activate, it is more significant that it is capable of maintaining a continuous flow of 2.6 GPM even at the lowest temperature possible and that is plenty for a single shower and regular kitchen use.

Steibel Eltron Tempra® 29

Stiebel Eltron Tempra 29 ReviewIf you’re seeking more GPM then you’ve come to the right place because the Tempra at hand takes a significant leap in comparison to its younger siblings.

In fact, this water heater is still as compact as most units on this list, standing at 4.6 x 16.6 x 14.5 inches. However, it is capable of pumping a maximum of 6 gallons per minute and that is phenomenal.

While maintaining a low energy cost, the unit at hand will definitely overcome plenty of natural gas powered units out there, especially knowing that it will deliver around 4GPM on average in colder temperatures.

Even in the coolest Canadian regions, the Tempra 29 will still be capable of pushing out an impressive 3.1 GPM of unlimited hot water which is outstanding to say the least.

Steibel Eltron Tempra® 36

Stiebel Eltron Tempra 36 ReviewLast but definitely not least comes the boss under the name tag: Tempra 36. Steibel Eltron’s greatest Tempra seems to be a considerable upgrade since it is going to be more energy hungry but most importantly, it will pump out a staggering 7.5 gallons per minute at its peak.

The unit at hand is definitely an over kill for plenty of people out there even at its lowest performance. Hence, it is important to keep in mind that the most suitable heater for you is the one that provides just enough hot water and consumes as little energy as possible.

That being said, the Tempra 36 can pump out up to 5GPM in average temperature regions and as much as 4 gallons per minute in extremely cold regions, which is still plenty for a home with high-demand for hot water.

Design & Build Quality

In terms of design, the Tempra series will hardly ever be remembered on visual basis because Steibel Eltron decided to go for the simplest and most minimalistic approach.

Indeed, Tempra tankless water heaters do not stand out aesthetically and that is fairly common amongst electric water heaters. On the upside, any Tempra unit will blend in very nicely with white tile in your bathroom or kitchen and that is a nifty touch that you’ll learn to appreciate in time.

As for build quality, we can’t help but build a stereotypical mold for the Tempra lineup because it is made in Germany after all. Unsurprisingly, Steibel Eltron is a solid representation of German ethics and dedication, which is visible in various aspects.

Taking a peak under the hinged lid of these water heaters will make you feel like you can modify and fix this yourself if ever needed but that is highly inadvisable. Although the Tempra series harbors quite a simple setting, it is highly calculated and laid out perfectly.

Also, everything within the heater is made of highly resistant materials especially the cables that are going to be in constant friction with heat. When it isn’t plastic, Steibel Eltron relies heavily on copper for high resistance and durability.


In terms of features, there is definitely a lot to say about the Tempra Series but for the sake of clarity, we will stick to bullet points instead of paragraphs.

  • Self-Modulation Energy Technology that will reduce the amount of energy needed to heat water.
  • An unlimited and continuous supply of hot water no matter the unit.
  • Space saving design
  • Smart interface with an intuitive display of temperature & cost savings
  • Smooth temperature setting knob
  • Easy to install
  • Safety thermal cut-off
  • Flow & temperature sensors
  • 7 years leakage & 3 years parts warranty
  • Requires 240V for all units

Final Thoughts

In conclusion, Steibel Eltron water heaters have managed to make an impact with the impressive Tempra Series and that is a significant achievement in a highly competitive market.

Indeed, the brand has successfully delivered a wide variety of high performance electric water heaters and that means you will necessarily find the perfect one for you.

For more information, find a Step by Step guide to buying a tankless water heater right here.

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