Stiebel Tankless Water Heater Review

In an industry that’s full of models and units of all sizes and shapes, it’s essential to look for the highest quality to avoid any water-related troubles in the future. That’s exactly what the Stiebel Eltron 12 Plus Tempra tankless water heater is about. The price is steep, that’s for sure, but for the features, you’re getting and the peace of mind this appliance guarantees, we can assure you that it’s worth every penny. Don’t believe us? Check our review!


Design and Construction

The Stiebel Eltron 12 Plus Tempra is a tankless water heater, and as with most devices in this product category, it’s compact. After all, that’s the whole point of going tankless, isn’t it? Thanks to its small size (measuring only 16 5/8″ x 14 1/2″ x 4 5/8″), the 12 Plus Tempra can be mounted and installed virtually anywhere; on your wall, under the sink, in the closet, etc. The fact that the design is sleek and modern means that the unit won’t affect the overall décor of your apartment, condo, or office, thus adding to the convenience.

Even though this heater is built to be used separately to heat cold water (duh!), it can be used along with a solar heating system to preheat water to up to 131 degrees Fahrenheit.


The components of the heater are well-protected thanks to the sturdy steel coating, which means that you don’t need to worry about durability. This device is built to last, regardless of whether you’re going to use it residentially or commercially. Keep in mind that although the unit can be installed outside, you must shelter it to protect it from weather elements, especially rain and snow.

If you don’t want your warranty to go null, make sure to seek the help of a certified technician who can take care of the installation the right way. On the other hand, if you’d rather do everything yourself, just follow the instructions provided by the manufacturer, and everything should go smoothly.


Stiebel Eltron’s 12 Plus Tempra tankless water heater reflects the genius of German engineering. The manufacturer has been in the industry for nearly a century, which says a lot about the quality you can expect.

The 12 Plus Tempra tankless water heater packs solid copper heating chambers capable of getting your water to any temperature you seek every time you need it. Thanks to the Advanced Flow Control used in this unit, you can rest assured when taking your morning shower as the water will remain at the same heat level for as long as you want it to. That’s one helluva way to start your day right!

Despite its effectiveness, the Stiebel Eltron 12 Plus Tempra can save a helluva lot of money, in the long run, thanks to its energy saving capabilities. The energy efficiency of this appliance is second to none, which adds another significant advantage to the pile. The mechanism is rather simple, as the more heat you need, the more components the unit will use, but the result is fantastic.


Each unit comes with a 7-year warranty on leakage and a 3-year warranty on parts, which is basically the standard for this kind of appliance, so no WOWs here.


Compared to other tankless water heaters, the Stiebel Eltron 12 Plus Tempra is expensive. It’s easy to see why the unit has a higher price tag though. Quality components, energy efficiency solid construction, and effective, adjustable water heating capabilities, what else could you possibly ask for in a tankless water heater? This is the kind of appliance that you can keep using for years on end without worrying about anything. Mr. Total peace of mind much?

Verdict on the Stiebel Eltron 12 Plus Tempra

Tankless units are taking the water heating industry by storm, and if you don’t want to miss the boat, it’s critical to search for the best product in this category. If you understand that quality comes at a price, which you’re willing to pay, the Stiebel Eltron 12 Plus Tempra tankless water heater is the way to go, period.


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