Stiebel Eltron Tempra 24 Plus Tankless Water Heater Review is reader-supported. As an Amazon affiliate, we earn from qualifying purchases.Learn more

Stiebel Eltron is a name that is known worldwide for its excellent central heating and energy products.

Founded in 1924 in Berlin, Germany, it has established itself as a leader in heating products in numerous other countries today.

Not only has the company adapted green energy technology, but it has started to promote and encourage others to embrace it as well.

Stiebel Eltron Tempra 24 plus is a moderate flow rate electric tankless water heater with an advanced flow control technology.

It is capable of saving 15 – 20% energy or more compared to an electric storage-tank water heater. This water heater comes with several features that make it extremely user-friendly.

Key Specifications of Stiebel Eltron Tempra 24 Plus

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White The Stiebel Eltron Tempra 24 plus is an electric tankless water heater that is capable of providing a maximum output flow rate of 5 GPM in the warmer, southern regions of the US.

In places where the average groundwater temperature is 42˚F the maximum flow rate is 2.6 GPM. For 52˚F it is 3.1 GPM, for 62˚F it is 3.8 GPM, and for 72˚F it is 5 GPM.

It is capable of saving a significant amount of energy with its auto modulation feature. The advanced flow control technology helps in keeping the water temperature consistent even during high demand.

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White

It has a digital temperature display with two temperature memory keys. It also has an economy monitor that displays how much energy is being saved with its use. The heater also has a childproofing setting.

The other key specifications are listed below.

Dimensions 369 mm H × 420 mm W × 117 mm D
Weight 16 pounds
Temperature range 68˚F to 140˚F
Rated voltage 1 208 V
Rated output 1 18 kW
Rated current 1 2 x 44 A
Fuse 1 2 x 50 A
Rated voltage 2 240 V
Rated output 2 24 kW
Rated current 2 2 x 50 A
Fuse 2 2 x 50 A
Frequency 50/60 Hz
Power 2/GRD
Activation flow rate 0.5 GPM
Energy factor 0.99

Ease of Installation 

The compact design of this unit makes it easy to install. Using electricity to heat water makes the unit free of any venting requirements.

These two factors make this product significantly easier to install than a lot of other tankless water heaters.

Ensure that the installation manual is thoroughly read before proceeding with the actual process. The clearances provided in the manual must be maintained during mounting.

Also, make sure that the electrical connections are carefully done as given in the installation guide.

The unit is small and light and the installation is quite straight-forward. It can be done by a homeowner who has basic electrical and plumbing skills.


Stiebel Eltron Inc. provides a limits warranty service to its customers for a period of 7 years for the heater itself, and 3 years for the heater parts.

Labor and other charges are not covered in the warranty and must be paid for by the users themselves.

Any damages caused to the heater due to reasons that are not directly influenced by any manufacturing defects will not be covered under warranty. Read the limitations thoroughly before purchasing the product.

To avail warranty, call Stiebel Eltron at +4955317020 or visit their website

Consumer Review Analysis

Stiebel Eltron 24 Plus Tempra, Tankless Water Heater, White

The most received positive response from the customers of Stiebel Eltron Tempra 24 Plus is its ability to supply hot water to multiple applications without a decrease in the temperature.

It has been capable of running up to 3 showers simultaneously according to the users.

Users have also commended the easy installation procedure for this product. With a little knowledge of running water lines and electric lines, it is a quick and simple installation task.

The energy savings that come with the use of this product is another major factor that has to be considered. Many users have reported significant savings in heating bills after using this heater.

The performance of the heater also did not show any signs of decline.

Although this product has received mostly favorable reviews, some customers have complained that the product failed in less than 2 years from the date of purchase.

However, customers who have done regular maintenance have claimed that the product works fine for longer periods.

There have been mixed reviews from the users regarding Stiebel Eltron’s customer service.

Some customers are greatly satisfied with the support they received from the manufacturer whereas, others claim that the service is quite poor.




  • The installation procedure is hassle-free and explained in detail in the instruction manual.
  • The device is made of heavy-duty materials that make it extremely durable. It lasts for a long time if installed properly.
  • It is capable of providing an unlimited hot water supply with a constant output temperature.
  • This heater helps in saving energy and money on electricity bills.


  • Some houses might require an upgrade of the electrical configuration which can be quite expensive. It cannot be used in houses with less than 60 A circuits.
  • It does not work very well in colder climates and may not capable of supplying water to multiple applications.



Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
826 Reviews
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
  • CONTINUOUS FLOW – Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
  • SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
  • EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work

Recommended Accessories

Service Valve Kit is necessary when the heater is being cleaned or drained. It is shut off all the water supply to and from the water heater before doing any maintenance tasks. Watts LFTWH-FT-HCN Service Valve Kit for Tankless Water Heater


Water conditioner is necessary for softening water so that any damage to the heater due to excessive scaling can be prevented. Stiebel Eltron 692442 Model Scale TAC-ler Water Conditioner Fits with All Tankless and Conventional Tank-style Water Heaters, Maintains Water Pressure and Flow Rates, Built-in Sediment Pre-filter



What is the Warranty for Tempra 24 Plus?

The warranty for leakage in the heater is 7 years and 3 years for the damages in other parts. However, if the user is responsible for the damages, the warranty will become void.

How many Gallons per Minute can be Provided by this Heater?

The output flow rate is dependent on certain factors, primarily on the climate of the regions. The maximum output flow rate is 5.5 GPM in the warmer southern states of the US.

Can the Installation be done by the Owner?

With the right knowledge in electrical and plumbing, the installation can be done by the users themselves. Read the instruction manual carefully and ensure that the appropriate parts and tools are being used in the procedure.

Can this be used for an in-Floor Heating System?

Customers have used this heater for in-floor heating. The manufacturer recommends that you contact a company called Hydro Shark for this purpose through its website

Our Recommendation

The Tempra 24 plus from Stiebel Eltron is a high-performance unit that operates consistently to provide continuous hot water to its user.

Its advanced flow control technology ensures that the temperate of the water remains consistent even when multiple applications are being used.

It is not something that one would call a cheap option for a unit of such a small size.

However, its performance completely makes up for its price. With proper sizing, installation, and maintenance this product could be the perfect water heater for your house.


Last update on 2022-12-01 / Affiliate links / Images from Amazon Product Advertising API

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