Stiebel Eltron Tempra 24 Plus Tankless Water Heater Review

In Brief: Review of Stiebel Eltron Tempra 24 Plus

The Stiebel Eltron Tempra 24 Plus is an indoor tankless water heater that can supply endless hot water with minimal wait time. The tankless design not only saves space but also has minimal energy consumption. This heater comes in a sleek and compact body that can be installed in unconventional spots like cabinets and attics. Priced at a moderately expensive cost, this system makes for a good buy.

Established way back in 1924, Stiebel Eltron is known for manufacturing products at the highest technological level.

Headquartered in Holzminden, Germany, the company is known for specializing in home comforts and renewable technology.

The Stiebel Eltron Tempra 24 Plus is an energy-efficient tankless water heater. It runs entirely on electricity and is known to be much easier in installing than heaters that run on volatile gases.

Key Specifications of Stiebel Eltron Tempra 24 Plus

Stiebel Eltron 224199 240V, 1 Phase, 50/60 Hz, 24 kW Tempra 24 Plus Whole House Tankless Electric Water Heater, Advanced Flow Control

The Stiebel Eltron Tempra 24 Plus is a top-rated electric water heater with a tankless design. It comes in a sleek and compact body that saves space. This heater does not require any venting.

This model features the patented Advanced Flow Control™. This automatically reduces the water flow if the temperature demand is greater than what the system can handle.

The self-modulating technology ensures that the least amount of energy is consumed to heat the water.

All Tempra products have microprocessor technology and several temperatures and flow sensors. These keep the water flow steady.

It can supply endless hot water in up to three showerheads simultaneously. It has a temperature range of 68-140°F.

To learn more about the Stiebel Eltron Tempra 24 Plus, watch these videos:


Major specifications of the Stiebel Eltron Tempra 24 Plus:

Voltage208 V
PhaseSingle or unbalanced 3-phase
Fuel typeElectric
Activation1.9 GPM
Amps2 x 44
Circuit breakers2 x 50
Wire size6 AWG
Temperature @ 1.5 GPM82 deg F
Temperature @ 2.25 GPM54 deg F
Temperature @ 3 GPM41 def F
Temperature @ 4.5 GPM27 deg F
Minimum operating pressure30 psi
Maximum operating pressure150 psi
Minimum temperature68 deg F
Maximum temperature140 deg F
Weight16.1 lbs
Dimensions16-5/8"H x 14-1/2"W x 4-5/8"D
Connection size3/4" NPT
Certifications and listingsCSA Listed, ETL Listed, UL Certified

Ease of Assembly and Installation

The Stiebel Eltron Tempra 24 Plus is quite easy to install. The owner’s manual has all the important information relevant to operation and installation. This heater can be installed without having to hire a professional.

The installation process can be split up into five subtopics. These are installation configuration, mounting, water connections, electrical connections, and commissioning the heater.

The manual also has details about safety, care, maintenance, troubleshooting, spare parts, and the warranty.

Here is an installation video to guide you further:


Ease of Usage

The Stiebel Eltron Tempra 24 Plus has a very simple user experience. However, understanding how to use the buttons and what the display means will take a little bit of effort in reading.

The first 9 pages of the installation manual describe the operation. There are labeled diagrams that help you identify the user interface components correctly. There are two separate diagrams for the system unit and the system display.

Warranty / Repairs

The Stiebel Eltron Tempra 24 Plus comes with a limited 7-year warranty. There is a 3-year warranty on parts and labor. This warranty is only limited to the original purchaser.

You can find more information about what is and isn’t included in the warranty on page 22 of the owner’s manual. After purchasing, you must register your product. Details on this procedure are also mentioned in the manual.

Customer Review Analysis

We did a thorough analysis of different e-commerce websites and online forums to check what customers think of the Stiebel Eltron Tempra 24 Plus.

Buyers seem very pleased with their purchase and have given an average rating of 4.4 stars. Out of 660 reviews, 90% have given ratings upwards of three stars.

Users are happy with the temperature control and the steady flow of water. Even when using three showers together, the hot water doesn’t run out. At the same time, users save up on utility bills.

Reviewers have also mentioned that it is relatively easy to install. The installation manual is quite detailed and written in simple language. The lack of venting saves time and effort.

There are hardly any negative comments about this heater online as customers are quite happy with it.

The only problem is that this heater requires quite a lot of power for operation. So, if your home has less than 60A breakers, it might not be compatible.


Pros/Cons of Stiebel Eltron Tempra 24 Plus

Through our research of consumer reports and expert comments, we concluded with the following pros and cons of the Stiebel Eltron Tempra 24 Plus:


  • Tankless design
  • Energy efficient
  • Durable
  • Easy to install
  • Steady water flow
  • Sleek design


  • Replacing circuit breakers to compatible ones may be expensive


Recommended Accessories with Stiebel Eltron Tempra 24 Plus

Customers who bought the Stiebel Eltron Tempra 24 Plus were also interested in buying:

IPS Isolator Tankless Heater Service Valve Kit 

Kozyvacu 3/4-Inch IPS Isolator Tankless Water Heater Service Valve Kit with Clean Brass Construction (FNPTxFNPT)


LASCO 05-1713 Pressure Relief Valve

LASCO 05-1713 150 PSI Pressure Relief Valve with 3/4-Inch Pipe Thread


Eastman 48252 Water Heater Connector

Eastman 48252 Flexible Stainless Steel Water Heater Connector 3/4' FIP Swivel, 24' Length, Silver



Can this heater work on a mobile home with a 200 amp main?

Yes, it can. This heater needs 2, double pole 50 amp breakers and typically fits into a 200 amp easily.

Can you connect water lines in the same place as a washing machine?

As long as the heater has a supply line going to it, you can connect the water lines wherever you need hot water.

Can this system be used for floor heating?

It is not ideal for it but customers do use it for floor heating.

Can this heater be installed outside?

It is not recommended. However, if you must, then protect it with weatherproof casing.

Does this need some kind of pressure valve?

No, not unless the pressure exceeds 300 psi.

Our Recommendation

The Stiebel Eltron Tempra 24 Plus is ideal for residential and commercial spaces with moderate water usage. It can provide endless hot water to up to three showerheads simultaneously.

This tankless heater comes at a mid-range price and is a good investment because of its energy efficiency. The relative ease of installation gets it ready for use without much hassle.

Last update on 2021-09-22 / Affiliate links / Images from Amazon Product Advertising API

Steven Johnson
About Steven Johnson

Steven is a young science graduate who loves to research and write on topics related to water. He contributes articles when he gets free time from his day job.

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