Stiebel Eltron Tempra 24 Plus Review – Best Water Heater of 2023?

Stiebel Eltron Tempra 24 Plus

Are you in search of an impartial review of the Stiebel Eltron tempra 24 plus?

Here, I’ll guide you through various aspects of the Stiebel Eltron tempra 24 plus to help you make an informed purchasing decision.

If you’ve found your way to this post, it’s safe to assume that you’ve already done your research on the different types of tankless water heaters available in the market. You might have even made up your mind about the brand and model, and now you’re looking for that final piece of information to cement your decision. If this right as Im telling then you’re at a perfect place.

This review is entirely unbiased, so stick around, as we have plenty of insights and details to share with you. Rest assured, we’ll be focusing solely on the Stiebel Eltron tempra 24 plus electric tankless whole house water heater, 240 v, 24 kw, so you can relax and let us provide you with all the information you need.

Note: I also reviewed it big brother Stiebel Eltron Tempra 29 Plus!

Stiebel Eltron Tempra 24 Plus Review

Space Save Design

Stiebel Eltron Tempra 24 Plus

The Stiebel eltron tempra 24 plus boasts a space-saving, sleek white design that effortlessly combines form and function. This water heater is an ideal choice for homeowners seeking a compact yet powerful solution to provide a continuous supply of hot water throughout their entire house, and the best part is, no venting is required.

In terms of dimensions, this product measures 20.1 x 21.7 x 9.6 inches and tips the scales at a mere 16 pounds, making it one of the lightest water heaters on the market.

Beyond its lightweight construction, the tempra 24 plus stands out as one of the most technologically advanced models available. It offers users the flexibility to set the water temperature within a range from 86°f to 140°f, catering to various preferences and needs.

Although it may not win any beauty contests with its slightly blocky design, its appearance takes a back seat to its remarkable heating capabilities. This water heater is a true workhorse, ensuring that you have a constant and reliable supply of hot water without compromise. Its performance and efficiency overshadow any cosmetic concerns.

One standout feature of the stiebel eltron tempra 24 plus is that it doesn’t require an external vent. Unlike traditional gas-type water heaters that necessitate complex venting setups, this electric model eliminates the need for any exterior venting, simplifying the installation process and making it a hassle-free choice for homeowners.

 Power and Energy Efficiency

When it comes to picking a water heater, power and energy efficiency are really important, and the Stiebel Eltron tempra 24 plus shines in these areas.

I tested it thoroughly, and the results were quite impressive. I put it to the test by turning on a shower and two faucets to full power while keeping the water temperature at 115 degrees Fahrenheit. To our surprise, it delivered piping-hot water without a drop in water pressure. This is thanks to the heater’s strong 24kw power.

But what’s even more impressive is its energy efficiency. This tankkless heater boasts a remarkable energy efficiency rating of 99%. In plain terms, this means it has the potential to save you a lot of money on your energy bills in the long run. Compared to traditional water heaters with tanks, the Tempra Plus 24kW can reduce energy costs by up to 20%, making it a smart and eco-friendly choice.

There’s an important feature to note: the water heater requires a minimum water flow to kick in. This helps ensure efficient operation and keeps your costs down. If your water flow is less than half a gallon per minute, the heater won’t turn on, preventing unnecessary energy use.

Furthermore, the stiebel eltron tempra 24 plus electric tankless whole house water heater is different from regular water heaters because it doesn’t waste energy on standby heat loss.

Unlike traditional heaters that store hot water in a tank, this electric heater heats water only when you need it. This not only saves energy but also eliminates the frustrating wait for hot water.

As soon as you turn on the tap, you can expect hot water to flow in less than a minute, highlighting the Tempra 24 Plus’s exceptional performance and energy efficiency.

Water Flow

When you’re in the market for a tankless water heater, one key factor you should pay close attention to is how much hot water it can provide. This is where the flow rate comes into play, and it’s essential for making sure you have enough hot water when you need it. The stiebel eltron tempra 24 plus gallons per minute with Advanced Flow Control is an excellent choice that excels in this regard.

This water heater may be small, but it packs a punch when it comes to water flow. It delivers a steady 4.5 gallons of hot water per minute. This means you’ll always have plenty of hot water available, which is perfect for the average family.

In practical terms, it can handle multiple people using hot water at the same time without a hitch. During our testing, we even had three users using hot water simultaneously, and the system didn’t miss a beat.

To highlight its reliability, Stiebel Eltron Tempra 24 Plus went the extra mile and conducted extensive research to understand the water heater’s capabilities.

Their findings revealed that the Tempra 24 Plus model can handle a substantial load, capable of supporting up to 10 bathroom sinks running concurrently while maintaining a toasty water temperature of 105 degrees Fahrenheit. This underscores its ability to meet the demands of a busy household without causing any inconvenience or temperature fluctuations.

One standout feature of the Tempra Plus water heater is its Advanced Flow Control mechanism, setting it apart from typical models. This innovative technology ensures that even in situations where the system might be pushed to the limit, it keeps performing well.

Unlike other water heaters that might struggle and provide inadequately heated water, Stiebel Eltron Plus water heaters take a different approach. Instead of sacrificing water temperature, they automatically adjust the flow to maintain a consistent and comfortable level of hot water.

In my experience, this unique feature has proven to be incredibly valuable. It’s much better to have a slight reduction in water pressure during high-demand times than to be surprised by a cold shower due to a drop in water temperature. The Tempra Plus water heater, with its Advanced Flow Control, truly shows a commitment to user convenience and satisfaction, ensuring your hot water needs are consistently met without compromise.

Digital Temperature Control

Stiebel Eltron’s tankless water heaters offer a remarkable feature in the form of digital temperature control, providing users with a convenient and reliable means of adjusting water temperature to their exact preferences. This innovative technology ensures that you can customize the water temperature effortlessly, eliminating any last-minute surprises or inconveniences.

The digital temperature control panel on these water heaters boasts a user-friendly design, complete with a digital temperature display and preset temperature buttons. This thoughtful addition simplifies the process of fine-tuning your hot water to the perfect warmth.

Furthermore, the system incorporates memory buttons, streamlining the setup of preferred temperature settings. It’s like having your hot water tailored to your liking at the touch of a button.

One of the noteworthy aspects of this system is the interior solid copper heating system, which takes care of the heavy lifting. The robust copper heating elements efficiently and consistently heat the water to your specified temperature, ensuring a reliable supply of hot water on demand.

What’s particularly impressive is the extensive range of operating temperatures these tankless water heaters can accommodate. You have the flexibility to adjust the water temperature within a generous range spanning from 86 degrees to 140 degrees Fahrenheit. This breadth of options ensures that you can find the ideal temperature for your specific needs, whether it’s for a relaxing hot shower or a quick hand wash.

Regardless of your level of experience with tankless water heaters, adjusting the temperature is a breeze. The user-friendly interface ensures that it won’t be a time-consuming or complicated process.

To select your desired temperature, all it takes is a simple turn of the knob to your preferred setting. Once you’ve made this adjustment, the chosen temperature will be clearly displayed on the digital screen, providing you with instant feedback and peace of mind.

stiebel eltron tempra 24 plus Installation

The installation process of the stiebel eltron tempra 24 plus flow control electric tankless water heater is quite manageable, provided you follow the correct procedures. What’s particularly advantageous is that you can expedite the installation without the need for elaborate venting, making the entire setup more straightforward.

As I mentioned above its compact and sleek design of this electric is amazing, allowing it to be housed within a durable steel casing. This design versatility makes it suitable for a range of applications, whether it’s for residential use or commercial purposes. The adaptability of the Tempra 24 Plus underscores its flexibility and the broad spectrum of settings where it can excel.

However, it’s crucial to note that the installation requirements do include a 200A main service and a couple of 60-ampere circuits. These specifications are essential to ensure that the unit operates at its peak performance.

Despite its energy efficiency, this tankless water heater has substantial power demands to function effectively. Therefore, it’s imperative to confirm that your electrical setup can meet these power requirements before proceeding with the installation.

Safety Feature

The Stiebel Eltron Tempra 24 Plus incorporates a robust safety feature that ensures user protection and peace of mind. The heater is designed with seismic-proof construction, a vital feature that proves invaluable for individuals residing in regions prone to seismic activity. This construction enhances the unit’s resilience, providing a safeguard against potential damage during earthquakes.

Upon closer inspection, another notable safety element becomes evident: the thermal cut-off mechanism. This feature acts as a fail-safe by interrupting the electrical current if the unit shows signs of overheating. This proactive safety measure helps prevent potential hazards and ensures the system’s continued safe operation.

Given that the Stiebel Eltron Tempra 24 Plus is an electric heater, it eliminates many of the safety concerns associated with gas heaters. This feature minimizes the risks typically associated with gas leaks or carbon monoxide emissions, providing additional peace of mind for users.


Maintaining the Stiebel Eltron Tempra 24 Plus is refreshingly hassle-free, making it a standout in the world of water heaters. In fact, this unit requires minimal regular maintenance, thanks to its well-designed construction and efficiency. However, to ensure the longevity of your heater, a few simple practices can go a long way.

One recommended maintenance task involves periodically cleaning the aerator of your faucets. Over time, mineral deposits and sediment can accumulate, potentially impacting water flow. By keeping the aerator clean, you’ll ensure a consistent and unobstructed flow of water from your taps.

Another prudent step is to monitor and clear any dirt or debris that may accumulate on the filter screen within the unit itself. This filter screen is a vital component, and keeping it free from clogs or obstructions helps maintain optimal performance. Regular checks and cleaning, if necessary, will ensure the water heater operates efficiently.

It’s important to note that if your Tempra 24 Plus experiences a malfunction or more complex issues, it’s best to leave the troubleshooting and repairs to professionals. This water heater is a technologically advanced piece of equipment, and attempting DIY repairs could lead to more significant problems. Professional technicians are well-equipped to diagnose and address any issues correctly, preserving the unit’s functionality and safety.

Warranty Period

Stiebel Eltron is a company with a rich history of delivering dependable products. They understand that a company can’t survive in Germany if it doesn’t back its products. That’s why the company provides a 3-year warranty on parts. They also promise that there won’t be any leaks. The leakage warranty will protect your water heater for seven years.

Rest assured, Stiebel Eltron is synonymous with top-notch quality and performance. You can trust that their products are of the highest quality, and you don’t need to worry about their features or anything else.

Wrapping up The Review

First and foremost, we sincerely appreciate your continued engagement with our review.

My wife and I have invested significant time and effort into meticulously evaluating the Stiebel Eltron Tempra 24 Plus tankless water heater, and we’re delighted to share our findings with you.

If you find our review valuable, we kindly invite you to share this information with those who may benefit from it.

Throughout our research, we’ve encountered numerous Stiebel Eltron Tempra 24 Plus Tankless Water Heater Reviews, and they all concur on a fundamental point: this product is an outstanding choice for anyone seeking an energy-efficient water heater. Its compact size, efficient operation, and near-silent performance make it an exceptional option. Additionally, it boasts remarkable power.

One feature that truly stands out for us is its water flow management, which ensures consistent water temperature. If your goal is to have an uninterrupted supply of hot water without straining your monthly budget, the Tempra 24 Plus could be your ideal selection. Ultimately, the decision rests with you, but we can confidently affirm that it unquestionably merits the 5-star rating we’ve awarded it.


Q: How does a tankless water heater work?

A: Tankless water heaters, like the Tempra 24 Plus, heat water on demand as it flows through the unit, eliminating the need for a storage tank.

Q: What is the capacity of the Tempra 24 Plus?

 A: The Stiebel Eltron Tempra 24 Plus has a maximum flow rate of 2.6 gallons per minute (GPM) at a temperature rise of 92°F.

Q: Is professional installation required?

A: While it’s possible for experienced individuals to install this electric water heater, professional installation is recommended to ensure proper setup and adherence to safety standards.

Q: Does it require any venting?

 A: No, the Stiebel Eltron Tempra 24 Plus is a ventless, electric water heater, so it doesn’t require venting like traditional gas water heaters.

Q: Can it be used for a whole house?

A: Yes, the Tempra 24 Plus is designed to provide hot water for an entire house, depending on the demand and usage patterns.

Q: Is the temperature adjustable?

A: Yes, the temperature can be adjusted to meet your specific hot water needs.

Q: What are the energy efficiency features?

A: The Stiebel Eltron Tempra 24 Plus is known for its advanced microprocessor technology, which modulates the power input based on demand, resulting in energy efficiency.

Q: Is it suitable for hard water conditions?

 A: It is recommended to install a water softener if your water supply is hard, as hard water can affect the performance and longevity of tankless water heaters.

Q: Does it come with a warranty?

A: Stiebel Eltron typically provides a limited warranty for their products. Check the product documentation for details on the warranty coverage.

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