stiebel eltron tempra 24 plus review

Stiebel Eltron Tempra 24 Plus Review: Should You Buy It?

If you’re struggling with an old tank water heater not delivering enough hot water for your household or want to upgrade to a modern tankless heater, listen up! 

In this review, I’ll dive deep into whether the Stiebel Eltron Tempra 24 Plus tankless model is worth investing in.

From sizing up its key features to breaking down real-world performance, I’ve got you covered. Keep reading to learn if this unit is the upgrade your home needs for energy savings and endless hot water capacity.

Key Specs of Stiebel Eltron Tempra 24 Plus

The Tempra 24 Plus catches your eye right away with its sleek and modern design. But it’s what lies under the hood that makes this electric tankless heater stand out.

Stiebel Eltron Tempra 24 Plus

tempra 24 plus


  • 24kW/18kW Wattage
  • 2 x 50A Amperage Breaker required
  • 2 x 8/2 AWG Recommended Wire Size
  • Up to 5.0 Gallons Per Minute Flow Rate
  • Adjustable from 86°F to 140°F Range
  • 240V Voltage
  • Advanced Flow Control
  • 14.52″ x 16.54″ x 4.61″ Dimensions (H x W x D)
  • Approximately 16.1 lbs.
  • It is designed for optimal energy efficiency, reducing standby heat loss.

It leverages innovative modulation technology to precisely adjust power usage based on hot water demand from your faucets and appliances. This means it wastes no energy heating water when not actively running hot water.

The advanced flow control helps maintain a rock-steady output temperature, preventing annoying cold water surprises. This makes the Tempra 24 Plus a great option if your family often needs hot water from multiple sources simultaneously.

Top Benefits

SE tempra 24 plus
Tempra 24 plus. Credits: Flush-master

Ditching an aging tank for the Tempra 24 Plus directly translates into money back in your wallet each month. Owners frequently report saving $150 or more per year on utilities since the unit only draws power when heating water as needed. The long-term savings add up!

And with a beefy 24 kW heating capacity and up to 5 gallons per minute flow rate (or at least 2.4 GPM), you’ll never again have to worry about running out of hot water in a household with multiple bathrooms. 

Two people can take simultaneous showers while appliances run without issues. That peace of mind is priceless!

Potential Downsides to Consider

stiebel eltron tankless water heater performance in different US states
Different Tempra models and their output in different US states. Credit: Stiebel Eltron

I always believe in highlighting any potential drawbacks, no matter how stellar the overall product. 

For the Tempra 24 Plus, that comes down to three things:

Firstly, the total install cost falls on the higher end, averaging up to $1000+ depending on the need for service upgrades and labor among other things. However, many find the long-term energy savings make the initial expense worthwhile.

Secondly, integrating the electrical requirements for the 24 kW unit can prove tricky if your home’s current panel maxes out. 

Upgrading breakers may add cost. Proper load calculation and electrical service planning are a must! It is not a project that’s doable by itself for most DIYers.

As with any other electric tankless water heaters, Tempra 24 Plus is not good for cold climates.

In-Depth Review

stiebel eltron tempra 24 plus

Putting the Tempra 24 Plus under intense, real-world testing shows how its sophisticated heating technology translates into tangible savings month after month. I analyzed dozens of verified owner reviews mentioning $150+ annual savings.

And not only does it heat water efficiently, but it does so consistently even as usage ebbs and flows. Numerous first-hand reports back up Stiebel Eltron‘s claim that advanced flow control prevents temperature fluctuations.

This level of performance over 5+ years of continual operation speaks volumes on durability too. 

Plus, owners comment on the unit’s low maintenance needs outside occasional descaling. All said it’s built to last decades!

The Final Take

For households that routinely use hot water simultaneously across multiple fixtures, I strongly recommend the Stiebel Eltron Tempra 24 Plus. Its energy-saving modulation technology and ample flow rate capacity make it a perfect match.

You can rest assured no one in your family will ever again have to cut their shower short. The long-term durability and reliability will keep your utility savings adding up for over 20 years!

While it carries a higher install cost than basic models, and it’s not as useful in icy cold climates, the investment pays dividends through energy efficiency and essentially unlimited hot water – especially for larger homes.

Frequently Asked Questions

Are Stiebel Eltron water heaters good?

Yes, as a German-engineered brand, Stiebel Eltron builds exceptionally high-quality water heaters with advanced heating technology and premium materials for long-lasting performance. Their tankless units in particular stand out for energy efficiency and consistent temperature control compared to cheaper imports. I would certainly recommend them as a top option.

What sets the Stiebel Eltron Tempra 24 Plus apart from traditional water heaters?

The Tempra 24 Plus leverages innovative modulation technology that traditional tank heaters lack. It adjusts power consumption and heating on precise demand rather than maintaining constant heating. This results in much greater energy efficiency over outdated models. The advanced flow control also delivers steady output temperature regardless of usage rate.

How does the Advanced Flow Control feature benefit users of the Tempra 24 Plus?

It maintains the set hot water temperature even when multiple water sources are running simultaneously around your home. You’ll never end up with annoying cold water bursts or fluctuations unexpectedly. The entire family can shower back-to-back while appliances run without compromise thanks to consistent temp control.

Is the Stiebel Eltron Tempra 24 Plus suitable for DIY installation enthusiasts?

Most DIY-savvy homeowners will find the Tempra 24 Plus installation rather difficult, especially due need for complicated service upgrades. Of course, working with 240V electrical connections carries risk, so exercise caution. Hiring a licensed technician is recommended to be 100% safe when it comes to electrical. Either way, owners widely praise its simplified setup compared to other tankless units.

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