Stiebel Eltron Tempra 29 Plus Review (Electric Tankless model)

The heavy use whole house electric tankless water heater that comes with a high end performance.

Tankless water heaters are an excellent way to lower your energy bill while also ridding yourself of complicated exhaust systems and bulky water tanks. But what if you aren't sure which heating unit is the right one for you?

As a licensed HVAC specialist, there are a few brands I recommend over and over again. One of them is Stiebel Eltron, a company known for its efficient, long-lasting water heaters.

I'm particularly fond of the following model:

Stiebel Eltron Tempra 29 Plus Electric Tankless Whole House Water Heater, 240 V, 28.8 kW

This model is the higher version of the Stiebel Eltron Tempra 24 plus which is a best rated heater in that price range.

It's a mouthful, isn't it? But don't worry. We can dissect this product piece by piece until you're confident that it's a tankless water heater worth the money.


The Tempra 29 is what's known in the industry as a "whole house" unit. While some units are "point of use" units that must be installed directly at the sink or shower where you want hot water, the Tempra 29 can be installed anywhere in your home, and it'll service all of your taps simultaneously. This is because the Tempra 29 is a workhorse unit with240v and 150 PSI.

As for flow, you'll get an impressive 4.37 gallons per minute (gpm) out of this machine. You'll also have the freedom to adjust your water temperature between 86°F and 125°F.

If that isn't enough, the Tempra 29 is also a surprisingly small unit for such a powerful beast. At just 17 pounds, it can be mounted anywhere, even under a sink or inside a closet.


The Tempra 29 is an electric heating unit, and that means you'll be completely free of vents, fumes and live flames. Unlike natural gas units, an electric tankless water heater warms your water through coils instead of burners.

It's also a model designed for convenience. It boasts a digital interface where you can control your water temperature down to the degree, and the dial selector is simple and easy to use, allowing you to customize your hot water delivery to your exact specifications.

Generally speaking, the Tempra 29 is the kind of water heater that you can install and forget. It doesn't require special maintenance or attention beyond a general inspection every so often, so you can use it as a replacement for your existing water tank without thinking twice.

Heat Output and Flow

With pressure up to 4.37 gpm and temperatures up to 125°F, you'll never lack for hot water with the Tempra 29. It should be noted, however, that you might experience flow delays with excessive simultaneous usage. For example, while running two showers at the same time might not affect the unit's performance, two showers and a dishwasher might bring on the flow delays.

If you experience this problem, just adjust your dial until your desired flow and temperature are compatible again.

Another great thing about the Tempra 29 is the amount of energy you'll save when you make the switch. According to Stiebel Eltron, you can expect to lower your energy consumption by 15 to 20 percent when you use this model. That translates into hundreds of dollars of savings per year.


Every product has a flaw, and for the Tempra 29, it's installation. While it can be done with patience and a knack for DIY, I almost always recommend that customers allow a trained technician to install the unit instead. Not only will this prevent accidents and issues down the line, but a technician will also be better equipped with the following tools:

  • Electrical box
  • Amp breakers
  • Ground lines
  • Wires, circuits and panels

Depending on your home, you may or may not need some of the above, but a technician will have you covered even if you do.

General Use

As with any purchase, you'll want to consider both the pros and cons of your tankless water heater before actually swiping your credit card. Here's a quick overview of the Tempra 29.


  • Powerful unit that can service multiple rooms simultaneously
  • Adjustable controls down to the degree
  • Excellent long-term energy savings


  • Installation can be tricky
  • Not the most affordable model on the market
  • Some customers report flow delays with simultaneous usage

What's the bottom line?

All in all, the Tempra 29 is a four-star product. It isn't quite flawless, but its drawbacks are minor compared to the conveniences you'll enjoy and the lower bills that will come in your mailbox.

If you're looking for a strong, long-lasting tankless water heater, check out the Tempra 29 on Amazon.

Image credits: Stiebel Eltron

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