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  • Works as 2-in-1 model with 28.8 kW of power at 240V and 21.6 kW at 208V
  • Advanced flow control ensures a constant temperature output
  • Single flow sensor design
  • Superior, reliable performance with seismic-proof construction
  • Sleek, no-vent design that is nearly 100% efficient
UPC Code: 00094922100689
Shipping: Usually Ships in 2-3 Business Days

Other Products from this Line

Stiebel Eltron Tankless Water Heaters

Stiebel Eltron Tankless Water Heaters

Hi I’m Mike Dunn with Stiebel Eltron. Today I’m going to discuss the benefits of tankless electric hot water heaters. Often called On Demand instantaneous water heaters, they differ from tank water heaters. If you are considering buying one, it’s important to choose the right size and model. With a tank water heater, you can turn on one fixture, then another, and so on. Hot water flows from each fixture until the tank runs out. With a tankless water heater, turn on a fixture, and the hot water never runs out. But turn on too many fixtures, and it cannot keep up. Choosing the right tankless water heater means knowing how many fixtures must run at the same time, then hot water is truly endless. A tankless electric water heater has other advantages. It needs very little room, doesn’t need venting, and doesn’t need propane or gas lines coming into the house. With no tank full of hot water to cool off, there are no stand-by energy losses, resulting in savings of 10-30 percent. Tankless electric water heaters are also 99-100 percent efficient. There are various sizes of tankless electric water heaters to consider. The smallest models are designed to provide warm water for hand washing. Larger models can supply warm or hot water at a single sink, and the largest models can provide endless hot water to an entire house. The more fixtures you supply with hot water at the same time, and the colder the climate you live in, the more powerful the tankless hot water heater you will need. So why not just install the most powerful unit available? For one, expense. Why pay for more than you need? Plus, installing the most powerful units may require upgrading electrical service to the house. So how do you choose? All tankless electric manufacturers supply sizing charts. These charts are based on the flow rate, the number of fixtures that need hot water at the same time, and temperature rise: the difference between the cold water temperature and how hot the water must be. The flow rate is calculated on how many fixtures need hot water at the same time, not how many fixtures are in the house. This is usually the number of showers taken at the same time. Lastly, electrical requirements must be checked to make sure you have enough power in the house to run these units, especially when the largest of the whole house models are needed. Now that you know more about tankless electric water heaters, you can make the right selection for your home.

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Choosing the right tankless electric water heater has never been easier than with Stiebel Eltron! If you aren’t sure which model you need for your business, simply utilize the manufacturer’s flow chart and determine which heater will serve you best!

Stiebel Eltron 239223 Specs
Width 16 5/8 Inches
Depth 4 5/8 Inches
Height 14 1/2 Inches
Amps 120 Amps
Hertz 60 Hertz
Phase 1 Phase
Voltage 240 Volts
Wattage 28.8 Kilowatts
Flow Rate .87 GPM
Power Type Electric
Style Tankless
Type Water Heaters
Usage Multiple Points of Use

Customer questions about this product

How hot will this water heater make my water?
This unit's ability to heat your water above its ambient temperature varies dependent upon the water's flow rate.
Can this electric water heater supply hot water to more than a single restroom sink?
This unit is designed to supply hot water to a single restroom, kitchen, or utility sink. It can also be used on a single shower or up to 5 low flow sinks. The manufacturer’s literature offers a sizing guide to help you choose the best model for your needs.
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Stiebel Eltron 239223 Details

The powerful Stiebel Eltron 239223 Tempra 29 Plus whole house tankless electric water heater instantly provides hot water to up to five medium flow sinks! The most technologically advanced tankless water heater on the market today, the Tempra Plus boasts Advanced Flow Control technology that automatically adjusts the flow of water to eliminate unpleasant temperature fluctuation, giving you a consistently satisfying experience each and every time no matter how great the hot water demand!

Activated by a minimum 0.87 GPM flow rate, the Tempra 29 Plus features an ergonomic control knob that allows you to adjust the water temperature from 86 to 140 degrees Fahrenheit, and a crystal clear digital display that allows for simple monitoring. This energy-efficient unit works as a 2-in-1 model that can use 28.8 kW of power with 240V service and 21.6 kW of power with 208V service to heat the water as it flows through the machine for complete elimination of standby heat loss.

Overall Dimensions:
Width: 16 5/8"
Depth: 4 5/8"
Height: 14 1/2"

Because this item is not stocked in our warehouse, processing, transit times and stock availability will vary. If you need your items by a certain date, please contact us prior to placing your order. Expedited shipping availability may vary. We cannot guarantee that this item can be cancelled off of the order or returned once it is placed.

  • ETL US & Canada

    ETL US & Canada

    This item meets the electrical product safety standards imposed by the ETL, a division of the Intertek Group, for use in the United States and Canada.

  • Hardwired


    This product must be hardwired; it does not plug into a standard wall outlet.

Resources and Downloads for
Stiebel Eltron 239223

Spec Sheet Specsheet Warranty Warranty Sizing Guide Sizing Guide Brochure Brochure

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