Stiebel Eltron Tempra 29 Plus Review


Stiebel Eltron Tempra 29 Plus is one of the most technologically advanced and reliable Tankless Water Heaters currently available in the market. Stiebel has redesigned its Tempra series units and the new Tempra Plus range of water heaters have advanced Flow Control system, heavy-duty electronics, hinged cover and simplistic single flow sensor design.  In comparison to other gas tankless models the Tempra plus range is very affordable, energy efficient and long lasting. Installation is fairly simple and user friendly since venting is not required. This heater has a digital temperature display and easy-to-use dial selector through which you can set your desired output water temperature between 86 and 125F/30 and 52C. The best feature of Tempra 29 Plus is that it automatically senses and adjusts water flow rate as well as its temperature and calculates the amount of power required to heat the water. This is how it applies exactly as much power as is needed to maintain the demanded output temperature despite the changes in flow rate. We recommend that you get it installed by a professional.


  • Reliable heater with sleek, space saving European design that easily fits anywhere as it is relatively smaller than a tank
  • Digital display for temperature selection and controlling
  • Venting not required
  • 208 or 240 Volt electric connection is required with a max draw of 21,600W at 208V or 28,800W at 240V
  • Power draw= 120amps
  • Requires 50amp circuit breakers and 8gauge copper wiring
  • 99% energy efficiency and 15-20 percent savings
  • ETL listed for abiding with CSA and UL safety standards in the United States and Canada
  • Excused from Seismic Code
  • Contains thermal and overheat safety protection
  • Three year residential and commercial warranty under normal use
  • Advanced flow control feature allows automatic flow reduction in delivering water if demand exceeds capacity

The Pros & Cons of the Stiebel Eltron Tempra 29 Plus


  • This is comparatively a better choice than tank-type water heater models especially in hard water areas because you can set it on low temperature for minimizing scale formation
  • Space saving and stylish design immediately fits into any given area
  • Digital thermostat keeps water to the exact same temperature as you set
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    Advanced Flow Control ensures you get hot water regardless of the demand. That is, no matter if one shower is in use or three water temperature remains constant
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    At least 15 to 20 percent electricity bill is saved on hot water production
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    User manual is very helpful and explanatory
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    Easy to install unit without requiring expensive mixing of valves or additional temperature regulators
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    No need to drain and clean your storage tank every year and replace anode rods because it heats water directly and thus, there is no storage tank


  • The unit needs dedicated water line
  • Some users complain that while the heater is in use a number of other appliances like bulbs or fluorescent fixtures start flickering
  • Installation is although easy but a bit expensive because you will need a new electrical box, 8gauge wire and 3x50amp breakers. Plus, a professional electrician only can install it

Installation and Specifications

You need to install Tempra 29 Plus unit vertically in a way that the water fittings point downwards. Installation is pretty straightforward. All you need to do is arrange three 208-240V lines, that is, six spaces in your breaker panel and 8gauge copper wiring. For plumbing you may choose between CPVC and Copper. If you use copper then we would recommend using sharkbite / gatorbite fittings. The heater has five mounting points so that you could easily mount it on the watt. You may easily mount it on the wall with drywall anchors.


Amperage (amps)120
Electric Product TypeCommercial & Residential
Finish FamilyGray
Minimum Temperature (F)86
Product Weight (lb.)17.6 lb
Water Connection LocationBottom
Wattage (watts)28800
Minimum Activation Rate (gpm)0.87
Maximum Temperature (F)140
Flow Rate @ 35 F Rise (gallons/min)5.62 gal (US)/min
Flow Rate @ 45 F Rise (gallons/min)4.37 gal (US)/min
Fuel TypeElectric
Product Depth (in.)4.625
Product Height (in.)14.5
Product Width (in.)16.625
Water Connection Size (in.)3/4” NPT

Common Problems

Never use substandard wiring while installing this unit and always use those recommended by the maker. If you use low-quality and/or very thin wiring the chances of putting your house on fire are high. Moreover, never install the heater yourself and ask for professional help.  Use detachable water connections like the braided steel flex connectors for ensuring periodic filter cleaning especially flushing away scale if there is hard water. If you aren’t certain about the electrical capacity within your household then consult an electrician before purchasing the product.


Tempra® Plus is a very reliable, affordable and easy-to-use tankless water heater. It is equipped with the Advanced Flow Control technology that ensures the water temperature remains constant no matter how much the demand exceeds. This means you will receive a satisfying supply of hot water as per your requirement without the fear of cold water splashes while bathing or dishwashing. For this price tag it is the best choice in the currently available water heaters.

You can buy the Stiebel Eltron Tempra 29 Plus on Amazon.

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