One of the most powerful electric tankless water heaters available today, the 36 KW Stiebel Eltron Tempra 36 Plus tankless water heater was designed primarily for high flow rate applications in cold climates where the incoming water temperature can drop below 40° F. It is also a popular choice for homes and commercial applications in warmer climates where very high flow demands (up to 8 gallons per minute depending on the incoming water temperature) are necessary due to multiple large simultaneous hot water demands.

Like all Tempra Plus Series tankless water heaters, the Tempra 36 Plus features true microprocessor-controlled temperature regulation as well as a convenient digital temperature display and dial selector which allows you to set the desired output water temperature at any level between 68 and 140F (20 and 60C). It is one of the only tankless water heaters on the market that features a true thermostatic temperature control and full power-modulation based on both the incoming water temperature and the water flow rate. The Tempra 36 Plus will automatically adjust its power output to accommodate changes in the incoming water temperature and flow rate so it can precisely maintain the desired output temperature.

The Tempra 36 Plus also features Stiebel Eltron's exclusive dynamic Advanced Flow Control technology. This technology automatically adjusts the flow of water when the unit's sensors detect that the flow demand is exceeding the heater's capacity. This feature is particularly useful in cold climates and other applications where the electrical service size does not permit the installation of a larger model and it may be desirable to handle occasional high flow demands. It is also desirable where high output temperatures are required for temperature critical applications (commercial dishwashers, etc.) and where flow rates are not always predictable.

Dynamic Flow Control Technology
exclusive to Tempra Plus tankless water heaters!

Simply stated, the Stiebel Eltron Tempra Plus Series electric tankless water heaters feature the most precise temperature control of any tankless water heater on the market today!

• Digital Display
• Flow Control Technology
• 36 kW's of Power
• Thermostatically Controlled
• Requires 300 Amp Service

Stiebel Eltron Tempra 36 Plus Specifications

* Breaker size and wire gauge must meet all applicable local, state, provincial, and national electrical codes for your area - these are only guidelines that will apply to most installations. Some codes require use of electrical sub-panel for installation, especially when heater is not mounted within line-of-sight of the main electrical panel. Wiring should be sized to maintain a voltage drop of less than 3% under load. Please consult your electrician for more details.

How it works

The Stiebel Eltron electric tankless water heater is a marvel of technology and engineering - overflowing with technology, yet packaged in an intelligent, simple design. It heats water entirely on demand, only when it is needed.

When a hot water faucet is turned on and the water begins to flow, a sophisticated flow sensor detects that hot water is being demanded and turns the water heater on. Instantaneously, a series of sensors gather information about the flow rate of the water and the incoming water temperature. This information is sent to a microprocessor which calculates the amount of power needed to heat the water to the temperature set point. The water flows through the internal heating modules and exits the unit at the desired temperature. The start-up process takes a couple of seconds. A convenient thermostatic control on the front of the unit allows the homeowner to select an output temperature between 68 and 140F (20 to 60C) [Note: some models are designed for maximum output of 125F (52C)].

The sensors continue to monitor the water flow rate and incoming water temperature as long as the water is running. They constantly send data to the microprocessor so power to the heating elements can be modulated in accordance with changes in incoming flow rate and temperature. If, for instance, the flow rate increases because a second demand for hot water in the home is initiated, the unit will increase its power output to maintain a consistent and precise output temperature.

The tankless water heater will remain on until the hot water faucet is closed. As soon as the flow sensor detects that water has stopped flowing, the power to the unit is completely turned off.

All Stiebel Eltron Tankless Water Heater Tempra and Tempra Plus Series water heaters are manufactured in Germany in one of the world's only ISO-9001 certified tankless water heater manufacturing plants by a company that has been around since 1924!

Please see the internal views of the Stiebel Eltron Tankless Water Heaters below for more details. All of the models utilize the same parts and technology, but have varying sizes and numbers of heating modules.

*Note: The Tempra 36 Plus and Tempra 29 Plus
have 3 heating modules.

	Electronic Control Module Sophisticated microprocessor-controlled electronics adjust the power output of the heating modules based on flow rate and incoming water temperature to precisely regulate the output water temp.
	Heating Module The muscle of the system! A series of very high output heating modules (up to 3, depending on model) are used to heat the water as it passes through the heating chambers of the water heater. Each heating module features multiple heating elements. The heating chambers are manufactured with copper - no cheap plastics here!
	Flow Sensor A sophisticated flow rate sensor delivers important data to the microprocessor on a continuous basis - this data is used by the microprocessor to calculate the power level of the heating modules that is necessary to heat the water to the set temperature.
	Safety Thermal cut-off Safety first! Each heating chamber is protected by thermal limit switch, a back-up safety feature that will automatically turn off the heating module if a potentially unsafe output water temperature is reached. This reduces the risk of scalding injuries for children and the elderly, and protects the unit from damage if the microprocessor-based thermostatic control fails.
	Temperture Selector Set it and forget it - use the simple dial control to raise or lower the temperature setting. Tempra Plus series are equipped with a digital temperature setting display. The temperature can be set at any level from 86F (30C) & 140F (60C) [up to 125F or 52C on Tempra 12, 15, and 20] (Not pictured).
	Temperature Sensors Working in conjunction with the flow sensor, a series of temperature sensors deliver important data to the microprocessor on a continuous basis so that the unit can acurately maintain the set output water temperature.
	Wiring Block Convenient terminal blocks are provided to ensure a quick, simple, and safe installation. Installation by a licensed electrician is highly recommended.
	Flow Control Exclusive to Tempra Plus models, the dynamic Advanced Flow Control system will adjust the flow rate of the water if the microprocessor detects that the flow rate exceeds the capacity of the system. The result is the most precise temperature control of any tankless water heater on the market today! Ideal for applications where simultaneous hot water applications occassionally exceed normal model flow rate capacities.
	Sturdy Hinged Steel Case All Stiebel Eltron Tempra and Tempra Plus Series water heaters are housed in a sturdy steel case with built-in wall mounting brackets. Many competitors use flimsy light-gauge aluminum cases or even plastics. Tempra Plus and Tempra Trend models feature a convenient hinged case for easy access.
	Inlet Water Filter The inlet water pipe includes a small screen filter that ensures that no debris is able to enter the system. This filter can be periodically cleaned for optimal flow performance.

Stiebel Eltron Tempra 36 Plus - 239225 Reviews

Tankless water heater
Best service I've ever had Working great and we love it - Carol Bunyard

Definitely should get if you have a large family
I bought my first Stiebel Eltron Tempra 36 Plus 14 years ago. it was the first generation. I am in the throws of full house renovations and so I bought the new 3rd generation. In 14 years, never once have I had to service the unit. Reliable 100% of the time. We are a family of 8, and the shower is used multiple times a day, every day and our washing machine operates 365/yr. Add to that a dishwasher, and other daily water uses that demand hot water. This is definitely an excellent investment, just by never having to worry about running out of hot water. Add to that, it takes virtually no space, compared to the gas heating/water tank system that was here when we bought the house. The only issue...and it's not a biggie, is that it does require a lot of amps to install, 3 x 60 amps. That said, I upgraded my electric panel to accommodate the new unit along with the other upgrades I did in my renos, however, it was not really an issue for the previous 14 years with my 1st gen unit. This unit pays for itself in the first year (and its really not expensive to start). If you have a large family and need a lot of reliable hot water, and not wanting to worry about showers going cold after 15 minutes of use and waiting an hour for the traditional method of your water tank to fill up for the next shower....then by all means, do yourself a favour and buy a unit. - Jack Daniels

Tempura 36 Plus
This is the second house that I have built using Stiebel Eltron Tempra 36 Plus tankless on demand water heater. It is an excellent product that is both extremely efficient and has no green house emissions. - Pat

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Stiebel Eltron Tempra 36 Plus - 239225 Customer Questions & Answers

Do You Have Hard Water?

Hard water treatment helps maintain performance and efficiency, ensures optimal water flow and pressure, and protects your heater from pre-mature failure due to mineral build-up inside the heating module and other components.