Are you tired of cold showers when someone runs the dishwasher? Frustrated with high energy bills heating stored water? This review breaks down how Stiebel Eltron tankless water heaters perform—and what you really need to know before buying.
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What Is a Stiebel Eltron Tempra Tankless Water Heater?
Stiebel Eltron is a German brand that’s been making heating systems since 1924. Their Tempra series offers electric, on-demand hot water without a bulky tank. If you want compact, efficient, and modern, Tempra could be the upgrade you need.
How It Works
The Tempra models use a microprocessor to adjust heating power based on flow rate and incoming water temperature. When you turn on hot water, the unit ramps up immediately and adapts in real time—so your shower stays at a steady temperature even if someone else taps a faucet.
Key Features That Set Tempra Apart
- Advanced Flow Control™: This tech reduces water flow—not heat—to avoid sudden cold water bursts during high use.
- Self-Modulating Heating: Wastes less energy by adjusting power to match demand, improving efficiency.
- No Venting Needed: Wall-mounted and compact—take up minimal space and install almost anywhere.
- Digital Controls: Simple dial control, memory presets, and digital display for precise temperature settings.
- Solid Warranties: Usually 7 years on the heat exchanger and 3 years on parts for most models.
Comparing Tempra Models
| Model | Power (kW) | Max Flow (GPM) | Electrical Setup | Ideal Use |
|---|---|---|---|---|
| Tempra 24 Plus | 24 kW | 4.7–5.0 | 100 A service (2×50 A breakers) | Small households, single shower or couple of fixtures |
| Tempra 29 Plus | 28.8 kW | 5.5–5.7 | 120 A service | Moderate demand, two bathrooms or simultaneous fixtures |
| Tempra 36 Plus | 36 kW | 7.0–7.5 | 300 A recommended (3×50 A breakers) | Whole-house use, multiple showers at once |
What Real Users Say
Homeowners report that Tempra units go from cold to full flow quickly and quietly. Many praise the consistent temperature—even during high demand. But in hard water areas, scale can build up inside the heater. Most users flush vinegar-based or commercial descaling solution every 8–12 months to keep things working well.
Pros and Cons at a Glance
👍 Advantages
- Endless hot water—no waiting for tank recovery.
- Highly energy-efficient—99% or better since there’s no standby heat loss.
- Compact, wall-mounted design—saves space and no venting needed.
- Flow control technology reduces temperature fluctuations.
- Low operating noise.
⚠️ Drawbacks
- High upfront cost and potential electrical upgrades (especially for Tempra 36 Plus).
- Requires minimum water flow—some low-flow fixtures won’t activate heating.
- Periodic maintenance needed in hard water zones.
- No built-in Wi-Fi or hot-water recirculation feature.
Who Should Pick a Tempra Heater?
If you value space-saving design, low noise, and precise water temperature—Tempra delivers. Decide based on your household size and how many fixtures run at once:
- Tempra 24 Plus: One shower or minimal hot water use.
- Tempra 29 Plus: Moderate use across two bathrooms.
- Tempra 36 Plus: Heavy use—multiple showers, appliances, or whole-house demand.
Installation and Maintenance Tips
- Check your home’s electrical panel. Larger models may need upgraded service.
- Hire licensed pros—these units require careful electrical wiring and grounding.
- Flush the heater annually if you have hard water. This prevents mineral buildup and keeps it efficient.
- Consider a water-softening system in your home to reduce scale and extend heater lifespan.
Expert Opinions and Industry Recognition
In recent reviews, leading industry sources highlighted Tempra 29 Plus and Tempra 36 Plus for steady output and energy savings. The units frequently appear on “best of” lists for electric tankless heaters, praised for flow consistency, compact design, and build quality.
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Final Verdict
Stiebel Eltron’s Tempra series offers dependable on-demand hot water with excellent energy efficiency and a sleek, vent-free design. If your home can support the electrical requirements—especially for the Tempra 36 Plus—it’s a high-quality, long-term solution. Models 24 and 29 work well in smaller or moderate-demand settings, while the 36 is ideal for full-house simultaneous use. Expect to perform routine maintenance if your water is hard.
Should You Buy One?
Yes—if you’re ready to upgrade to efficient, reliable, and modern hot water delivery. Just plan your electrical upgrade, maintain it properly, and pick the right size. With strong industry praise, great warranties, and consistent performance, Tempra is a smart long-term pick.
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Key Takeaways
- Reliable hot water delivery: Flow control keeps temperature steady even under demand.
- Choose wisely: Tempra 24, 29, and 36 fit different household sizes. Ensure proper electrical setup.
- Maintenance matters: Flush yearly if you have hard water and consider softening to preserve performance.
- Energy efficient: No standby loss—just heated water when you need it.
Want Help Picking a Model or Installer?
Let me know your household size, number of bathrooms, and water conditions—I can help you select the right Tempra model or find qualified electricians in your area.
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