Stiebel Eltron Tempra 24 Plus Specs & Review (2025): Full Guide to This Top Tankless Heater
Looking for endless hot water and big energy savings in a premium, German-engineered package? The Stiebel Eltron Tempra 24 Plus electric tankless water heater is one of the most advanced whole-house models available—delivering powerful performance, digital precision, and legendary reliability. If you want to know whether the Tempra 24 Plus is right for your home, you’ll find all the specs, features, and buying advice right here.
Quick Specs: Stiebel Eltron Tempra 24 Plus
- Type: Whole house electric tankless water heater
- Power: 24 kW, 240V, 100A (requires 2 x 50A double-pole breakers)
- Max Flow Rate: 4.0 GPM (gallons per minute) at a 38°F temperature rise
- Temperature Range: 86°F–140°F, digitally adjustable in 1-degree increments
- Self-Modulation: Advanced flow control and automatic power adjustment for steady temps
- Dimensions: 16.6” H x 14.5” W x 4.6” D
- Weight: 15.4 lbs
- Water Connections: 3/4″ NPT
- Min. Water Flow to Activate: 0.5 GPM
- Warranty: 7 years against leaks, 3 years on parts
- Country of Manufacture: Germany
- Certifications: ETL Listed, ANSI/UL 499, CSA, Energy Star compliant
Key Features of the Stiebel Eltron Tempra 24 Plus
- Advanced Flow Control: Automatically maintains constant temperature—even if demand changes
- Digital Display: Precise temperature adjustment with easy-to-read LCD
- Silent Operation: No noisy mechanical switches or relays—runs nearly silent
- Space-Saving Design: Mounts on the wall, freeing up floor space
- Self-Modulating: Adjusts power draw automatically to meet hot water needs—saves energy
- Durable Copper Heating System: Corrosion-resistant, long-lasting, and efficient
- Hard Water Friendly: Resists scale buildup with proper maintenance
- Eco-Friendly: No venting or exhaust, no standby heat loss
Who Is the Stiebel Eltron Tempra 24 Plus For?
- Homes with 2–3 bathrooms in moderate-to-warm climates
- Apartment buildings, condos, and small commercial spaces needing endless hot water
- Energy-conscious homeowners wanting precise temperature control
- Anyone replacing an old tank heater who wants space savings and lower bills
Buyer’s Guide: Choosing the Right Size Tankless Water Heater
- Flow Rate: Calculate your peak demand (showers, sinks, appliances running at once). Tempra 24 Plus handles 2 showers or 1 shower + 2 sinks at the same time in most climates.
- Electrical Requirements: Needs 240V, 100A total, and professional installation with #6 AWG wiring. Check your panel before purchasing.
- Incoming Water Temperature: Colder climates (under 50°F) may see lower GPM—check sizing charts for your region.
- Warranty & Support: Choose reputable brands with a clear warranty and US-based customer service.
Detailed Review: Stiebel Eltron Tempra 24 Plus
- Performance: Delivers steady, non-stop hot water for families and busy homes—no “cold water sandwich.”
- Energy Savings: Self-modulation means lower bills and less wasted energy compared to tank models.
- Easy Operation: Digital controls make it simple to set your preferred temperature, and the unit remembers your settings even after a power outage.
- Quiet & Reliable: Many users say it’s “whisper quiet” and trouble-free for years with basic maintenance.
- German Quality: Built to last with premium parts and rigorous testing.
Pros:
- Advanced digital temperature control and flow adjustment
- Handles 2–3 fixtures at once (in warm climates)
- Space-saving, wall-mounted design
- High efficiency, low energy bills
- Excellent warranty and support
- Very quiet operation
Cons:
- Requires significant electrical capacity (not for every home)
- Lower flow rates in very cold climates (may need Tempra 29 or 36 for larger homes/cold states)
- Professional installation recommended
Final Verdict: The Tempra 24 Plus is a standout electric tankless heater—perfect for most families looking to upgrade, save space, and control hot water precisely.
See it on Amazon
Comparison Table: Stiebel Eltron Tempra 24 Plus vs. Competitors
| Model | Power | Max Flow Rate | Temp Range | Warranty | Best For | Price Link |
|---|---|---|---|---|---|---|
| Stiebel Eltron Tempra 24 Plus | 24 kW/240V | 4.0 GPM | 86–140°F | 7 yr leak/3 yr parts | 2–3 baths, most US homes | View |
| EcoSmart ECO 27 | 27 kW/240V | 6.5 GPM | 80–140°F | Lifetime (residential) | Larger homes, warmer climates | View |
| Rheem RTEX-24 | 24 kW/240V | 5.9 GPM | 80–140°F | 5 yr HEX | Medium homes, moderate climates | View |
FAQ: Stiebel Eltron Tempra 24 Plus
- Can I install the Tempra 24 Plus myself?
It requires 240V, 100A service, and #6 AWG wiring. Professional installation is strongly recommended for safety and warranty. - Is it good for hard water?
Yes, but annual descaling is recommended to prevent scale in hard water areas. - Does it work with recirculation pumps?
Yes, but confirm with your plumber and the pump manufacturer for the right setup. - What happens in winter/cold climates?
Flow rate drops with lower incoming water temps. For very cold states, consider the Tempra 29 or 36 Plus. - Is it noisy?
No, it operates nearly silently—far quieter than gas or tank heaters.
Conclusion
The Stiebel Eltron Tempra 24 Plus is a premium choice for homeowners who want endless, reliable hot water and serious energy savings. With digital controls, advanced features, and proven performance, it’s a top pick for most families upgrading from a tank. Ready for hassle-free, on-demand hot water? Click to see the latest price and enjoy modern comfort today!