German engineered and manufactured to the highest European industrial standards, the Stiebel Eltron Tempra 24 Plus is a whole-house on-demand electric tankless water heater delivering endless, instantaneous hot water. Featuring patented Advanced Flow Control technology that automatically adjusts water flow to ensure stable, non-fluctuating water temperature even during sudden high-demand spikes across multiple bathrooms. Delivers 24 kW heating output with up to 4.68 GPM flow rate, precision digital digital microprocessor display, copper heating chambers, and 99% energy efficiency.
Patented Advanced Flow Control: Automatically adjusts flow during peak household demand to guarantee constant, non-fluctuating water temperature. Endless On-Demand Hot Water: Provides up to 4.68 GPM continuous hot water without standby standby heat loss from traditional tank storage.
German Precision Engineering: Designed and built in Germany with solid copper heating chambers and solid-state microprocessor controls. Digital Microprocessor Display: Backlit digital display allows exact temperature adjustment from 68°F to 140°F (20°C to 60°C) in 1° increments.
Ultra-Compact Wall Mounted: Saves up to 12 square feet of floor space compared to 50-gallon conventional water heater tanks.
Figures for this model. If you need a detail that isn’t listed, ask us and we’ll check before you order.
Ask about this model| Power Rating | 24 kW at 240V (18 kW at 208V) |
|---|---|
| Amperage Draw | 100 Amps (Requires 2 × 50 Amp double-pole breakers & 2 × 8 AWG wire runs) |
| Max Flow Rate | 4.68 GPM (At 35°F rise); 2.74 GPM (At 60°F rise) |
| Min Flow to Activate | 0.37 GPM (1.4 L/min) |
| Working Pressure | 150 PSI max (tested to 300 PSI) |
| Plumbing Connections | 3/4-inch NPT male brass fittings |
| Heating Element Material | Solid copper cylinder chambers with nichrome bare-wire elements |
| Temperature Range | 68°F – 140°F (20°C – 60°C) digital adjustable |
| Dimensions (H × W × D) | 14-1/2" × 16-5/8" × 4-5/8" |
| Weight | 15.4 lbs (7.0 kg) |
| Certifications | ETL listed to UL 499, CSA certified, Lead-Free compliant |
| Warranty | 3-Year Limited Warranty on parts & copper chambers |
These come with the machine.
Reviews from Stiebel Eltron Tempra 24 Plus owners.
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Contact usIt requires 240V single-phase electrical service with two separate 50-Amp double-pole circuit breakers and two runs of 8/2 AWG copper wire. A 200-Amp main household electrical panel is recommended.
Unlike cheap heaters that drop water temperature when multiple fixtures turn on, the Tempra 24 Plus automatically slows the flow slightly to ensure every drop comes out at your exact target setpoint.
Yes. In southern and central US climates, it easily supports 2 to 3 simultaneous showers. In northern winter climates, it comfortably handles 1 to 2 simultaneous high-flow showers.
No. Because it is 100% electric, zero combustion or gas venting is required, allowing it to be installed inside closets, utility rooms, or bathrooms.
Because it heats water only on demand and never stores 50 gallons of standby water, it typically reduces water heating energy costs by 15% to 25%.
Groundmark provides free residential delivery from Dallas, TX, a 30-day return policy, and full 3-year warranty backing.
Delivery is free to residential addresses. Orders ship from our Dallas, TX warehouse, and larger items arrive by freight with a liftgate drop at your curb or driveway. You get a tracking number by email as soon as the carrier picks up your order.
