Stiebel Eltron 239223 Tempra 29 Plus Whole House Electric Tankless Water Heater
28.8 kW • 240/208V • Premium High-Capacity Tankless Performance with Advanced Flow Control
The Stiebel Eltron Tempra 29 Plus (Part #239223) is a top-tier, German-engineered whole house electric tankless water heater designed for maximum output, superior temperature stability, and industry-leading energy efficiency. Built for 240/208V applications, this model is engineered to handle large homes and high-demand commercial environments, delivering consistent, on-demand hot water across multiple fixtures without compromise.
Advanced Flow Control for Unmatched Temperature Stability
The defining feature of the Tempra Plus series is Stiebel Eltron’s patented Advanced Flow Control technology, which ensures precise temperature consistency even when demand exceeds system capacity. Instead of allowing temperature drops, the system intelligently adjusts flow to maintain the selected temperature.
This delivers:
- No cold water interruptions during peak demand
- Stable hot water across multiple fixtures
- Superior comfort in high-usage environments
Intelligent Self-Modulating Technology
The Tempra 29 Plus features microprocessor-controlled self-modulating technology, continuously adjusting power consumption based on incoming water temperature and flow rate. This ensures the system uses only the energy necessary to meet demand, maximizing efficiency while maintaining consistent performance.
The result is smooth, reliable hot water delivery, even as usage patterns fluctuate.
Maximum Output for Whole-House Demand
With a maximum output of 28.8 kW at 240V (21.6 kW at 208V), the Tempra 29 Plus is designed to support multiple high-demand fixtures operating simultaneously, depending on climate and installation conditions.
This high-capacity performance provides:
- Strong temperature rise in cold water conditions
- High flow rates across showers, sinks, and appliances
- Reliable hot water during peak usage periods
The tankless design ensures endless hot water with no recovery time, eliminating the limitations of traditional storage systems.
Energy Efficiency Without Standby Loss
Operating at up to 99% efficiency, the Tempra 29 Plus converts nearly all electrical energy into usable hot water while eliminating standby heat loss. This results in:
- Reduced energy consumption
- Lower operating costs
- Improved overall system efficiency
Precision Digital Temperature Control
A front-facing digital display allows for precise temperature adjustment and monitoring. The system maintains consistent output regardless of flow fluctuations, ensuring dependable comfort and performance throughout the home or facility.
Compact, Space-Saving Design
Despite its high output capacity, the Tempra 29 Plus features a compact, wall-mounted design that requires no venting. This allows installation in utility rooms, closets, or tight mechanical spaces while maximizing usable floor space.
Durable Construction and Long-Term Reliability
Built with a high-quality copper heating system, the Tempra 29 Plus is engineered for durability and long-term performance. It includes advanced safety and reliability features such as:
- Overheat protection
- Self-monitoring electronics
- Durable, impact-resistant housing
- Minimal maintenance requirements
This ensures dependable operation in demanding residential and commercial environments.
Technical Specifications
- Power: 28.8 kW (240V) / 21.6 kW (208V)
- Voltage: 240/208V
- Amperage: ~120A (240V)
- Maximum Flow Rate: Up to ~5.0–5.5+ GPM (depending on conditions)
- Temperature Range: Adjustable up to 140°F
- Connections: 3/4" NPT
- Efficiency: Up to 99%
- Electrical Requirement: Typically multiple dedicated breakers
- Compact wall-mounted design
Installation & Electrical Requirements
The Tempra 29 Plus requires a high-capacity electrical configuration, typically involving multiple dedicated breakers and sufficient service capacity. Installation should be performed by a licensed professional to ensure compliance with local codes and optimal performance.
The unit is UL listed, CSA compliant, and lead-free certified, ensuring safe and code-compliant operation.
Get the Best Price at ProDryers
When investing in a maximum-capacity tankless water heater with advanced temperature control, choosing the right supplier is critical. ProDryers is a trusted source for Stiebel Eltron products, offering expert guidance and competitive pricing.
Buy the Stiebel Eltron Tempra 29 Plus (239223) today at the best available price, or request a custom quote for bulk or project pricing.
Contact ProDryers now to secure expert support, aggressive pricing, and a premium tankless solution engineered for consistent, high-performance whole-house hot water.
