Stiebel Eltron 239219 Tempra 12 Plus Whole House Electric Tankless Water Heater
12 kW • 240/208V • Premium Whole-House Tankless Performance with Advanced Flow Control
The Stiebel Eltron Tempra 12 Plus (Part #239219) is a high-performance, German-engineered whole house electric tankless water heater designed for precise temperature stability, continuous hot water, and superior energy efficiency. Built for 240/208V applications, this model is ideal for residential and light commercial installations where consistent performance and user comfort are critical.
Advanced Flow Control for Superior Temperature Stability
The defining feature of the Tempra Plus series is Stiebel Eltron’s patented Advanced Flow Control technology. Unlike standard tankless systems that allow temperature fluctuations when demand exceeds capacity, this system automatically adjusts water flow slightly to maintain a consistent output temperature.
The result is:
- No unexpected cold water bursts
- Stable, reliable hot water at all times
- Enhanced user comfort in multi-fixture scenarios
Intelligent Self-Modulating Technology
The Tempra 12 Plus utilizes microprocessor-controlled self-modulating technology, continuously adjusting energy input based on flow rate and incoming water temperature. This ensures the unit uses only the energy required to meet demand, maximizing efficiency without sacrificing performance.
This intelligent system delivers smooth, consistent hot water output, even as usage patterns change.
Continuous Whole-House Hot Water
With a 12 kW output at 240V (9 kW at 208V), the Tempra 12 Plus is designed to provide endless hot water for multiple low-flow fixtures, depending on climate and installation conditions.
Because it heats water on demand, the system eliminates:
- Storage tank limitations
- Recovery time delays
- Standby heat loss
High Efficiency with Reduced Energy Costs
Operating at up to 99% efficiency, the Tempra 12 Plus converts nearly all incoming electricity into usable hot water. By eliminating standby losses, it delivers:
- Lower energy consumption
- Reduced utility bills
- Improved overall system efficiency
This makes it a cost-effective upgrade over traditional tank-style heaters.
Precision Digital Temperature Control
The unit features an intuitive digital temperature display, allowing precise adjustment of water temperature. The system maintains consistent output regardless of flow fluctuations, ensuring reliable performance and comfort.
Compact, Space-Saving Design
The Tempra 12 Plus features a compact, wall-mounted design that requires no venting, making it easy to install in utility rooms, closets, or tight mechanical spaces. Its streamlined design frees up floor space while simplifying installation.
Durable Construction and Long-Term Reliability
Built with a high-quality copper heating system, the Tempra 12 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 both residential and light commercial applications.
Technical Specifications
- Power: 12 kW (240V) / 9 kW (208V)
- Voltage: 240/208V
- Amperage: ~50A
- Maximum Flow Rate: Up to ~2.0–2.5 GPM (depending on conditions)
- Temperature Range: Adjustable up to 140°F
- Connections: 3/4" NPT
- Efficiency: Up to 99%
- Compact wall-mounted design
Installation & Electrical Requirements
The Tempra 12 Plus requires a dedicated 240/208V circuit, typically with a 50A double-pole breaker and sufficient electrical 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 premium tankless water heater with advanced temperature control, choosing the right supplier is essential. ProDryers is a trusted source for Stiebel Eltron products, offering expert support and competitive pricing.
Buy the Stiebel Eltron Tempra 12 Plus (239219) today at the best available price, or request a custom quote for volume or project pricing.
Contact ProDryers now to secure expert guidance, aggressive pricing, and a high-performance tankless solution designed for consistent, efficient whole-house hot water.
