Stiebel Eltron 239220 Tempra 15 Plus Whole House Electric Tankless Water Heater
14.4 kW • 240/208V • Advanced Whole-House Performance with Precision Temperature Control
The Stiebel Eltron Tempra 15 Plus (Part #239220) is a premium, German-engineered whole house electric tankless water heater designed to deliver continuous hot water, precise temperature stability, and superior energy efficiency. Built for 240/208V applications, this model offers increased output over entry-level units, making it ideal for homes and light commercial settings with moderate to higher hot water demand.
Advanced Flow Control for Unmatched 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 to maintain a consistent output temperature.
This ensures:
- No cold water interruptions
- Stable, reliable hot water delivery
- Enhanced comfort during simultaneous fixture use
Intelligent Self-Modulating Technology
The Tempra 15 Plus features microprocessor-controlled self-modulating technology, continuously adjusting energy input based on incoming water temperature and flow rate. This allows the system to use only the energy necessary to meet demand, maximizing efficiency while maintaining consistent performance.
The result is smooth, dependable hot water output, even under varying usage conditions.
Increased Output for Whole-House Demand
With a 14.4 kW output at 240V (10.8 kW at 208V), the Tempra 15 Plus provides enhanced capacity compared to smaller models. It is designed to support multiple low- to moderate-flow fixtures simultaneously, depending on climate and installation conditions.
This added power delivers:
- Greater temperature rise in colder climates
- Improved flow rates across fixtures
- Reliable performance during peak usage
The system provides endless hot water on demand, eliminating the recovery time limitations of traditional tank heaters.
High Efficiency with Lower Operating Costs
Operating at up to 99% efficiency, the Tempra 15 Plus converts nearly all electrical energy into usable hot water while eliminating standby heat loss. This results in:
- Reduced energy consumption
- Lower utility costs
- Improved overall system efficiency
Precision Digital Temperature Control
The unit features a front-facing digital display, allowing precise adjustment of water temperature. The system maintains consistent output regardless of demand fluctuations, ensuring reliable comfort and performance.
Compact, Space-Saving Design
Despite its increased output, the Tempra 15 Plus features a compact, wall-mounted design that requires no venting. This allows for flexible installation in utility rooms, closets, or tight mechanical spaces, freeing up valuable floor space.
Durable Construction and Long-Term Reliability
Built with a high-quality copper heating system, the Tempra 15 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 residential and light commercial environments.
Technical Specifications
- Power: 14.4 kW (240V) / 10.8 kW (208V)
- Voltage: 240/208V
- Amperage: ~60A (240V)
- Maximum Flow Rate: Up to ~2.5–3.0 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 15 Plus requires a dedicated 240/208V electrical circuit, typically with a 60A double-pole breaker and adequate 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 high-performance 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 15 Plus (239220) 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 premium tankless solution designed for consistent, efficient whole-house hot water.
