Bosch TR400121/24/27EB doorstromer 21 kW 400 V wit

The Bosch TR400121/24/27EB is a high-performance instantaneous water heater designed for multiple tap points, providing hot water on demand for showers, sinks, and more. With a rated power of 21 kW and 400 V three-phase connection, it delivers efficient and reliable performance for residential and light commercial applications.

Advantages

Energy efficiency class A ensures low operating costs. The electronic control with LCD display allows precise temperature setting from 20 to 60 °C. Compact wall-mounted design saves space. Bare wire heating system provides rapid heat-up. IP25 protection rating makes it splash-proof, suitable for installation in bathrooms.

Suitable for

• Multiple tap points (shower, sink, etc.)
• Pressure-resistant water systems
• Homes and small businesses requiring continuous hot water

Key specifications

• Rated Power: 21 kW
• Voltage: 400 V (3-phase)
• Rated Current: 30.3 A
• Energy Efficiency Class: A
• Max. Flow Rate (at 38°C): 11.4 l/min
• Temperature Range: 20 - 60 °C
• Control Type: Electronic
• Heating System: Bare Wire
• Water Connection: G 1/2"
• Protection Class: IP25
• Minimum Activation Flow Rate: 2.5 l/min
• Max. Permissible Pressure: 10 bar
• Display Type: LCD
• Installation Type: Wall-mounted, Pressure-resistant
• Application: Multiple Tap Points
• Color: White
• Cable Cross-Section (min.): 4 mm²
• Sound Power Level: 15 dB(A)

Recommendations

For optimal performance, ensure proper electrical supply (400 V 3-phase) and water pressure within specifications. Professional installation recommended.