ZEHNDER Terraline channel radiator with natural convection UN-11-21/1400mm, heating capacity: 461W, cover plate to be ordered separately UN 11-21/ 1400/ ALUM.NAT

Channel Heater – Discreet Comfort and Efficient Heating

The Zehnder Terraline channel heater is the ideal solution for those who value aesthetics and functionality. Thanks to its design, the unit integrates seamlessly into interior décor, leaving visible only the aluminum frame and grille—making the heating system nearly invisible. This is especially important in spaces with large glazing, where traditional radiators might disrupt the architectural harmony.

Zehnder Terraline utilizes natural convection to distribute heat, ensuring quiet and efficient room heating. The heater’s design allows for the creation of continuous heating lines up to 4800 mm in length, with customizable dimensions to suit individual needs.

Construction and Application

The heater consists of a tank made from high-quality galvanized and powder-coated black steel. The heat exchanger is constructed from a copper-aluminum (Cu-Al) combination, guaranteeing efficient heat transfer. Maximum operating pressure is 10 bar, with an operating temperature of 110°C. The heating output at ΔT=50°C is 461 W for the model UN-11-21/1400mm.

Terraline channel heaters are suitable for a wide range of applications—from single-family homes to offices and commercial buildings. They are particularly recommended for spaces with large glazing, where they form an effective air curtain that minimizes heat loss.

Key Features and Benefits

• Discreet Design: The heater is nearly invisible after installation, preserving the interior’s aesthetic integrity.
• Efficient Heating: Natural convection ensures even heat distribution throughout the room.
• Quiet Operation: No fan means silent performance.
• Flexible Installation: Ability to connect multiple units into longer runs and custom sizing allows perfect adaptation to any space.
• Durability and Reliability: High-quality materials ensure long service life.
• Wide Range of Grilles: Available in various materials (aluminum, wood, stainless steel) to match interior styles—must be ordered separately.
• Easy Integration: Compatible with room thermostats or ON/OFF actuators for convenient operation.

Note: As of April 1, 2020, the grille for the Zehnder Terraline heater is available as a separate order item.