ZEHNDER Terraline duct convector radiator with natural convection UN-11-34/1400mm, heating capacity: 700W, grille to be ordered separately UN 11-34/ 1400/ ALUM.NAT

Channel Heater – Discreet Comfort and Efficient Heating

The Zehnder Terraline channel heater is the ideal solution for those who value both aesthetics and functionality. Based on natural convection, the system ensures even heat distribution, while its discreet design allows for nearly invisible integration into interior decor. This is an excellent choice for installers seeking proven solutions as well as end customers who expect comfort without compromising on design.

The Terraline heater consists of a durable steel casing and a high-efficiency heat exchanger made from aluminum-copper composite. This construction guarantees efficient heat transfer and long-term reliability. The unit operates quietly and heats up rapidly, delivering pleasant warmth in a short time. Note that the decorative grille is not included in the set and must be ordered separately—this offers broad customization options for the heater’s appearance.

Construction and Application

Zehnder Terraline utilizes natural convection—warm air rises, creating circulation and evenly heating the room. This is especially beneficial in spaces with large glazing, where the heater can act as a barrier against cold air descending from windows, minimizing heat loss and ensuring thermal comfort even under demanding conditions. The heater is designed for floor-mounted installation, and its low profile (110 mm height) enables discreet placement along walls.

• Heat exchanger: Made from aluminum and copper—a combination of efficiency and durability.
• Casing: Steel, powder-coated black—ensures corrosion resistance and an elegant appearance.
• Heating capacity: 700 W (at ΔT=50°C)—performance tailored to most room sizes.
• Operating pressure: Max. 10 bar—guarantees safe operation.
• Operating temperature: Max. 110°C—compatible with various heating systems.
• Grille frame width: 340 mm—compatible with standard room dimensions.
• Grille frame length: 1400 mm—ideal for larger spaces or creating continuous heating lines.

Terraline heaters are available in various lengths (from 800 mm to 4800 mm), allowing precise adaptation to individual needs and spatial layouts. The ability to connect multiple units in series increases system flexibility and enables heating of even large areas.