ZEHNDER Terraline convector radiator with natural convection UN-09-21/2000mm, heating capacity: 701W, grille to be ordered separately UN 09-21/ 2000/ ALUM.NAT

Channel Heaters – Discreet Thermal Comfort

The Zehnder Terraline channel heater is the ideal solution for those who value aesthetics and functionality. This model, utilizing natural convection, integrates seamlessly into interior design while providing efficient heating. Its construction ensures that only an elegant aluminum frame and grille remain visible after installation—allowing for nearly complete concealment of the heating system. This is especially important in spaces with large glazing, where the heater can function as an air curtain, minimizing heat loss.

Construction and Application

The Terraline heater consists of a robust steel casing coated with powder paint and a high-efficiency heat exchanger made from an aluminum-copper combination. This material pairing ensures rapid heating and effective heat distribution throughout the room. The device operates silently and invisibly, making it an ideal choice for living rooms, bedrooms, or offices. The maximum operating pressure is 10 bar, and the operating temperature is 110°C—guaranteeing reliability and long-term performance. With a heating output of 701 W, this model is suited for heating medium-sized areas.

Advantages and Benefits

• Discreet Design: The Terraline heater stands out with its minimalist appearance, perfectly complementing modern interiors.
• Efficient Heating: The Cu-Al heat exchanger ensures fast and uniform heat distribution.
• Quiet Operation: Natural convection eliminates noise associated with fan-driven systems, ensuring user comfort.
• Versatility: Ability to connect into longer runs and custom sizing allows perfect adaptation to the specific requirements of each space.
• Easy Installation: Supply and return connections can be swapped freely, simplifying integration with existing systems.
• Durability: High-quality materials ensure long-lasting operation.
• Wide Range of Grilles: Available in various types (linear, rolled) made from aluminum or wood, allowing customization to match individual aesthetic preferences (grilles available for separate order).
• Multiple Frame Colors: Frames available in natural aluminum, black, and brown (standard frame type J).

Note: The decorative grille must be ordered separately—since April 1, 2020, it is no longer included as standard. The grille frame width is 215 mm, height is 90 mm, and length is 2000 mm.