ZEHNDER Terraline channel heater with natural convection UN-09-21/1800mm, heating capacity: 616W, cover plate to be ordered separately UN 09-21/ 1800/ ALUM.NAT

Channel Heater – Discreet Comfort and Efficient Heating

The ZEHNDER Terraline channel heater is the ideal solution for those who value minimalist design and efficient heating. The UN-09-21/1800mm model, featuring natural convection, performs exceptionally well in spaces with large glazed surfaces where traditional radiators may fall short. Its concealed installation preserves interior aesthetics, while its rapid heating time ensures quick and comfortable room warming.

The Terraline heater utilizes a heat exchanger combining copper pipes and aluminum fins, guaranteeing high performance and energy efficiency. The construction, based on a steel casing, ensures durability and corrosion resistance. Note that since 2020, the grille for the heater is sold separately, allowing customization to match individual stylistic preferences.

Construction and Operating Parameters

The Terraline heater’s design prioritizes easy installation and silent operation. The materials used—aluminum/copper in the heat exchanger and steel in the casing—ensure optimal heat transfer and long-term reliability. With a maximum operating pressure of 10 bar and a working temperature up to 110°C, it ensures safe operation under standard installation conditions. A heating output of 616W (according to EN 442 standard for ΔT=50°C) delivers sufficient thermal comfort even on colder days.

The heater features dimensions tailored to typical architectural solutions: the frame width is 215 mm, height is 90 mm, and the frame length is 1800 mm, enabling flexible application across various room types. The concealed connection technology further enhances the device’s aesthetic appeal.

Benefits for Installers and End Users

• Fast Installation: Simple construction simplifies installation and reduces commissioning time.
• Flexibility: Ability to customize the grille to suit individual design requirements.
• High Efficiency: Copper-aluminum combination ensures effective heat transfer.
• Discreet Design: Concealed installation preserves the interior’s visual harmony.
• Quiet Operation: Natural convection eliminates fan-related noise.
• Durability: High-quality materials ensure long-term reliability.
• Compatibility: Complies with EN 442 standard, ensuring conformity with established safety and performance regulations.