ZEHNDER Terraline duct heater with natural convection UN-09-21/1400mm, heating capacity: 446W, cover plate to be ordered separately UN 09-21/ 1400/ ALUM.NAT

The Zehnder Terraline duct heater is a discreet and efficient heating solution, ideal for both modern homes and demanding commercial installations. It utilizes natural convection to ensure even heat distribution without generating noise—particularly important in spaces where silence and comfort are valued.

The heater’s construction is based on a robust steel casing and a high-efficiency heat exchanger made of aluminum and copper—a combination that guarantees effective heat transfer and long-term reliability. The UN-09-21/1400mm model, with a power output of 446W, performs excellently in medium-sized rooms, delivering comfortable warmth even in spaces with large glazing. The floor grille must be ordered separately, allowing full customization to match your interior design.

Key features and benefits:

• Discreet installation: The heater is mounted beneath the floor, rendering it invisible, with only an elegant floor grille visible. This is the perfect solution for those who appreciate minimalist design.
• Energy efficiency: The use of natural convection and high-quality materials translates into optimal energy utilization and reduced heating costs.
• Thermal comfort: Even heat distribution eliminates cold spots and ensures consistent thermal comfort throughout the room.
• Wide applicability: Terraline heaters perform reliably in various room types—from living rooms and bedrooms to offices and conference halls.
• Durable construction: Made from high-grade steel and aluminum/copper, ensuring long service life and corrosion resistance.
• Hidden connection technology: Provides a clean, aesthetic installation with no visible technical components.

The Zehnder Terraline UN-09-21/1400mm heater features dimensions compatible with standard installation systems. The grille frame width is 215 mm, height is 90 mm, and length is 1400 mm, allowing flexible adaptation to different room layouts. The maximum operating pressure is 10 bar, and the operating temperature reaches up to 110°C—ensuring safe, reliable performance for many years.

Remember that the floor grille must be purchased separately—available in numerous designs and colors to fully personalize the installation’s appearance. The Zehnder Terraline heater is an investment in comfort, efficiency, and aesthetics for your interior.