The telescopic wall conduct with exhaust air grille from Hastrag is an efficient solution for ventilating rooms. It is made of high-quality aluminium and offers a durable and corrosion-resistant construction. The single-sided aluminium louvre grille with drip nose ensures effective air circulation, while the rubber-mounted backdraft damper made of galvanised sheet metal prevents the backflow of air. The wall box can be extended from 350 to 550 mm, allowing flexible installation. Performance is measured in accordance with EN-13141-2 standards, which emphasises the efficiency and reliability of the product. With an air flow rate of 185 m³/h, this wall conduct is ideal for various ventilation applications. Extendable from 350 to 550 mm for flexible installation options. Rubber-mounted backflow flap to prevent air backflow. Performance in accordance with EN-13141-2 for high efficiency. High-quality aluminium construction for durability and corrosion resistance.