The Unitex Wall Terminal Large Louvre integrates an external weather louvre, wall sleeve, and duct connection spigot into a single unit. The satin anodised louvre provides full protection against weather. This model includes a 280mm wall sleeve section, with an optional 80mm sleeve available, and spigot connections accommodate ducts from 100mm to 400mm. Finished in epoxy powder coating, it is suitable for commercial ventilation installations. Stock reference: QSA150/280.