The Sentinel D‑Box Twin Fan 315mm (Stock Ref: SENT315T) is a commercial demand ventilation fan designed for reliable performance. It supports duct sizes from 100mm to 500mm, providing airflow ranging from 0.001 to 1.3 m³/s and pressure up to 650 Pa. Fitted with energy-saving EC/DC motors and a lockable isolator, it offers safe and efficient operation. Its Aluzinc construction ensures durability for both indoor and outdoor applications. Manufactured under BS EN ISO 9001 standards and tested to BS848 Part 1 & 2, this fan delivers consistent, energy-efficient ventilation in commercial environments.