The Sentinel D‑Box Twin Fan 315mm (Stock Ref: SENT315T) is a commercial demand ventilation fan designed for dependable airflow performance. It supports duct diameters from 100mm to 500mm, delivering airflow between 0.001 and 1.3 m³/s, with pressure capabilities up to 650 Pa. Fitted with energy-efficient EC/DC motors and a lockable isolator, the fan provides safe and convenient operation. Its durable Aluzinc construction allows installation indoors or outdoors. Manufactured to BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this unit ensures effective and energy-conscious ventilation in commercial environments.