The Sentinel D‑Box Twin Fan 315mm (Stock Ref: SENT315T) is a high-performance commercial demand ventilation unit. Designed for duct diameters of 100mm to 500mm, it delivers airflow from 0.001 to 1.3 m³/s and can manage pressures up to 650 Pa. Equipped with energy-efficient EC/DC motors and a lockable isolator, the fan ensures safe and controlled operation. Constructed from durable Aluzinc, it is suitable for both indoor and outdoor installation. Produced under BS EN ISO 9001 quality standards and tested to BS848 Part 1 & 2, this fan provides reliable, energy-conscious ventilation for commercial settings.