The Sentinel D‑Box Twin Fan 100mm (Stock Ref: SENT100T) is a reliable demand ventilation unit designed for commercial applications. It accommodates duct diameters from 100mm to 500mm, providing airflow rates from 0.001 to 1.3 m³/s and pressures up to 650 Pa. Equipped with advanced EC/DC motors and a lockable isolator, the fan offers efficient operation and straightforward maintenance. Its Aluzinc construction makes it suitable for both indoor and outdoor installations. Manufactured under BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this fan delivers energy-efficient, dependable ventilation for commercial environments.