A System100 wall outlet with gravity flaps for Ø100mm round duct, measuring 155 x 155 x 30mm in brown. Provides a neat external wall termination for round ventilation ductwork, with gravity-operated flaps that open under airflow and close automatically when the fan stops, preventing back-draughts and cold air ingress. The brown finish suits brick and stone external wall finishes.

Compatible with Ø100mm round ductwork. Supplied as a single unit.

• System: System100
• Type: Wall outlet with gravity flaps
• Duct connection: Ø100mm round
• Dimensions: 155 x 155 x 30mm
• Colour: Brown

Also available in White, Cream, and Terracotta. For a cowled version with damper, see the System100 Cowled Wall Outlet with Damper Brown. Browse the full Domus Ventilation range.