A System100 wall outlet with gravity flaps for Ø100mm round duct, measuring 155 x 155 x 30mm in terracotta. Designed to provide a clean, weatherproof external wall termination for round ventilation ductwork, the gravity-operated flaps open freely under fan airflow and fall shut the moment the fan stops — keeping cold draughts and insects out of the duct run. The warm terracotta finish blends naturally with traditional brick and clay-tile external wall finishes, making it a popular choice for period properties and rural settings.

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

• System: Domus System100
• Type: Wall outlet with gravity flaps
• Duct connection: Ø100mm round
• Dimensions: 155 x 155 x 30mm
• Colour: Terracotta
• SKU: V4900T

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