Universal roof tile vent to enable ventilation directly into a roof space or connect to a ducted ventilation system. Uses: On roofs with any type of tile or slate roof covering, Enables ventilation directly into a roof space, Can also be connected to a ducted ventilation system inside the building. • Suitable for roofs with a minimum pitch of 12.5° • Max free ventilation area of 20,000mm2 when cut at 170mm diameter • Max free ventilation area of 16,000mm2when cut at 150 diameter • Max free ventilation area of 11,000mm2 when cut at 125 diameter