The Manthorpe Non-Profile in-line tile ventilator is designed to provide a quick and simple solution to the problems of roofspace ventilation and mechanical extraction / soil stack termination through a flat tiled roof. In-line and discreet low profile design 4mm louvred flyscreen grille Integral sidelock clip to ensure secure fit Profile suits all top tile manufacturers Fully independently wind tunnel tested Base outlet feeds directly into roof space, adaptor available for mechanical extraction Suitable for use down to a 20 degree roof pitch