Manthorpe Plain Tile Vent (7000mm Airflow) - Terracotta The Manthorpe in-line plain 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 plain tiled roof. The vent is quick and easy to install, taking the place of a 3 plain tiles with no need to cut the battens. The in-line profile helps to maintain an unbroken appearance to the roofline whether used at high or low level. The tortured path through the internal weathering geometry is designed to maintain a constant airflow gap of 7,000 mm² whilst channelling any water ingress out of the vent and on to the roof covering below, with the 4mm louvred grill and placed to prevent the entry of debris and large nesting insects. Available in a range of four colours to suit most styles of concrete and traditional clay plain tiles from all major UK and Irish tile manufacturers. Product Benefits In-line and discreet low profile design 4mm louvred flyscreen grille No need to cut battens Range of colours available Profile suit top 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 35° roof pitch Airflow: 7,000 mm² Dimensions: 331mm x 330mm Top Material: uPVC Base Material: Polypropylene