Manthorpe Double Pantile In-line Roof Tile Vent This Manthorpe Double Pantile in-line tile vent - Dark Brown is an effective solution for rooftop ventilation. Designed to easily and quickly replace a single tile in the rooftop, this earthy toned brown pantile vent works to deter and problems caused in your roof space by a lack of ventilation.This neat and accessible tile vent also maintains a dependable airflow of 10,000mm² & removes any collecting water and clears it away on to the roof covering. The defensive louvred grille similarly performs to stop any un-needed parts, rubble or larger insects from producing un-needed extra work. This Manthorpe Double Pantile Roof Vent - Dark Brown creates hardly any trouble when fitting, as it is created to seamlessly attach to other tiles without ruining the look of your roof. The wholesome aesthetic of this vent is not the only asset, as the trusted manufacturer has painstakingly tested this tough vent with the use of a wind tunnel. The Manthorpe Double Pantile in-line tile ventilator is designed to provide a simple solution to the problems of roof space ventilation and mechanical extraction through a Double Pantiled roof. The profile vent is designed to replace a single tile and maintain an unbroken appearance to the roofline whether used at a high or low level. The tortured path through the 4mm louvred grille and internal weathering geometry are designed to maintain a 10,000 mm² of airflow whilst channelling any water ingress out of the vent and on to the roof covering. Features In-line and discreet low profile design 4mm louvred flyscreen grille Integral sidelock clip to ensure a secure fit Range of colours available Profiles suit 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 20º roof pitch Specification Size - 328x418mm Minimum Pitch - 20º Maximum Headlap - 100mm Materials - (Top) uPVC (Base) Polypropylene Colours - Terracotta | Slate Grey | Dark Brown | Antique Red  4