Refurb Eaves Panel Vents Pack of 25 The Manthorpe G435 refurbishment eaves panel vents. Designed to maintain a flow of air to the roof space from the eaves. Size: 360 x 350 x 48mm. Suits 400mm rafter centres. Provides 25,000mm²/M of airflow. Used in refurbishment situations and can be fitted from inside of the roof. Creates a clear air gap between the loft insulation and felt. Flexible hinge enables it to achieve any roof pitch. Other sizes and roof vents available in our shop.