50 x 70mm White Plastic Round Soffit Air Vents / Upvc Push Fit Eaves Disc / Fascia

For roof eaves ventilation – soffit application For remedial work on existing roofs On roofs where ventilation equivalent to a continuous 10mm opening is required On roofs where the eaves incorporate a soffit board Features & benefits Efficient, unobtrusive and easy to fit Can be fitted to existing soffit boards in situ 4mm wide holes comply with BS 5250 : 2002 Durable and totally resistant to decay UV stabilised and colourfast Quality Satisfies all NHBC Standards 2008 Edition Manufactured to BS EN ISO 9001 : 2008 Complies with all relevant Building Regulations Meets all relevant British Standards Material & colour choice Manufactured by injection moulding in polypropylene Available in white, black or brown Provides a free airflow of 1600mm² per unit and should be spaced at 160mm centres to achieve ventilation equivalent to a continuous 10mm opening Installation Advice The push in soffit ventilators are fitted to 70mm diameter circular holes, cut into the soffit board These holes should be drilled at 160mm centres in order to provide airflow equivalent to a continuous 10mm opening The push in ventilators are not ideally suited in situations where an airflow equivalent to a continuous 25mm opening is required It is very important that the holes are cut accurately and are not oversized; otherwise, the ventilators will not grip firmly in the fixing holes It is strongly recommended that a good quality and accurate hole saw is used