The RW Simons 5000 High Flow + is part of the Framevent range and is suitable for both timber and UPVC frames. Manufactured in the highest quality UV stabilised PVCu they are durable, easy to fit and fully tested. They feature an integral fly screen in the external hood and are available in a choice of colours. Measuring 525mm they offer an equivalent area as per BS 13141-1:2019 of 5205mm2 EA and compliance with Approved Document F 2021.