R W SIMONS Framevent FV300 (300mm) & FV400 (400mm) Ventilator
The RW Simons FV300 and FV400 trickle vents are part of the Framevent range and are 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.
Equivalent area as per BS 13141-1:2019: FV300 2328mm2 EA / FV400 3180mm2 EA
Positive open and close action