Window Vents
Gareth this section could be potentially expanded to different forms of window ventilation if you can find more product suppliers …
Top search phrases:
window vents (2,100)
window vent (700)
upvc window vents (350)
window vent covers (200)
top websites:-
https://www.handlestore.com/window-vents
https://www.diy.com/building-supplies/ventilation/vents.cat?Material=uPVC