Greenwood UPVC Trickle Slot Vent 6000SFW 550mm Long in White

When placed in the top of a casement frame, a trickle vent will serve that purpose; providing a small opening that allows air to filter through the closed

Window trickle vents are small vents that are installed in the frame of a double glazed window They allow air to flow in and out of the window,

window slot Trickle Vents: An Essential Guide Window trickle vents, also known as trickle ventilators, are small openings in windows that allow a restricted flow of air

slot ovo A fully recessed plastic slot ventilator, the Titon XS16 Plastic Trickle Vent provides minimal visual intrusion, ideal for new-builds or to be retro-fitted