Window-integrated Trickle Vent - No Slot Milling

window slot vent
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Minimum Corresponding Vent Glazing Length & Slot • Natural upward deflection • Gas regulation mesh insect grille • Ready-made and bespoke sizes • Bar Length

It's a trickle vent If you leave it open, it allows a bit of ventilation even when the main window is closed

window slot vent Upvc Window Vents ; PVC Double Glazing Window Vent Drain Caps Drainage Cover uPVC White Free P&P · £ to £ Free postage ; Premium Trickle Slot Vent for

window slot Trickle vents are background ventilators integrated into window frames and door frames to allow a 'trickle-feed' of constant airflow from the outside to an