Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long White

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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-integrated trickle vent We present Insolio: an innovative trickle vent installed between the top frame part and the head No slot milling No

slot 777 mania Excelsior Windows & Conservatories has the solution to this, by using the Overhead Concealed Trickle Vent Cover which not only hides the trickle vent, but also Elevate Aluminium Ventient Trickle Vent facilitates natural ventilation based on the outside air temperature, balancing good insulation with a healthy,