Slot vents for old windows

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

Window Trickle Slot Vent 440mm Dark Brown for Rosewood Mahogany uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully What is A Trickle Vent? In basic terms, when a window is manufactured a slot is drilled into the plastic frame and a cover is placed over it

yumi kazama porn video Designed and developed in the UK, Yale's SlotVent provides an effective through frame background ventilation solution, allowing fresh air in and stale air out Window Trickle Slot Vent 407mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable