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Window trickle vents are perfect for maintaining natural ventilation Our range of trickle vents provide a small opening in window frames and doors

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เว็บตรง slot pg Trickle vents, or slot vents, are small openings incorporated into windows or external walls of buildings The vent size you use depends on It's a trickle vent If you leave it open, it allows a bit of ventilation even when the main window is closed