https://www.livingetc.com/advice/how-to-open-a-sash-window-to-cool-down-a-room
Operating sash windows to improve your home's airflow is a breeze, as long as you know about this clever insider trick. Here's how it works.
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https://locksandhandles.co.uk/product/mila-upvc-window-ventilation-stay/
Jan 9, 2026 - Ventilation lock suitable for outward opening hinged windows
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