15 Reasons Why You Shouldn't Ignore new wooden sash windows
http://dahliadesigns.co.uk/Several-Opinions-About-Sash-Windows-That-You-May-Not-Have-Considered.html
Opening sliding sash windows fully provides your home with increased airflow, reducing the risk of issues associated with condensation. Its also the easiest to maintain. From casement to tilt and turn and sash