A strong, durable and easy-to-maintain uPVC window from Crystal. Featuring a multi-chambered profile with high-quality 28mm double glazing, it provides excellent insulation and energy efficiency for any modern home. This casement window has a top-hung opener over a fixed light, with trickle ventilation for improved airflow and an espag locking mechanism for security. Offering superior heat retention to single-glazed alternatives, double-glazed windows help to keep rooms warmer and reduce condensation build-up. Obscure double-glazed casement window Top-hung opener over a fixed light A-rated to 1.3 W/m²K Easy to clean and maintain Espag locking mechanism for security Trickle ventilation for improved airflow Classic white exterior and interior Includes frame, glass, white handle and cill Image shows product view from outside Product height includes PVC cill 10-year manufacturer's warranty (T & Cs apply) Crystal Casement uPVC Window Top Hung Opening Over Fixed Light 610mm x 1040mm Obscure Double Glazing in White. Upgrade your home with the stylish Crystal uPVC White Top Hung Over Fixed Light Obscure Double Glazed Glass Window 610 x 1040mm, featuring an energy efficiency of 1.3 W/m²K. It includes an advanced espag locking system and a high-efficiency double glazing. The window also comes with a frame, glass, PVC cill, handle, and a trickle vent for optimal airflow, blending modern style with exceptional performance. The window with overall height, including the cill, measures 610 x 1040mm. uPVC Windows, inc Double glazed glazing, Handle, Cill and Locking mechanism. PVC-U casement windows are the most popular style in the UK. They are characterised by outward opening vents which are combined with fixed panels (lights). They are available in a huge range of styles and colours. The profiles are slim, but strong and insulating. When combined with high quality glazing, they create a thermally efficient window which is robust and easy to maintain and will look good for years to come. Specification. Toughened Safety glazing included. OA product U Value 1.3W/mK. Background trickle ventilation. Espag locking system. White handle. uPVC Cill included (cill is included in the OA product height). Product viewed from the outside. 10 Year Product Warranty. Product is delivered by single person to kerbside only, w/c delivery slot and on day live tracking are sent via email.