Slim, strong and insulating profiles, combined with high quality glazing, creates a thermally efficient window which is robust and easy to maintain. Outward opening vents with fixed panels. Top-Hung Opener Over Fixed Light 15 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.3W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile High Security Locking System uPVC Sill White Handle Top-Hung Opener Over Fixed Light 15 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.3W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile High Security Locking System uPVC Sill White Handle