The Viking 21 slim line double glazed unit is available in both traditional and modern profiles. With a Uw of 1.2 W/m²K, it leads its field whilst still offering fantastic value for money.
Viking 21 Window (double glazed)
Uw = 1.24 W/m²K (1.23 x 1.48 m opening standard window)
Rw = 33 dB (-1;-4) - with standard glazing