The Crystal uPVC Top Opener Clear Double Glazed Window is 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.

Brand Name	Crystal
Colour	Grey & white
Material	uPVC
Manufacturer Model No	3GRYWH820820
Country of Origin	UK
Dimensions	820 x 820 mm
Height	820 mm
Width	820 mm
Weight	17 kg
Window Type	Top hung
Glazing Type	Double glazed
Glass Type	Clear glass
Finish	Grained external
Handing	Top opener
Heat Loss U Value	1.3 W/m2K
Years Guaranteed	10