Top Hung windows has various applications but are predominantely used for openings in structural galzing and curtain walls which open upto 45 degrees on the outside for ventilation and for fire escape. The second most important use is for the toilets were we can fixed the top hung windows with an exhaust arrangements with Frosted glass so that we can open them partly and can also have ventilation without any visibility from the outside. These are also available with child lock safety mechanism. They can be made using all the different series of the casement type.