CGL Centre Pivot
The control bar is located at the top of the window allowing you to open and close the velux windows comfortably from near head height. It also allows you to place furniture directly beneath the window, thus freeing up useful space.
GHL Top Hung Window
A lot of our competitors only install Centre Pivot GGL VELUX windows, basically because they are cheaper and easier to install.
We also recommend installing Top Hung GHL VELUX windows, mainly for the reason that when they open they do not impinge into the attic space, but rather pivot outwards from the top.
There are a few clear advantages to this. Firstly, you get a better, more comfortable view with them; secondly, they have a dual function, so they can switch to centre pivot action for cleaning purposes; and finally, while strolling around your attic, you do not have to worry about banging your head on the side of the open window.