丹麦的VELUX公司生产一种屋顶窗。这种屋顶窗的主要特点是充分利用房顶空间,按照房顶斜度(可在20°～85°) 倾斜安装。它的好处是可以在所花费用很少的情况下,得到更多的使用面积。如有高斜度的房顶,就不需很多的额外费用,便能扩大居住(或使用) 面积。同时能更好地使用地面,如不使用房顶空间的房子,经常有一部分地面未被利用,若将房顶空间变成居住面积,那么同样大的楼房,四层的便成为五层,节省了地面。由于窗子倾斜安装在房顶上,与同样大的垂直安装的窗子相比,它能有更充足的光线。这种充分利用房顶空 Danish VELUX produces a roof window. The main feature of this type of roof window is to make full use of the roof space, and install it according to the slope of the roof (it can be 20°~85°). Its advantage is that it can get more use area when the cost is less. If there is a high-angled roof, the living (or use) area can be expanded without much extra cost. At the same time, the ground can be better used. For example, if a house does not use the roof space, a part of the ground is often not used. If the roof space becomes a living area, then the same large building, the four-story building will become a five-story building. The ground. Because the window is tilted to the roof, it will have more light than a similarly large vertically mounted window. This makes full use of the roof space