Merit:
First, the casement window structure is simple, the whole window can be 100% open, good air tightness when closed, high building thermal performance.
Second, the opening area is large, the ventilation is good, the sealing is good, and it has excellent sound insulation, heat preservation and impermeability performance.
Third, the inner casement window is convenient to clean the window, and the outer casement window does not occupy space when it is opened.
Fourth, the linkage hardware and handles arranged around the sash are operated indoors, and the four sides of the sash are fixed on the window frame when closed, and the security and anti-theft performance are excellent.
Shortcoming:
First, the sash will occupy a certain space after opening, and it should not be used when there is not enough space to accommodate the open window in some particularly narrow positions.
Second, the window width is small, and the field of view is not wide.
Third, the outer window opening to occupy a piece of space outside the wall, easy to damage when blowing wind, while the inner window will occupy part of the indoor space, the use of screen windows, curtains, etc. i
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