| 摘要 |
PROBLEM TO BE SOLVED: To provide opening structure in a building outer wall allowing for reduction in thermal load, and a method of using the same.SOLUTION: Opening structure 10 in a building outer wall of the present invention includes: a window 11 including a first window 12 covering a lower part of an opening 102 in a building outer wall 101 and a second window 13 which covers upper part of the opening part 102 and is openable/closable; and a window covering member 15 which is arranged inside the window 11 and includes an upper edge 15A and a lower edge 15B, the upper edge 15A being arranged in a vertically displaceable manner. |
