| 摘要 |
PROBLEM TO BE SOLVED: To provide a window unit which hardly heat-cracks while possessing heat insulation performance.SOLUTION: A window unit has: a glass material in which a plurality of pieces of plate glass are opposed with each other at intervals, and which divides a space into a heated space side which is heated at a fire and a non-heated side; and a frame-shaped member having an accommodation part which accommodates the external peripheral end of the glass material over the whole periphery. In a region of the frame-shaped member positioned at the lower side of the glass material and forming the accommodation part, there is disposed a heat introduction part which introduces air heated at the heated space side into the accommodation part when the glass material is heated from the heated space side. |
