| 摘要 |
PROBLEM TO BE SOLVED: To provide door and window of which the selective degree of freedom of heat insulation performance can be raised, the heat insulation performance can be easily changed even after installation, and the cost can be restrained. SOLUTION: As door panels, by combining three sorts of door panel bodies 21a-21c with three sorts of screens 22a-22c, total nine sorts of different heat insulation performance and the same depth dimension W3 are prepared, and a heat insulation door is manufactured by properly selecting from them. Accordingly, by freely selecting a door panel by a client, the selective degree of freedom of heat insulation performance as a heat insulation door can be improved. Further because the depth dimension W3 is the same, the door panels can be exchanged to each other, and the heat insulation performance as the heat insulation door can be changed even afterward. At this time, because a door frame 19A is unnecessary for exchanging, the exchange work is easily performed and the execution cost can be reduced.
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