| 摘要 |
PROBLEM TO BE SOLVED: To facilitate piping work for a duct and shorten working time even in a house having a reduced working space. SOLUTION: A dust is constructed with a heat insulating duct 112, an outer duct 113, and an inner duct 111. A height adjusting member 129 is provided between the inner duct 111 on a core member 121 and the heat insulating duct 112, and a duct body 101 is fixed to a duct end 102 with a band 127. Hereby, the duct end 102 can be processed which is capable of easy one touch joining, and further since the duct is packaged by being compressed, the transportation cost can be lowered. Since there can be constructed the duct having the end capable of one touch joining in such a manner, duct construction is facilitated. |
