In a regular project, there are lots of factors to influence the installation period, for example installation height, suspension mode, construction type, installation time (day or night), condition of the worksite and etc. So the installation period is uncertain. The average installation period is depends on the length, and the amount of the duct. For average calculate, the installation period of a 1000m fabric duct is 7 days, and increase in proportion to length. For example, a standard supermarket with 15000sqm, need 5 days to install with 4 labors.