When this method is used, a fixed asset is depreciated by the same amount each year. When using the straight-line method, you must specify one of the following options in the FA depreciation book: 1  The depreciation period (years or months) or a depreciation ending date.
Assuming the house has wood siding and there's an electrical line already in the bathroom, an electrician will charge $268 to install an exhaust fan, which includes the labor and material. You can buy the fan for $90 and install it, saving 66 percent. DIY Hassle Alert.
1 For the bathroom exhaust fan alone, the costs can be within the $25 to $65 range, depending upon the features and brand you want.2  According to one user on the forum DSLReports.com, most basic jobs will cost $200, and a complicated job that requires the contractor to crawl in the attic can cost upwards of $450. According to one user on the forum DSLReports.com, most basic jobs will cost $200, and a complicated job that requires the contractor to crawl in the attic can cost upwards of $450. 2  RedBeacon.com states that the average job is $152 to $330 to have a bathroom fan installed in the United States.