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 On average, the cost to have a professional install an exhaust system can range anywhere from as little as $150 to as much as $500 for the labor only.2  Some of the major factors that affect the price include the make and model of the car, where it is done, and the complexity of the job. The cost of installing an exhaust system depends on location and type of facility. 2  For example, the average cost of installing an exhaust system in Cheyenne, WY, is $80.45 per hour at an independently-owned shop and $95.20 per hour at a franchise-owned facility.