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.
Bathroom Fan Installation Costs. The following prices are based on national averages; expect costs to be slightly higher or lower depending on the state in which you reside. 1  Bathroom fans themselves cost anywhere from $30-$300.2  Ultra-quiet combination units with a light and/or heater will be on the more expensive end of the spectrum. If the bathroom is located on the second floor (in a 2 story home) far from an exterior wall, labor costs will be cheaper to go into the attic and up through the roof. 2  The effectiveness of drawing air from the outside with the fan in this case will be much more difficult, however.