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.
The size of fan needed to effectively vent your attic is typically determined by the size of the area it will service. Installing a fan to accommodate a small building up to 1000 square feet costs an average of $287. The same project in moderately sized locations costs $344 for a 1000-1500 sq. ft., $428 for 1500-2000 sq. ft., and $507 for 2000-2500 sq. ft. Since larger buildings require even more substantial fans, installation prices average $679 for 2500-3000 sq. ft. sites and $814 for buildings of more than 3000 sq. ft.