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 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.he cost of installing a new exhaust can vary as it can be done as a do-it-yourself task or as a service rendered by a licensed mechanic or auto shop. 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.