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 However, prices for larger whole house fans can go as high as $550, and many homes need added attic ventilation to let the hot air escape quickly. 2  Coupled with professional installation services, this can bump the total cost to about $1,000-$1,600. Attic fans can be installed through the roof or through a side wall of the attic. 2  There is some potential for leakage after installing a roof-mounted attic fan, and in extreme cases an attic fan can bring noxious gasses back into the house. 3  The Natural Handyman describes the pros and cons of whole house fans.