Tub enclosures 10-25 yrs. Shower doors 20-25 yrs. Bookshelves life Depends on wood used. Trim and door 3-10 yrs. Wallpaper 3-10 yrs.
Useful life depends on usage.
Vent hood 15-20 yrs. Disposal 5-12 yrs. Exhaust fan 8-10 yrs. Water heater 5-12 yrs. Electric fixtures 20-50 yrs.