It is very important if you have a chimney and most homes do have a chilmney even though they may not have a fireplace. You really want to make sure that it is cleaned out yearly because you never know what kind of stuff builds up in there or critters that are living in there blocking it up. You would not want to have a fire started in the chimney or create such an air blockage that you get CO2 in your home because of it. This is chimney safety week so now is the time to get it checked!