Have the chimney inspected by a qualified chimney professional. Chimneys should be checked and cleaned, if necessary, on an annual basis. If you are using a wood stove this season, be sure that the stovepipe was installed correctly according to the manufacturer’s recommendations and local codes. If there is any doubt, a building inspector or fire official can determine whether the system is properly installed. If you have a chimney that will not be used, consider having it sealed shut.