-"SICK BUILDING SYNDROME"  is a term used in office buildings.  Have you ever went to work and you hear the person next to you sneezing all day.  Just like any individual you would say, "i hope i don't catch whatever he or she has."  Unfortunately studies reveal that it has to do with your air delivery system.  According to National Institute of Occupational Safety and Health the occupants in buildings whose duct system has never been cleaned are 60% more likely to develop respiratory ailments.