Results of the IAQ exposure measurement indicated low levels of contaminants or and potential pollutants inside three selected buildings. All IAQ parameters were meet the acceptable limit set by DOSH, Malaysia (ICOP, 2010), except the velocity of the PKBF building. The results pointed out that any of the IAQ parameters measured to be the only source of SBS in each building. These results were in a good agreement with a research that carried out by Jerry (2002) .