Thermal comfort can be defined as “that condition of mind which expresses satisfaction with the thermal environment” (CEN, 2005). Accumulated research studies on the relationship between temperature and workers performance indicate that there is a negative impact on performance due to a warmer temperature of 30°C and a cooler temperature of 15°C as compared to that at a human comfort temperature range of 21°C to 23°C. Similarly, work-related fatigue is higher at higher relative humidity (e.g. 70% RH) as compared to lower relative humidity (30-40% RH). It is acknowledged that workspaces need to be thermally comfortable for occupants to remain productive to their full capacity. Thermal comfort is based on the thermal adaptation of the individual occupant which is correlated to factors including geographic location and climate, time of year, gender, race, and age.